Claude Sonnet 5.5 is now available in Devin
By Steven Van ·
Devin cites a 64.4% FrontierCode 1.1 score for the model, plus Anthropic's figures of 30% faster output and up to 30% lower cost per task.
Devin now offers Claude Sonnet 5.5, which Devin's announcement says scores 64.4% on FrontierCode 1.1.
Benchmark result
Devin describes the 64.4% score as a significant improvement over Sonnet 5. It also says the score surpasses Fable 5.1 at extra high reasoning effort. FrontierCode measures how well models meet the standards of high-quality production codebases.
Speed and cost
Anthropic reports more than 30% faster output generation and up to 30% lower cost per task than Sonnet 5. Token pricing is unchanged.

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