Claude Opus 5.5 is now on the Claude Platform 🚀

Anthropic introduced Claude Opus 5.5, a lower-cost frontier model available in Claude Code and through the Claude Platform.

That matters if your agent workload has been split between a high-end model for hard tasks and cheaper models for everything else. A lower-cost Opus tier can change where that handoff happens.

What to check:

• Run your existing eval set, not a few cherry-picked prompts.
• Measure tool-call accuracy and recovery after a failed call.
• Compare total agent cost: tokens, retries, and human review time.

For Claude Code users, model choice is now a practical repo-level config decision, not just a benchmark chart.

[ Blog ] :
https://www.anthropic.com/claude-opus-5-5

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