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Claude Sonnet 5.5 is now available in Devin

Codeium ·

Summary: On FrontierCode 1.1, Sonnet 5.5 is a significant improvement from Sonnet 5 at 64.4%, surpassing even Fable 5.1 at extra high reasoning effort.

AI tools in this story: Claude

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Who reported “Claude Sonnet 5.5 is now available in Devin”?

Codeium, on 29 Sept 2026. The full article is at the source link on this page.

Which AI tools does this story mention?

Claude.