# GPT-4.1 nano timeline

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


## 2025

- 2025-04-14 | model_release | gpt-4.1-nano | valid | [clm_10E3D4744E71](/claim/clm_10E3D4744E71.md)

## 2026

- 2026-04-22 | deprecated | gpt-4.1-nano | valid | [clm_EA9D392DF52E](/claim/clm_EA9D392DF52E.md)
- 2026-10-23 | retired | gpt-4.1-nano | valid | [clm_4B8049CC7FF3](/claim/clm_4B8049CC7FF3.md)

---

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