Claude Fable 5 Pricing and Access (2026)

Claude Fable 5 (claude-fable-5) is Anthropic’s most capable widely released model, built for the most demanding reasoning and long-horizon agentic work. On the Claude API it is priced at $10 per million input tokens and $50 per million output tokens — double the rate of Claude Opus 4.8 — with a 1M-token context window and up to 128K output tokens per request. It reached general availability on June 9, 2026. The verified pricing and access details are below.

Pricing at a glance

All figures below are from Anthropic’s official pricing and models pages. Prices are in USD per million tokens (MTok). Fable 5 includes the full 1M-token context window at standard pricing — there is no long-context premium.

How Fable 5 compares to Opus, Sonnet, and Haiku

Fable 5 sits at the top of Anthropic’s lineup, a tier above the Opus models. The per-token cost difference is the clearest way to see where it fits.

Where you can use Fable 5

At general availability, Fable 5 is offered across Anthropic’s first-party API and all major cloud platforms, plus claude.ai subscription plans (subject to the access note below). The model IDs differ by platform.

Consumer-plan access and the promotional window

For claude.ai subscribers, Anthropic launched Fable 5 with a time-limited promotion rather than a permanent plan inclusion. From June 9 through June 22, 2026, Fable 5 was included on the Pro, Max, Team, and seat-based Enterprise plans at no extra charge. During that window, Anthropic’s documentation states that Fable 5 usage “counts toward your plan’s usage limits, and you won’t be charged anything extra,” but that it draws from those limits “at a higher rate than other models.” The Free plan was explicitly excluded.

Anthropic’s announced plan was that after June 22, 2026, Fable 5 would no longer be included in plan usage limits, and continued use on claude.ai would require usage credits — a pay-as-you-go balance for usage beyond what a plan includes.

Integration notes that affect cost and handling

Fable 5 differs from the Opus, Sonnet, and Haiku models in a few ways that matter when you wire it into an application. It ships with safety classifiers that can decline a request: when that happens, the Messages API returns stop_reason: "refusal" as a successful HTTP 200 response, not an error. You are not billed for a request that is refused before any output is generated, and Anthropic provides server-side, client-side, and manual fallback paths to retry on another Claude model. Adaptive thinking is always on (thinking: {"type": "disabled"} is not supported), and the raw chain of thought is never returned — thinking.display controls whether thinking blocks contain a summary or are empty. Fable 5 also uses the tokenizer introduced with Opus 4.7, which can produce roughly 30–35% more tokens for the same text than older models, so re-baseline your token counts rather than assuming parity with earlier Claude models.