Tag: Claude AI

  • Move the Design System Before December 14 — the Chat Does Not Come With It

    Move the Design System Before December 14 — the Chat Does Not Come With It

    The standalone Claude Design site at claude.ai/design closes on December 14, 2026. After that date, the address opens Claude. Anthropic’s announcement gives the reason in one sentence: “Running two versions slows down fixes for both, so we’re folding the standalone site into Claude.”

    The migration that Anthropic offers moves design systems. It does not move projects. And the parts of your work that live only in the standalone product — the chats, the comments, the originals — have a deletion date, not a transfer path. This is the procedure for a team that has brand systems and client one-pagers in there, in the order the steps have to happen.

    What gets deleted, exactly

    Anthropic’s migration guide names the deletion list in two bullets: “Your chats with Claude” and “Comments on your projects and design systems.” Those stay in the standalone version and are deleted after it closes, per Anthropic’s data retention practices.

    Your originals are a separate statement, in the guide’s FAQ: they keep working in the standalone version until it closes on December 14, 2026, and “after that, they’re deleted.” A design system you migrate leaves its original behind in the standalone product, unchanged — and that original is on the same clock.

    Public links to standalone projects are a third outcome, and the guide words it differently on purpose: they “will no longer work after it closes.” Not deleted — dead. Every client you sent a public project link to holds a URL with an expiry date.

    The instruction Anthropic prints is the whole strategy for this section: save anything you need from your chats and comments before the standalone version closes. No fetched Anthropic page documents an export for chats or comments. The capture that matches the documentation is a screenshot of each comment thread and a copy of the chat text, done by hand.

    The dangerous sentence: “You don’t need to do anything with your projects yet”

    That sentence is in the migration guide, and it is true — your projects keep working in the standalone version until the close. It is also the sentence that will get client work deleted, because projects are the files with no migration path and a deadline.

    The Artifacts page in Claude lists up to 60 of your standalone projects, and they open in the standalone version. That list is a directory back into the product that is closing. It is not a move, and it is not a complete inventory if your team has made more than 60 projects. Anthropic’s position, in the guide’s words: “More details about moving your projects to Claude are coming soon.” Soon is doing a lot of work in that sentence, and December 14 is 56 days out.

    So the inventory step happens in the standalone product itself, not on the Artifacts list. Walk the standalone library for every client one-pager, deck, and brand system — including everything past the first 60 the Artifacts page shows.

    Before anyone clicks Migrate: the sharing problem

    One migration brings over every design system in your organization, including other people’s. It only needs to be started once — and anyone who can use Claude Design can start it, not just the organization’s owners. On individual plans there is no confirmation step at all: click, and it starts.

    The consequence that matters for a shop holding more than one client’s brand: “Published design systems that aren’t private will be shared with everyone in your organization and appear in their design system menu.” A system you published so your own projects would use it becomes an entry in every teammate’s menu the moment anyone runs the migration. On individual plans, nothing is shared — this is a team and organization trap, not a solo one.

    The precaution has to happen before the first click, because undoing it is not documented. In the standalone product, the setup guide names the Published toggle as the control that makes a system the organization’s working system. For every design system that should not appear in the whole organization’s menu, turn that toggle off first. A second migration is not a way back: a later run leaves an unchanged system alone and skips one that has changed inside Claude, so neither pass pulls a system out of the menu.

    Two kinds of systems do not migrate at all, no matter who clicks: “Empty design systems aren’t migrated, and neither are ones made from a built-in starter theme, even if you’ve edited them.” If your house brand began life as a starter theme you customized, the migration will silently leave it behind. There is no documented design-system export to fall back on. Copy the source assets out by hand before December 14.

    The export drill: one project, one zip

    There is no bulk download. Anthropic’s FAQ is blunt: “Not all at once. You can download them one at a time.” Open the project in the standalone version, click Share, choose “Project HTML” — for a slide deck, that item hides under “More formats and apps” — keep “Project archive” selected, and click Export.

    You get a .zip file with every file in the project. It is free and does not count toward your usage limits. Repeat it for every client one-pager and deck you cannot afford to lose, and store the zips outside Claude.

