# GPT-4.1 timeline

entity: /record/gpt-4-1.md  
id: ent_gpt-4-1  


## 2025

- 2025-04-14 | context_window | up to 1M tokens | valid | [clm_A68FBD12445C](/claim/clm_A68FBD12445C.md)
- 2025-04-14 | model_release | gpt-4.1 | valid | [clm_0F5975E568EB](/claim/clm_0F5975E568EB.md)

## 2026

- 2026-10-14 | deprecated | gpt-4.1-2025-04-14 | valid | [clm_CD2CDDC451D7](/claim/clm_CD2CDDC451D7.md)

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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.