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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 v2.1.86 27 Mar 2026

Overage Credit Grant and Extra Usage Display

The extra usage billing display has been significantly enhanced with an overage credit grant system. Users may now see their available extra usage credit amount (e.g., "$5 in extra usage") along with the message "On us. Works on third-party apps · /extra-usage". The system fetches grant info from a new /overage_credit_grant API endpoint and caches it per-organization.

Evidence

Overage credit display (search for "On us. Works on third-party apps · /extra-usage") — LE6() at line ~424063

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

See this entry in the whole of v2.1.86 →