# clm_38B805C02EDD

subject: DeepSeek-V3.1 (/record/deepseek-v3-1.md)  
predicate: context_window  
value: 128K context  
valid_from: 2025-08-21  
valid_to: null  
published: 2025-08-21  
recorded: 2026-11-04  
confidence: 0.95  
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  

> deepseek-reasoner → thinking mode 🧵 128K context for both

What https://api-docs.deepseek.com/news/news250821 says, word for word.

## Sources

- https://api-docs.deepseek.com/news/news250821 (primary, DeepSeek, published 2025-08-21)

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