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AI summary
Written by AI from the official notes. Check them for exact details.Claude Opus 5.5 has been launched, offering improved performance at a lower cost.
- First model in the Claude 5.5 family
- Performs at Claude Fable 5.1 level
- Costs 40% less to run than Opus 5
Why it matters: Users looking for cost-effective AI solutions should consider upgrading to Claude Opus 5.5.
Full release notes
Claude Opus 5.5 launch
We just launched Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5. For more information, see our blog post: Introducing Claude Opus 5.5.