feat(anthropic, amazon-bedrock): v5 expose anthropicBeta to downstream providers#13059
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sylviezhang37 merged 5 commits intorelease-v5.0from Mar 4, 2026
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packages/amazon-bedrock/src/anthropic/bedrock-anthropic-provider.test.ts
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…roviders (#13066) <!-- Welcome to contributing to AI SDK! We're excited to see your changes. We suggest you read the following contributing guide we've created before submitting: https://github.com/vercel/ai/blob/main/CONTRIBUTING.md --> ## Background <!-- Why was this change necessary? --> `amazon-bedrock/anthropic` requires `anthropic_beta` in its request body to enable extended capabilities for anthropic models, like 1M context (context-1m-2025-08-07) and fine-grained tool streaming (fine-grained-tool-streaming-2025-05-14). ## Summary <!-- What did you change? --> - `anthropic`: added `anthropicBeta` and forwarded to downstream providers via transformRequestBody - `amazon-bedrock`: receive betas passed from upstream - `v5` changes here: #13059 ## Manual Verification <!-- For features & bugfixes. Please explain how you *manually* verified that the change works end-to-end as expected (excluding automated tests). Remove the section if it's not needed (e.g. for docs). --> - added example scripts with verification checks ## Checklist <!-- Do not edit this list. Leave items unchecked that don't apply. If you need to track subtasks, create a new "## Tasks" section Please check if the PR fulfills the following requirements: --> - [x] Tests have been added / updated (for bug fixes / features) - [x] Documentation has been added / updated (for bug fixes / features) - [x] A _patch_ changeset for relevant packages has been added (for bug fixes / features - run `pnpm changeset` in the project root) - [x] I have reviewed this pull request (self-review)
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Background
amazon-bedrock/anthropicrequiresanthropic_betain its request body to enable extended capabilities for anthropic models, like 1M context (context-1m-2025-08-07) and fine-grained tool streaming (fine-grained-tool-streaming-2025-05-14).Summary
anthropic: addedanthropicBetaand forwarded to downstream providers via transformRequestBodyamazon-bedrock: receive betas passed from upstreamI also explored handling this gap in
amazon-bedrockinstead (see this draft PR if you're curious). Ultimately I think this is the cleanest solution. If we want to allow bothanthropicandbedrocknamespaces, we can handle this on the Gateway / client side via better education.Manual Verification
Checklist
pnpm changesetin the project root)Future Work
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