    Know what the zip is not. It is documented as every file in the project. Chats are on the deletion list, and no Anthropic page says the conversation comes along inside the archive. The zip preserves the files. The reasoning your team talked through in chat, and the client’s comments on the work, survive only if you captured them in the previous step.

    Enterprise: three switches, and one hard stop

    On Enterprise plans the migration is gated by settings that are easy to flatten into one wrong sentence, so take them separately. Artifacts themselves must be on — if they are off, people cannot migrate anything and will not even see the “Claude Design lives here now” banner.

    Design systems are a separate template switch: on for Team plans, off for Enterprise until an owner turns on Design systems in Organization settings > Artifacts. That is a different switch from Design and Slides, which Anthropic’s pages say were set to turn on by default on October 15, 2026 — a date that has now passed, with the help text still printing the scheduled sentence, so check your own settings rather than assuming either state. On plans with custom roles, each role also needs the Artifacts permissions, and a design system cannot be migrated if its owner’s role does not include design systems.

    The hard stop: “Organizations with zero data retention (ZDR) can’t turn on artifacts, so they can’t migrate.” If that is your organization, the migration procedure does not exist for you. The guide’s path is the per-project download, done before the close, one zip at a time.

    One more setting that does not do what an admin might hope: the Enterprise custom-retention article states that custom retention periods “do not apply to Claude Design.” The retention dial your organization already configured is not the instrument that keeps or deletes standalone chats, comments, or originals. The closure is.

    After it lands

    A migrated design system keeps its files as they were, and it cannot be hand-edited on its page yet. Its editors see the note: “Migrated from the standalone version. Ask Claude to make changes.” The editing model for a migrated brand system is a conversation, not a settings page.

    If someone edits a migrated system inside Claude and you later run the migration again, that system is listed under Skipped — “changed on claude.ai, left as they are” — so your edits are not overwritten. Replacing it with a fresh copy is a deliberate act: duplicate it first if the Claude-side changes matter, delete it in Claude, then migrate again.

    New design work lives in three doors now: any chat (ask for a design, or Output > Design in the message box), the Artifacts tab, and Claude Code, with /design to create, edit, and sync designs and /design-sync to pull in your design system. All of it draws on the same usage pool as the rest of Claude, including Claude Code — the separate weekly Claude Design allowance the product launched with is already gone, per the get-started guide.

    Two gaps in the new home are worth knowing before you move the team: Claude Design does not have version history yet, and inline comments there occasionally fail to appear on the page — Anthropic’s own workaround is to paste the feedback into the chat instead. The standalone product’s comment threads, the ones being deleted in December, are still the reliable record until you screenshot them.

    The order is the procedure

    Inventory in the standalone product. Turn off Published on anything that must not become an organization-wide menu entry. Mark the empty and starter-theme systems the migration will refuse, and copy their assets out by hand. Export every project that matters, one zip at a time. Screenshot the comments and copy the chats. Only then — owners having turned on Artifacts, Design systems, and the role permissions — does one person click Migrate, read the results window, and fix any failed system in the standalone product before running it again.

    Do those steps in that order and December 14 is a non-event: the address starts opening Claude, and everything you cared about is already there or already saved. Do them out of order — migrate first, inventory later — and the button will happily move the systems while the projects, comments, and originals sit in a product with 56 days left on it. We track vendor surface changes like this one on the desk because the procedure is always in the help pages; it is just never in the announcement. The announcement for this closure said chats and comments “won’t be available.” The help center is the text that says deleted.

    Sources: Anthropic’s migration guide, Migrate from standalone Claude Design to Claude, and the get-started guide, Get started with Claude Design, both read in full on October 19, 2026. A related surface change, worked the same way: Cursor’s shareable canvases, and how we check a vendor’s what’s-new claims in What’s New in Cursor Is a Claim.

  • Cursor Pricing Page Now Lists Plus $8 / Premium $30 — Third-Party Models at API List

    Last refreshed: October 13, 2026 against cursor.com/pricing and cursor.com/docs/models-and-pricing.

    The live Cursor pricing page lists a new ladder. Free is limited. Plus is $8/month and includes Grok models only. Premium is $30/month with 4x Plus usage and third-party models (Claude, GPT, Gemini) billed at API list price. Super is $100/month (15x). Ultra is $200/month (50x). Teams start at $30+ per user.

