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GPT-5

OpenAI, 7 Aug 2025.

Lab
OpenAI
Released
7 Aug 2025
Kind
Multimodal, Language modeling/generation
Training compute
6.6 × 10²⁵ FLOP
Parameters
Not disclosed
Capability index
150.0 (Epoch)
Task length at 50% success
3.4 h (METR)
Organisations
OpenAI
Country
United States

Data: Epoch AI (Creative Commons Attribution), releases too new for it from OpenRouter, and METR. Updated 25 Sep 2026.