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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 v2.1.246

Usage accumulation records the pricing source alongside the model

Under the hood
Useful2 Signal3
Cost Tracking

Usage records now note where the price came from, and the SDK exposes that field.

What

Each accumulated usage record now stores a cost basis next to the provider and canonical model name, which is what the new SDK schema field exposes.

Details
  • The enum admits list, managed and unknown; the schema field is optional so older producers omit it.
Evidence

costBasis: a(["list", "managed", "unknown"])

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 v2.1.246 →