Claude Opus 5.5 is available in the API 🚀

Anthropic released Claude Opus 5.5, and it is available through the Claude API.

The practical pitch is simple: lower typical token costs than Opus 5, plus a faster mode when response time matters more than squeezing out the last bit of reasoning.

What to check in your evals:

• Run the same tool-use and coding tasks against Opus 5.
• Measure latency separately for normal and faster mode.
• Track input and output tokens, not just the model's listed price.

A cheaper high-end model changes agent architecture decisions. Some workflows that needed routing to a smaller model may now fit under one stronger default.

[ Read More ] :
https://www.anthropic.com/claude/opus

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