AsOf

Claude Fable 5.1 · featurethinking_mismatch_allowed

valid: Two independent sources agree, or a primary source states it: the record asserts this claim.asserted

What the statuses mean

Valid from
2026-09-14
Valid until
still holds
Published
2026-09-14
Recorded by AsOf
2026-11-08
Checked
2026-11-08 · its source page states the value and the date
Confidence
0.70

Sources

“With the thinking-binding-controls-2026-08-01 beta header, the input_transformations response field gains a second entry type, thinking_mismatch_allowed .”— what the page says, read 2026-11-08

Cite this claim

Each form names the value, its as-of date (2026-09-14), the day you read it (2026-11-09), the claim's stable URL and id and its primary source. The URL never changes: a superseded claim stays at the same address.

Plain text
AsOf. "Claude Fable 5.1 feature added: thinking_mismatch_allowed", as of 2026-09-14. Claim clm_F600C38A78DE, https://asof.is/claim/clm_F600C38A78DE, accessed 2026-11-09. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-09-14.
APA
AsOf. (2026). Claude Fable 5.1 feature added: thinking_mismatch_allowed (as of 2026-09-14) [Record clm_F600C38A78DE]. Retrieved November 9, 2026, from https://asof.is/claim/clm_F600C38A78DE (source: https://platform.claude.com/docs/en/release-notes/overview#2026-09-14)
BibTeX
@misc{asof_clm_F600C38A78DE,
  author = {AsOf},
  title = {Claude Fable 5.1 feature added: thinking\_mismatch\_allowed},
  year = {2026},
  howpublished = {\url{https://asof.is/claim/clm_F600C38A78DE}},
  note = {Claim clm\_F600C38A78DE, as of 2026-09-14; source: https://platform.claude.com/docs/en/release-notes/overview\#2026-09-14},
  urldate = {2026-11-09}
}

On the record

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