    The docs page still describes older Pro $20 / Pro Plus $60 / Ultra $200 plans with separate Cursor Models and Other Models pools. Existing subscribers may keep prior plans. Quote both sources. Do not average them.

    Claude seats did not move. Pro remains $20/month or $17 annual. Max 5x is $100, Max 20x is $200. Claude Code is included in paid Claude plans and shares the usage pool. API list rates are unchanged: Haiku 5.5 $0.10/$0.50 under 100k prompts, Sonnet 5.5 $2/$10 with $0.10 cache reads, Opus 5.5 $4/$20.

    The split that matters for operators: to run Claude models inside Cursor you now need Premium ($30) plus API list charges on top. A Claude Pro seat is still $20 and includes Claude Code. Two products, two meters.

    Confirm live numbers on the official pages before you change a workflow. This is the plan structure on the pricing page as of October 13, 2026.

  • What’s the Difference Between Notion AI and Claude with Notion MCP?

    Short answer

    Notion AI works inside Notion on the page you’re looking at. Claude with the Notion MCP connector works across your whole workspace — and across everything else Claude can reach. One is a writing assistant; the other is an operator with a badge to the building.

    What Notion AI actually is

    Notion AI is the assistant built into Notion. It summarizes the page you’re on, drafts text, fixes grammar, translates, and answers questions about the current page or selected blocks. It lives in the sidebar and the slash menu. Its world is the page in front of you.

    What it doesn’t do: reach across dozens of pages to synthesize an answer, pull in context from outside Notion, run on a schedule, or take multi-step actions like updating ten database rows from a meeting transcript.

    What Claude + Notion MCP actually is

    The Notion MCP connector gives Claude live read and write access to your Notion workspace through the Model Context Protocol. Claude can search every page you can see, query databases, summarize long docs, draft new pages, append rows, and update properties — in plain language, no API code.

    Because it’s Claude, the context isn’t limited to Notion: the same conversation can cross-reference your email, your calendar, a spreadsheet, or the web, then write the result back into Notion. Notion AI can’t leave the building; Claude was never confined to it.

    Side-by-side

    Scope: Notion AI — current page and selected blocks. Claude + MCP — your entire workspace, plus everything else Claude connects to.

    Scheduling: Notion AI — only when you click it. Claude + MCP — can run on a timer (morning briefings, weekly digests) via scheduled jobs.

    Actions: Notion AI — generates and edits text. Claude + MCP — reads, writes, updates database properties, creates pages, appends rows.

    Cross-app reasoning: Notion AI — none. Claude + MCP — the point of the whole setup.

    Data boundary: Notion AI — stays inside Notion’s trust boundary. Claude + MCP — your Notion content flows through Claude, which has its own data handling. For confidential material, scope what the connection can see.

    Cost shape: Notion AI — priced per seat (often bundled into higher-tier plans). Claude + MCP — your Claude plan plus the time to set up the connector once.

    Which one do you actually need?

    If your problem is “help me write this page faster,” Notion AI is enough. If your problem is “every Monday I spend an hour turning scattered notes into a briefing,” “nobody can find anything in our workspace,” or “I need this database updated from that meeting” — that’s Claude + MCP territory. Most teams that try both end up using Notion AI for drafting and Claude for everything operational.

    The approval habit applies to both, but it matters more with Claude: Notion AI suggests text you accept; Claude with write access can change shared data. Claude drafts, you approve.

    Frequently asked questions

    What’s the difference between Notion AI and Claude with Notion MCP?

    Notion AI is an in-app writing assistant scoped to the page you’re viewing. Claude with the Notion MCP connector is a workspace-wide operator: it can search, read, summarize, and write across your entire Notion workspace, run on a schedule, and combine Notion with your other tools. Use Notion AI for drafting; use Claude + MCP for operations.

    Can I use both at the same time?

    Yes, and that’s the common setup. Notion AI handles inline drafting and quick summaries; Claude via MCP handles cross-workspace research, scheduled digests, and database operations. They don’t conflict.

    Is Claude with Notion MCP a replacement for Notion AI?

