Sonnet 5 List Price Moved to $3 / $15 on September 1

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William Tygart

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I run a multi-site content operation on Claude and Notion with autonomous agents — and I write about what we do, including what breaks.

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Operator note. Verified September 17, 2026 against platform.claude.com/docs/en/about-claude/pricing.

Sonnet 5 is no longer $2 / $10 on the first-party API table. Anthropic published introductory pricing through August 31, 2026, then the standard rate: $3 per million input tokens and $15 per million output tokens starting September 1, 2026.

That is a 50% unit-price move on input and output versus the intro card. Sonnet 4.6 was already $3 / $15. The two mid-tier SKUs now share the same list. Cache writes follow the new input rate ($3.75 / MTok for 5-minute writes; $0.30 / MTok cache reads). Batch stays 50% off that list.

What did not move on this check:

  • Claude Pro $20/mo or $17/mo annual ($200 prepaid)
  • Max 5x $100/mo, Max 20x $200/mo
  • Team Standard $25 monthly / $20 annual; Premium $125 / $100
  • Haiku 4.5 $1 / $5; Opus family $5 / $25; Fable 5 $10 / $50
  • Cursor Hobby free, Pro $20, Pro+ $60, Ultra $200, Teams $40/user

If a workflow was budgeted on Sonnet 5 intro rates, the meter is now the same as Sonnet 4.6. Haiku 4.5 is still the cheap public list. Live desks: API rates, seats.

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