# clm_A68FBD12445C

subject: GPT-4.1 (/record/gpt-4-1.md)  
predicate: context_window  
value: up to 1M tokens  
valid_from: 2025-04-14  
valid_to: null  
published: 2025-04-14  
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  

> These new models feature improved instruction following, coding, and a larger context window (up to 1M tokens).

What https://developers.openai.com/api/docs/changelog#2025-04-14 says, word for word.

## Sources

- https://developers.openai.com/api/docs/changelog#2025-04-14 (primary, OpenAI, published 2025-04-14)

---

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