AsOf

Claude Sonnet 4 · context window1M token

superseded: A later claim replaced it: it keeps its end date and a pointer to the claim that replaced it, and is never deleted.

What the statuses mean

Superseded: a later claim replaced it. It was the record's answer for the dates it held.

Valid from
2025-08-12
Valid until
2026-04-30
Published
2025-08-12
Recorded by AsOf
2026-11-13
Checked
2026-11-14 · its source page states the value and the date, as read by an AI model
Confidence
0.70

Sources

“August 12, 2025 We’ve launched beta support for a 1M token context window in Claude Sonnet 4 on the Claude API and Amazon Bedrock.”— what the page says, read 2026-11-14

Cite this claim

Each form names the value, its as-of date (2025-08-12), the day you read it (2026-11-14), 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 The URL never changes: a superseded claim stays at the same address.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 4 context window: 1M token", as of 2025-08-12 (until 2026-04-30). Claim clm_5045E2C6B4ED, https://asof.is/claim/clm_5045E2C6B4ED, accessed 2026-11-14. Source: https://platform.claude.com/docs/en/release-notes/overview#2025-08-12.
APA
AsOf. (2025). Claude Sonnet 4 context window: 1M token (as of 2025-08-12 (until 2026-04-30)) [Record clm_5045E2C6B4ED]. Retrieved November 14, 2026, from https://asof.is/claim/clm_5045E2C6B4ED (source: https://platform.claude.com/docs/en/release-notes/overview#2025-08-12)
BibTeX
@misc{asof_clm_5045E2C6B4ED,
  author = {AsOf},
  title = {Claude Sonnet 4 context window: 1M token},
  year = {2025},
  howpublished = {\url{https://asof.is/claim/clm_5045E2C6B4ED}},
  note = {Claim clm\_5045E2C6B4ED, as of 2025-08-12 (until 2026-04-30); source: https://platform.claude.com/docs/en/release-notes/overview\#2025-08-12},
  urldate = {2026-11-14}
}

On the record

/claim/clm_5045E2C6B4ED.md/v1/claims/clm_5045E2C6B4EDsubmit a correction