    Not exactly. It replaces the need for Notion AI in many workflows, but Notion AI is still faster for one-click, in-page tasks like “make this shorter.” Think of Claude + MCP as the upgrade path when Notion AI’s page-sized world gets too small.

    Related: Notion MCP setup with Claude · Securely connect your workspace

  • Claude Haiku 5.5 Lists at $0.10 / $0.50 — Sonnet 5.5 Cache Reads Halved

    Last refreshed: October 8, 2026 (Pacific)

    Anthropic launched Claude Haiku 5.5 on October 7, 2026. Seat prices on claude.com did not move. The operator event is a new SKU at a lower unit price, plus a cache-read cut on Sonnet 5.5.

    Official sources: anthropic.com/claude-haiku-5-5, platform.claude.com pricing, October 7 rate card, claude.com/pricing.

    What changed

    Haiku 5.5 is a new SKU. It is not a rename of Haiku 4.5. Haiku 4.5 remains on the list at $1 / $5. Anthropic says about 90% of prior Haiku requests were under 100,000 tokens, which is the cheaper band.

    Haiku 4.5Haiku 5.5 ≤100kHaiku 5.5 >100k
    Input / MTok$1$0.10$0.50
    Output / MTok$5$0.50$2.50
    Cache write (5-minute)$1.25$0.125$0.625
    Cache read$0.10$0.01$0.05
    Batch input / output$0.50 / $2.50$0.05 / $0.25$0.25 / $1.25

    Sonnet 5.5 input and output did not move. Cache reads did: $0.20 to $0.10 per million tokens. Anthropic says that is about 20% cheaper on most agentic work because cache reads are a large share of the bill. Sonnet 5 cache reads stay $0.20. Opus 5.5 stays $4 / $20 with cache reads at $0.20.

    Do not average the two Haiku 5.5 bands. A prompt over 100,000 tokens pays the higher line. Haiku 5.5 also uses the newer tokenizer, so the same text can be more tokens than Haiku 4.5. The posted rate is not the whole bill.

    What did not change

    Free $0. Pro $20 monthly / $17 annual. Max 5x $100 and Max 20x $200 on the web Help Center. Team Standard $20 annual / $25 monthly per seat. Team Premium $100 annual / $125 monthly. Enterprise $20/seat plus usage at API rates. Cursor Pro stays $20; Pro+ $60; Ultra $200; Teams $40/user on cursor.com/pricing, with Teams Premium $120 on the docs page.

    Anthropic said it will roll out monthly Claude Platform credits this week: Max 5x $100, Max 20x $200, Team up to $500 pooled. That is an announced credit, not a seat-price cut. Confirm in the Help Center article before you book it.

    Operator note

    If a loop is pinned to Haiku 4.5, it is still on the $1 / $5 meter. Move it to Haiku 5.5 only if the workload can take the new model and you watch the 100k prompt line. Cursor on-demand that bills Anthropic list will pick up the new SKU when Cursor exposes it. Cursor seat prices did not move with this launch.

    Live desks: API rates · seat tiers · Claude Code vs Cursor.

  • Claude for Ecommerce: What Business Owners Can Actually Do With It (2026)

    Claude for Ecommerce: What Business Owners Can Actually Do With It (2026)

    Claude for ecommerce means using Anthropic’s Claude AI across the jobs around selling online — writing product content, answering customer questions, cleaning up catalog data, and getting your store ready for the AI shopping agents that are starting to buy on customers’ behalf.

    Not hype. Not a robot that runs your store. Just a very capable assistant pointed at the work that eats your week. Here’s what that looks like in practice.

    The Four Lanes

    Every ecommerce use of Claude falls into one of four lanes. Pick the lane with the most pain first.

    1. Product content

    Write and fix product descriptions at scale. Give Claude your specs, your brand voice, and a few examples of descriptions you like. It drafts the rest — titles, bullets, meta descriptions, alt text. The job isn’t “write it for me,” it’s “write the first draft so I’m editing instead of staring at a blank page.”

    Clean your catalog. This is the unsexy one that pays the most. Missing GTINs, inconsistent size formats, half-empty attribute fields — Claude reads a product export and tells you exactly what’s broken, row by row. Clean catalog data is also what AI shopping agents read when they decide whether to recommend your products, so this work compounds.

