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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.248

Bedrock requests and responses carry a service tier

You'll notice
Useful2 Signal3
Bedrock

Bedrock requests now send and read a service tier header.

What

On AWS Bedrock, both the single-shot and streaming model calls now send and read a service tier value via the X-Amzn-Bedrock-Service-Tier header. Only affects the Bedrock provider.

Evidence

X-Amzn-Bedrock-Service-Tier

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.248 →