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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 v2.1.239

Cost figures apply a 1.1x factor for US-region inference

You'll notice
Useful4 Signal4
Cost Reporting

Cost figures multiply by 1.1 for US-region requests, so reported spend rises.

What

Reported per-request cost now multiplies the token-derived subtotal by 1.1 when the API says the request was served in the US region, and by 1 otherwise. The web search fee is added afterwards and is not multiplied. Dollar figures in cost and usage reporting will be higher for US-region traffic than in previous builds.

Details
  • The region comes from an inference_geo field on the API response, so this is decided by the server, not by any client setting or flag.
  • The field is carried through the helper that normalises usage records and defaults to an empty string when absent, which yields the 1x factor.
Evidence

inference_geo

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 v2.1.239 →