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Claude Opus 5.5 is now available in Kiro

Kiro

Claude Opus 5.5 is now available in Kiro. Users can download Kiro, or restart the Kiro IDE, CLI, or Crew, to check for the latest models.

Kiro says it is Anthropic’s most capable Opus model yet, with Fable 5.1-level performance on most work at 40% lower cost than Opus 5. Further details are at spr.ly/6014BGUAxA.