AsOf

Claude Sonnet 5 · feature removedmanual extended thinking

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

What the statuses mean

Valid from
2026-06-30
Valid until
still holds
Published
2026-06-30
Recorded by AsOf
2026-11-10
Checked
2026-11-10 · its source page states the value and the date
Confidence
0.70

Sources

“manual extended thinking ( thinking: {type: "enabled", budget_tokens: N} ) is removed and returns a 400 error (it was deprecated on Sonnet 4.6)”— what the page says, read 2026-11-10

Cite this claim

Each form names the value, its as-of date (2026-06-30), the day you read it (2026-11-10), 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 The URL never changes: a superseded claim stays at the same address.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 Sonnet 5 feature removed: manual extended thinking", as of 2026-06-30. Claim clm_032E0FE3CE1C, https://asof.is/claim/clm_032E0FE3CE1C, accessed 2026-11-10. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-06-30.
APA
AsOf. (2026). Claude Sonnet 5 feature removed: manual extended thinking (as of 2026-06-30) [Record clm_032E0FE3CE1C]. Retrieved November 10, 2026, from https://asof.is/claim/clm_032E0FE3CE1C (source: https://platform.claude.com/docs/en/release-notes/overview#2026-06-30)
BibTeX
@misc{asof_clm_032E0FE3CE1C,
  author = {AsOf},
  title = {Claude Sonnet 5 feature removed: manual extended thinking},
  year = {2026},
  howpublished = {\url{https://asof.is/claim/clm_032E0FE3CE1C}},
  note = {Claim clm\_032E0FE3CE1C, as of 2026-06-30; source: https://platform.claude.com/docs/en/release-notes/overview\#2026-06-30},
  urldate = {2026-11-10}
}

On the record

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