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Anthropic's Claude Sonnet 5.5 nearly matches Opus 5.5 on benchmarks while costing up to 30 percent less per task

Anthropic has released Claude Sonnet 5.5, the second model in its Claude 5.5 family. It generates output more than 30 percent faster, costs up to 30 percent less per task, and nearly matches Opus 5.5 on knowledge-work benchmarks. On Terminal-Bench, a coding benchmark, the model jumps from 10.3 to 7…

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  1. 2026-09-28 18:02 · The Decoder
    Anthropic's Claude Sonnet 5.5 nearly matches Opus 5.5 on benchmarks while costing up to 30 percent less per task

More stories

  1. Introducing Claude Sonnet 5.5 on AWS — AWS Machine Learning Blog
  2. Anthropic releases Sonnet 5.5, which it calls a significantly cheaper, faster work partner — TechCrunch AI
  3. Opus 5.5 — r/ClaudeAI
  4. Claude Sonnet 5.5 now available on AI Gateway — Vercel Blog
  5. Optimizing my AI subscriptions: Claude Pro (Opus) vs. ChatGPT Plus vs. Perplexity Pro? — r/AI_Agents
  6. Anthropic releases Claude Sonnet 5.5 with the cyber limits it reserved for its best models — The Next Web
  7. Did Anthropic’s A.I. Really Make a Scientific Discovery on Its Own? — New York Times AI
  8. Anthropic launches Claude Sonnet 5.5 with near-Opus performance at half the price — The New Stack AI

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