AsOf

Claude Fable 5 · context window1M token context window

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

What the statuses mean

Valid from
2026-06-09
Valid until
still holds
Published
2026-06-09
Recorded by AsOf
2026-11-10
Checked
2026-11-10 · its source page states the value and the date
Confidence
0.70

Sources

“June 9, 2026 We’ve launched Claude Fable 5 ( claude-fable-5 ), our most capable model open to all customers, alongside Claude Mythos 5 ( claude-mythos-5 ) for Project Glasswing participants. Both models support a 1M token context window by default”— what the page says, read 2026-11-10

Cite this claim

Each form names the value, its as-of date (2026-06-09), 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 The URL never changes: a superseded claim stays at the same address.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 Fable 5 context window: 1M token context window", as of 2026-06-09. Claim clm_F3A82F1FEE81, https://asof.is/claim/clm_F3A82F1FEE81, accessed 2026-11-10. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-06-09.
APA
AsOf. (2026). Claude Fable 5 context window: 1M token context window (as of 2026-06-09) [Record clm_F3A82F1FEE81]. Retrieved November 10, 2026, from https://asof.is/claim/clm_F3A82F1FEE81 (source: https://platform.claude.com/docs/en/release-notes/overview#2026-06-09)
BibTeX
@misc{asof_clm_F3A82F1FEE81,
  author = {AsOf},
  title = {Claude Fable 5 context window: 1M token context window},
  year = {2026},
  howpublished = {\url{https://asof.is/claim/clm_F3A82F1FEE81}},
  note = {Claim clm\_F3A82F1FEE81, as of 2026-06-09; source: https://platform.claude.com/docs/en/release-notes/overview\#2026-06-09},
  urldate = {2026-11-10}
}

On the record

/claim/clm_F3A82F1FEE81.md/v1/claims/clm_F3A82F1FEE81submit a correction