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Claude Sonnet 5.5 launch

AI summary

Written by AI from the official notes. Check them for exact details.

Claude Sonnet 5.5 has been launched as a faster and lower-cost model.

  • Claude Sonnet 5.5 is now available.
  • It complements Claude Opus 5.5.
  • Sonnet 5.5 offers faster performance.
  • Sonnet 5.5 is lower in cost.

Why it matters: Users looking for efficient and cost-effective AI solutions should consider Claude Sonnet 5.5.

Official notes on support.claude.comIntroducing Claude Sonnet 5.5

Full release notes

Claude Sonnet 5.5 launch

We just launched Claude Sonnet 5.5, the second model in our Claude 5.5 family. Sonnet 5.5 is a faster, lower-cost complement to Claude Opus 5.5. For more information, see our blog post: Introducing Claude Sonnet 5.5.