    2. Customer conversations

    Pre-sale questions. “Does this come in blue?” “Will it arrive by Friday?” “What’s your return policy?” Claude-powered chat answers these from your actual policies and product data — not from a script that breaks the moment someone asks something unexpected.

    Support triage. Claude reads the incoming ticket, pulls the order details, and drafts the response or routes it to the right person with a summary. Your team stops starting from zero on every message.

    Returns and post-purchase. The most common post-purchase questions have known answers. Claude handles them; humans handle the exceptions. That’s the whole model.

    3. Back-office ops

    Supplier and vendor email. Drafting, summarizing threads, pulling action items out of long exchanges. The inbox work nobody wants to do.

    Reporting in plain English. Feed Claude your sales export and ask what changed this week, which products are slipping, and what’s driving the shift. You get the insight without building the dashboard first.

    SOPs and training. Turn “how we do returns” from tribal knowledge into a written process a new hire can actually follow.

    4. Getting agent-ready

    This is the lane most owners are missing. AI shopping agents — built on Claude, among others — are starting to complete purchases on behalf of buyers. They don’t browse your site. They read your structured data: product feeds, schema markup, policies as data.

    Claude helps you become the store agents recommend: auditing your product data for completeness, generating the structured content agents consume, and testing your checkout the way an agent experiences it. The merchants who do this work now get recommended. The ones who don’t get skipped — quietly, by software, at scale.

    What It Costs to Start

    Less than you think. A Claude Pro subscription covers the conversational work — drafting, analysis, inbox help. API usage covers the automated work — catalog cleanup, chat on your site, ticket triage — and it’s metered, so a small store’s bill is small. We’ve got a full breakdown of Claude’s pricing, plans, and limits if you want the numbers.

    The expensive part was never the tool. It’s the hour you spend figuring out where to point it first. Start with one lane, one workflow, one repeatable job. Get that working before you add the second.

    What Claude Won’t Do

    Honest limits, because overselling helps nobody:

    It won’t run your store. Pricing decisions, supplier relationships, and judgment calls stay human. Claude drafts; you decide.

    It needs checking on anything customer-facing. Product descriptions, policy answers, support replies — review before they ship, especially early. The error rate drops as you tune it, but the review habit shouldn’t.

    It doesn’t replace your data. Claude is only as good as what you feed it. Wrong inventory data in, confident wrong answers out. Fix the source data — that’s lane one for a reason.

    Getting Started: The First Week

    Day 1–2: Pick one job. The one you dread most that happens every week. Product descriptions, support replies, inbox triage — one thing.

    Day 3–4: Show Claude how. Give it 3–5 examples of the job done well. Examples beat instructions every time.

    Day 5: Run it supervised. Let Claude do the job, review everything, correct what it gets wrong. The corrections are training.

    Week 2: Loosen the grip. Once the output is consistently right, review spot-checks instead of everything. Add the second job.

    Related Reading


  • Claude Sonnet 5.5: Near-Opus Scores at the Sonnet Price

    Last verified: October 6, 2026 (Pacific).

    Direct answer: Anthropic released Claude Sonnet 5.5 on September 28, 2026 — the second model in the Claude 5.5 family, six days after Opus 5.5. The headline: $2 per million input tokens and $10 per million output tokens — the exact same price as Sonnet 5 — while Anthropic's benchmarks put it near Opus 5.5 on most evals and ahead of it on Terminal-Bench 4.0. A typical workload costs about 30% less than Sonnet 5, because the model uses fewer tokens per task.

    Same price, different model

    Anthropic describes Sonnet 5.5 as "a faster, lower-cost complement to Claude Opus 5.5," strongest at well-scoped everyday tasks, bug fixing, and creating polished documents, slides, and spreadsheets. The price table:

    Sonnet 5.5 Sonnet 5 Opus 5.5
    Input / output per 1M $2 / $10 $2 / $10 $4 / $20
    Cache reads per 1M $0.20 — $0.20
    Typical workload vs predecessor ~30% less — ~40% less

    Cache writes run $2.50 per million (5-minute) and $4.00 (1-hour). The Batch API halves input and output to $1/$5. The full 1M-token context window is billed at the standard rate — no long-context surcharge.

