# AWS adds schema-constrained Claude responses to both Bedrock endpoints

_Published Monday, October 19, 2026 at 7:37 PM EDT · AI · Latest · Tier 2 — Notable_

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AWS says structured outputs are now generally available for all Anthropic Claude models wherever they are available on Amazon Bedrock's bedrock-runtime and bedrock-mantle endpoints. The feature constrains generated tokens to produce JSON matching a supported schema, helping developers extract data and pass structured information to applications.

It supports batch inference and streaming responses, plus cross-Region inference on bedrock-runtime. Strict tool use on bedrock-mantle constrains tool arguments to their declared schemas.

The guarantees have limits: refusals and token limits can produce nonconforming responses. Numerical bounds and string-length constraints are not enforced during generation and require application validation. New schemas also incur compilation overhead; compiled grammars are cached for 24 hours.

## Sources

- [Artificial Intelligence](https://aws.amazon.com/blogs/machine-learning/structured-outputs-for-anthropic-claude-models-on-amazon-bedrock/)

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Canonical: https://techandbusiness.org/newswire/z6BkhslL6KzXRVQDiMjVfh
Published: 2026-10-19T23:37:05.365Z
Story chronology: 2026-10-19T23:32:19.000Z
Retrieved: 2026-10-20T01:45:58.582Z
Publisher: Tech & Business (techandbusiness.org)