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Moving from Claude Sonnet 4.6 to 5.5 on Bedrock: What Broke, What Changed, and What It Cost

I recently moved a structured-extraction pipeline from Claude Sonnet 4.6 to Sonnet 5.5 on Amazon Bedrock. On paper it is a model ID change: the same family, a lower price per token, better benchmark scores. In practice, some requests that worked on 4.6 were rejected, one kind of request came back e…

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  1. 2026-11-12 15:22 · DEV Community — AI
    Moving from Claude Sonnet 4.6 to 5.5 on Bedrock: What Broke, What Changed, and What It Cost

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