    The benchmarks, with Anthropic's own caveat attached

    These are Anthropic's numbers from its launch table. The company's own caveat is worth quoting in full: "Opus 5.5 remains clearly stronger at complex, open-ended work requiring sustained judgment." Read the table as a cheaper model closing most of the gap, not as a Sonnet that replaces Opus.

    Benchmark Sonnet 5.5 Sonnet 5 Opus 5.5
    Terminal-Bench 4.0 (agentic coding) 70.6% 10.3% 66.4%
    CursorBench 4.0 55.5% 34.1% 57.8%
    GDPval-AA v2.1 (knowledge work, Elo) 1844 1449 1846
    OSWorld 2.1 (computer use) 80.1% 57.0% 81.8%
    Humanity's Last Exam (with tools) 64.5% 54.9% 67.7%

    The Terminal-Bench number deserves a pause: 70.6% for a $2/$10 model beats not just Sonnet 5's 10.3% but Opus 5.5's 66.4%. That is the single most aggressive price-performance move in this release cycle. As always, validate against your own tasks before rerouting production traffic.

    Switching: what breaks

    Moving from Sonnet 5 to Sonnet 5.5 is not drop-in. Five documented breaking changes: disabled thinking, forced tool use, replaying thinking blocks across accounts, the old computer_20251124 tool on the API and Google Cloud, and using older models as advisors in the advisor tool. Test before you cut over.

    Separately: Sonnet 4.5 retires November 30, 2026, and Anthropic names Sonnet 5.5 as its replacement. If you still have 4.5 in a pipeline, that migration has a date on it. Sonnet 5 is not listed for retirement as of October 1.

    Worth knowing

    • Effort defaults differ by surface. High on the Claude Platform; medium in Claude Code and the Claude apps. Like Opus 5.5, effort is the first dial — tune it before rewriting prompts.
    • First Sonnet with Opus-class cyber safeguards. Anthropic says Sonnet 5.5's cyber capabilities are a large jump over Sonnet 5, so it ships with safeguards previously reserved for top models. Higher-risk cybersecurity prompts get detected and routed to Sonnet 5 instead; ordinary coding and bug-fixing are unaffected.
    • Where it runs. Claude apps, Claude Code, Claude Platform, Amazon Bedrock, Google Cloud, Microsoft Azure. Model ID claude-sonnet-5-5. 1M-token context, 128K max output, June 2026 knowledge cutoff.

    The honest read: Anthropic kept the sticker price flat and moved the performance. For everyday agentic coding and knowledge work, Sonnet 5.5 is now the default answer — until your workload is complex and open-ended enough that Opus 5.5's sustained judgment earns its 2x price. For the Opus side of that tradeoff, see our Claude Opus 5.5 release coverage.

  • Claude Opus 5.5: Fable-Level Performance at 40% Less Than Opus 5

    Last verified: October 5, 2026 (Pacific).

    Direct answer: Anthropic released Claude Opus 5.5 on September 22, 2026 — the first model in the Claude 5.5 family. It matches Claude Fable 5.1 on most work while costing 40% less to run on a typical workload than Opus 5. API pricing: $4 per million input tokens, $20 per million output tokens, 20% lower than Opus 5 across the board. Cache reads dropped 60% to $0.20 per million tokens. Opus 5 is now legacy.

    What actually changed

    Three moves at once: cheaper, faster, and smarter at using less effort.

    • Price. $4/$20 per million input/output tokens, down from Opus 5's $5/$25. Cache reads fell from $0.50 to $0.20 per million — a 60% cut.
    • Speed. Output generation is more than 30% faster than Opus 5. A faster serving mode runs 2.5x faster at double the price ($8/$40 per million tokens).
    • Effort. Opus 5.5 defaults to *medium* effort, one step below Opus 5's high default. Anthropic's testing found medium-effort 5.5 matches or beats high-effort Opus 5 on coding and knowledge work. Thinking cannot be turned off on Opus 5.5 — requests that try get an error.

