# clm_4FFA03AA4E8C

subject: Claude (/record/claude.md)  
predicate: feature_added  
value: Extended thinking  
valid_from: 2025-02-24  
valid_to: null  
published: 2025-02-24  
recorded: 2026-10-28  
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  

> With the new Claude 3.7 Sonnet , users can toggle “extended thinking mode” on or off, directing the model to think more deeply about trickier questions 1 .

What https://www.anthropic.com/news/visible-extended-thinking says, word for word.

## Sources

- https://www.anthropic.com/news/visible-extended-thinking (primary, Anthropic, published 2025-02-24)

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