# clm_2C996C4A2C4D

subject: Anthropic (/record/anthropic.md)  
predicate: model_release  
value: Claude Opus 4.1  
valid_from: 2025-08-05  
valid_to: null  
published: 2025-08-05  
recorded: 2026-10-31  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-10-31  
checked: 2026-10-31 · its source page states the value and the date  

> August 5, 2025 Claude Opus 4.1 Claude Opus 4.1 (an incremental update to Opus 4) brings enhanced performance as our most capable model for complex reasoning, analysis, and creative tasks.

What https://support.claude.com/en/articles/12138966-release-notes#2025-08-05 says, word for word.

## Sources

- https://support.claude.com/en/articles/12138966-release-notes#2025-08-05 (primary, Anthropic, published 2025-08-05)

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