    The benchmarks, with the caveat they deserve

    All numbers below are Anthropic-reported, not independently reproduced. Treat vendor benchmarks as direction, not gospel — validate against your own task corpus.

    Benchmark Opus 5.5 Fable 5.1 Opus 5
    Terminal-Bench 4.0 (agentic coding) 66.4% 55.8% 52.3%
    GDPval-AA v2.1 (professional work, 44 occupations) 1846 Elo 1735 1708
    AutomationBench (task completion) 40% — 26.9%
    FrontierCode (max effort) 54.4% 50.3% —

    Anthropic also claims Opus 5.5 at default effort beats Opus 5 at maximum effort on Terminal-Bench at about a fifth of the cost, and matches GPT-6 Astra there at roughly 40% of the cost. Cost-per-task is the more honest frame than headline margins.

    Prompting: effort is the first dial

    Anthropic published prompting guidance alongside the release, and the headline advice is simple: stop reusing your Opus 5 effort settings. The effort setting — low, medium, high, xhigh, max — is now the first control for balancing quality against speed and cost, before prompt changes.

    Two concrete changes worth making:

    1. Test effort levels directly. Don't assume high is better. In Anthropic's testing, medium 5.5 matches high Opus 5.

    2. Reconsider "think carefully" lines in chat apps. Opus 5.5 decides for itself how much to think, with effort as the main control. Anthropic's own test showed removing a think-carefully instruction made replies start sooner with no clear quality drop.

    Opus 5 prompts still work without edits — the existing guidance is a reasonable starting point. Adjust effort before rewriting prompts, and reserve xhigh and max for tasks where quality really moves.

    Availability and context

    Opus 5.5 ships on Anthropic's platform and through AWS, Google Cloud, and Azure. It carries a 1M-token context window with 128K maximum output. Before launch, external evaluators including Frontier Design and METR tested the model, and Anthropic says it recorded its best result to date on the company's automated behavioral audit.

    This is the first release since CEO Dario Amodei's September essay calling on the industry to pace frontier development — and Anthropic shipped it with the same cybersecurity and biosafety measures as Fable 5.1, plus published evaluator access, which is the pacing commitment in concrete form.

    The rest of the family is filling in: Sonnet 5.5 landed September 28 at $2/$10 with the same $0.20 cache reads and 30%+ speed gain over Sonnet 5, and Haiku 5.5 is listed as coming soon. For the full lineup and legacy status, see our Claude Release History (Sept 2026).

  • Claude Sonnet 5.5 Lists at $2 / $10 — Same Unit Price as Sonnet 5

    Last refreshed: October 5, 2026

    Anthropic launched Claude Sonnet 5.5 on September 28, 2026. Seat prices on claude.com did not move. The operator event is a new SKU, not a unit-price cut: Sonnet 5.5 lists at $2 per million input tokens and $10 per million output tokens — the same pair as Sonnet 5.

    Official sources: anthropic.com/claude-sonnet-5-5, platform.claude.com pricing, September 28 rate card, claude.com/pricing.

    What changed

    Sonnet 5.5 is a new SKU, not a rename of Sonnet 5. Anthropic says it runs 30%+ faster than Sonnet 5 and costs up to 30% less per task because it uses fewer tokens, not because the published rate fell.

    Sonnet 5Sonnet 5.5
    Input / MTok$2$2
    Output / MTok$10$10
    5-minute cache write$2.50$2.50
    1-hour cache write$4$4
    Cache read$0.20$0.20
    Batch$1 / $5$1 / $5

    Do not treat “30% less per task” as a 30% list-price cut. The meter is still $2 / $10. US-only inference stays 1.1x on Claude 4.6 and later models.

    What did not change

    Free $0. Pro $20 monthly / $17 annual. Max from $100 (5x) and $200 (20x). Team Standard $20 annual / $25 monthly per seat. Team Premium $100 annual / $125 monthly. Enterprise $20/seat plus usage at API rates. Opus 5.5 remains $4 / $20. Haiku 4.5 remains $1 / $5. Fable 5.1 remains $10 / $50 with $0.25 cache reads. Cursor Individual stays $20; Cursor Teams stays $40/user on cursor.com/pricing.

