waypoints.si The sky Every system The lead Countries Forecast revisions
GPT-4.5
OpenAI, 27 Feb 2025.
- Lab
- OpenAI
- Released
- 27 Feb 2025
- Kind
- Language, Language modeling/generation
- Training compute
- 3.8 × 10²⁶ FLOP
- Parameters
- Not disclosed
- Capability index
- 136.7 (Epoch)
- Organisations
- OpenAI
- Country
- United States
See it in the 3D sky Paper or announcement
Data: Epoch AI (Creative Commons Attribution), releases too new for it from OpenRouter, and METR. Updated 25 Sep 2026.