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Tools · Updated 20 Oct, 05:02 am IST

Amazon Bedrock adds structured JSON outputs for Anthropic Claude models

Image: AWS Machine Learning Blog

Why it matters for readers: It shows models can be constrained to return precise, machine-readable results instead of freeform text.

  • Structured outputs are available for all Anthropic Claude models where the model is offered on Amazon Bedrock.1
  • The capability works on both the bedrock-runtime APIs (Boto3) and the Messages API via the bedrock-mantle endpoint.1
  • Structured outputs use constrained decoding so the model avoids generating tokens that would violate a provided JSON schema, making outputs deterministic and schema-compliant.1
  • Practical use cases listed include extracting fields from earnings reports, parsing clinical notes into EHRs, enriching product catalogs, analysing contracts, and intelligent support ticket routing.1
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