    Operator note

    If you are pinned to claude-sonnet-5, you are still on the $2 / $10 meter. Switch to claude-sonnet-5-5 if the workload can move and you want the newer model. Cursor on-demand that routes to Anthropic list will pick up the new SKU when Cursor exposes it — Cursor seat prices did not move with this launch.

    Live desks: API rates · seat tiers · Claude Code vs Cursor.

  • Claude Opus 5.5 Cuts Token Price 20% — $4 / $20 List

    Last refreshed: October 6, 2026 (Pacific)

    Anthropic launched Claude Opus 5.5 on September 22, 2026. Seat prices on claude.com did not move. The operator event is the unit price: Opus 5.5 lists at $4 per million input tokens and $20 per million output tokens — 20% below Opus 5 at $5 / $25.

    Official sources: anthropic.com/claude-opus-5-5, platform.claude.com pricing, September 22 rate card, claude.com/pricing.

    What changed

    Opus 5.5 is a new SKU, not a rename of Opus 5. Anthropic says it performs at the level of Fable 5.1 on most work and costs about 40% less than Opus 5 on typical token-billed workloads because cache reads fell more than the headline rate.

    Opus 5Opus 5.5
    Input / MTok$5$4
    Output / MTok$25$20
    5-minute cache write$6.25$5
    1-hour cache write$10$8
    Cache read$0.50$0.20
    Fast mode$10 / $50$8 / $40
    Batch$2.50 / $12.50$2 / $10

    Cache reads on Opus 5.5 are 0.05x input ($0.20), not the 0.1x used on Opus 5. That is the line that moves agent and Claude Code bills. US-only inference stays 1.1x on both SKUs.

    What did not change

    Free $0. Pro $20 monthly / $17 annual. Max from $100 (5x) and $200 (20x). Team Standard $20 annual / $25 monthly per seat. Team Premium $100 annual / $125 monthly. Enterprise $20/seat plus usage at API rates. Sonnet 5.5 remains $2 / $10. Haiku 4.5 remains $1 / $5. Fable 5.1 remains $10 / $50 with $0.25 cache reads.

    Opus 5.5 is available on Pro, Max, Team, and Enterprise. Anthropic also said five-hour usage limits on those plans increased with the launch. Confirm the live window in Settings > Usage. Do not treat a help-center message count as a hard cap.

    Operator note

    If you are pinned to claude-opus-5, you are still on the $5 / $25 meter. Switch to claude-opus-5-5 if the workload can move. Fast mode is first-party Claude API only at $8 / $40. Cursor on-demand that routes to Anthropic list will pick up the new SKU when Cursor exposes it — Cursor seat prices on cursor.com ($20 Individual, $40 Teams) did not move with this launch.

    Live desks: API rates · seat tiers · Claude Code vs Cursor.

  • Sonnet 5 List Is $2 / $10 Again (September 22, 2026)

    Last refreshed: October 6, 2026 (Pacific).

    Checked September 22, 2026 against platform.claude.com/docs/en/about-claude/pricing and claude.com/pricing.

    The live Anthropic platform table lists Claude Sonnet 5 at $2 input / $10 output per million tokens (as named on the September 22 table — the current model at these same rates is Sonnet 5.5). Five-minute cache writes are $2.50. Cache reads are $0.20. Batch is $1 / $5.

    That is not Sonnet 4.6. Sonnet 4.6 (and Sonnet 4.5) — both legacy/retired models — stayed at $3 / $15. Do not average the two rows.

    On September 17 this desk published that Sonnet 5 intro $2 / $10 had ended August 31 and that standard list was $3 / $15. The official table on September 22 does not match that desk. Official page wins. Old → new on the live pages: Sonnet 5 $3 / $15 → $2 / $10.

    Seats did not move: Pro $20 monthly / $17 annual, Max 5x $100, Max 20x $200, Team Standard $20 annual / $25 monthly, Team Premium $100 annual / $125 monthly, Enterprise $20/seat plus API usage.

    Fable 5.1 remains $10 / $50 with cache reads at $0.25 (already logged September 19). Cursor individual seats remain Hobby free / Pro $20 / Pro+ $60 / Ultra $200.

    Updated in place: the four canonical pricing desks plus the Claude Code vs Cursor page.