# clm_CD4401C7109B

subject: Claude (/record/claude.md)  
predicate: price  
value: $4 / $20 per MTok  
valid_from: 2026-09-22  
valid_to: 2026-10-07  
published: 2026-09-22  
recorded: 2026-10-31  
confidence: 0.70  
status: superseded  
assertable: true  
superseded_by: clm_3866B3B4DDB7  
last_updated: 2026-10-31  
checked: 2026-10-31 · its source page states the value and the date  

> September 22, 2026  We’ve launched Claude Opus 5.5 ( claude-opus-5-5 ), a model for long-running agentic coding and knowledge work. It has a 1M token context window by default, 128k max output tokens, and always-on adaptive thinking , at $4 / $20 USD per MTok

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#2026-09-22 (primary, Anthropic, published 2026-09-22)

## Supersedes

- [Claude](/record/claude.md) | price | $10 / $50 per MTok | valid 2026-09-01 to 2026-09-22 | conf 0.70 | superseded | superseded_by [clm_CD4401C7109B](/claim/clm_CD4401C7109B.md) | [clm_D102F6FB78D0](/claim/clm_D102F6FB78D0.md)

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