# clm_88C0D7E932E0

subject: Claude (/record/claude.md)  
predicate: context_window  
value: 1M tokens  
valid_from: 2026-05-28  
valid_to: null  
published: 2026-05-28  
recorded: 2026-10-31  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-04  
checked: 2026-11-04 · its source page states the value and the date  

> May 28, 2026  We’ve launched Claude Opus 4.8 ( claude-opus-4-8 ), our most capable model. Claude Opus 4.8 supports a 1M token context window by default on the Claude API, Amazon Bedrock, Google Cloud, and Microsoft Foundry, 128k max output tokens

What https://platform.claude.com/docs/en/release-notes/overview#2026-09-22 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2026-05-28 (primary, Anthropic, published 2026-05-28)
- https://platform.claude.com/docs/en/release-notes/overview#2026-06-30 (primary, Anthropic, published 2026-06-30)
- https://platform.claude.com/docs/en/release-notes/overview#2026-09-01 (primary, Anthropic, published 2026-09-01)
- https://platform.claude.com/docs/en/release-notes/overview#2026-09-22 (primary, Anthropic, published 2026-09-22)
- https://platform.claude.com/docs/en/release-notes/overview#2026-07-24 (primary, Anthropic, published 2026-07-24)

## Supersedes

- [Claude](/record/claude.md) | context_window | 200k-token context window | valid 2026-04-30 to 2026-05-28 | conf 0.70 | superseded | superseded_by [clm_88C0D7E932E0](/claim/clm_88C0D7E932E0.md) | [clm_73ED3FBFED64](/claim/clm_73ED3FBFED64.md)

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