fallback-credit changedbuild-with-claude/fallback-credit
Nearest release: v2.1.284, published an hour before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
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14 Aug 2026
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Recorded edits5to this page, all time
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622622 * **`fallback-credit-*`:** keep this header on both requests. The retry needs it to redeem the token.
623623
624624 <Note>
625 On models that include the 1M token context window by default, such as Claude Fable 5.1, Claude Fable 5, Claude Opus 5.5, Claude Opus 5, and Claude Opus 4.8, the `context-1m-2025-08-07` beta header has no effect. To keep the two requests identical, omit that header on both rather than sending it on one and not the other.
625 On models that include the 1M token context window by default, such as Claude Fable 5.1, Claude Fable 5, Claude Opus 5.5, Claude Opus 5, Claude Opus 4.8, Claude Sonnet 5.5, and Claude Sonnet 5, the `context-1m-2025-08-07` beta header has no effect. To keep the two requests identical, omit that header on both rather than sending it on one and not the other.
626626 </Note>
627627</Accordion>
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