# clm_B0A76C715E76

subject: DeepSeek-R1 (/record/deepseek-r1.md)  
predicate: model_release  
value: DeepSeek-R1-0528  
valid_from: 2025-05-28  
valid_to: null  
published: no source on record carries a date  
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  

> Date: 2025-05-28 deepseek-reasoner deepseek-reasoner Model Upgraded to DeepSeek-R1-0528

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

## Sources

- https://api-docs.deepseek.com/updates (primary, DeepSeek (API docs change log))

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.