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Anthropic releases Claude Sonnet 5.5 at unchanged token pricing

By The Likely · Updated Sep 28, 5:24 PM ET · Drawn from 3 sources · Written by AI, checked against sources

Anthropic shipped Sonnet 5.5 on September 28, 2026, holding API rates at $2 per million input and $10 per million output tokens while claiming 30% faster inference and lower per-task token consumption.

Why it mattersDevelopers gain Opus-level cybersecurity capabilities without paying higher token prices.

How we got here

  1. Anthropic made Sonnet 5's introductory pricing permanent, dropping plans to raise input and output token rates. Anthropic
  2. Anthropic launched Claude Sonnet 5.5 at the same input and output token prices as Sonnet 5. Ai
  3. Anthropic announced that Claude Haiku 5.5 would be added to the family soon, without providing a firm release date. Ai

What's likely next

  1. Anthropic said Claude Haiku 5.5, intended for high-volume and cost-sensitive uses, would join the Claude 5.5 family in the coming weeks; no firm date was announced.

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