🪦 Dead
GPT-4o (API: 2024-05-13 & 2024-08-06)
Model deprecation · Forced Auto-upgrade · shut down March 31, 2026
- Born
- Died
- Lifespan
- 1y 10m
- Cause of death
- Forced Auto-upgrade
- Killed by
- OpenAI
- Type
- Model
The original GPT-4o API snapshots were auto-upgraded to GPT-5.1 when they retired. Developers who relied on specific model behavior, fine-tuning, or output consistency were forced into a blind migration with no rollback option.