# clm_BBC2EB212A86

subject: GPT-4 (/record/gpt-4.md)  
predicate: model_release  
value: [GPT-4.5](/record/gpt-4-5.md)  
valid_from: 2025-02-27  
valid_to: null  
published: 2025-02-27  
recorded: 2026-11-03  
confidence: 0.50  
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  

> Feb 27 Feature GPT-4.5 v1/chat/completions v1/assistants v1/batch Released a research preview of GPT-4.5 —our largest and most capable chat model yet.

What https://developers.openai.com/api/docs/changelog#2025-02-27 says, word for word.

## Sources

- https://developers.openai.com/api/docs/changelog#2025-02-27 (primary, OpenAI, published 2025-02-27)

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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.