o1 series

Each model's score on the Intelligence board (Intelligence Index) on the last day it was listed

1. o1Released Sep 12, 202415.2#290

• May 32026ResearchOpenAI's o1 just beat doctors at ER triage
• Jan 152026IndustryThinking Machines co-founders make a dramatic return to OpenAI
• Apr 182025AI modelsOpenAI's latest reasoning models are hallucinating more than ever
• Mar 182025AI toolsOpenAI adds direct PDF support to its API
• Mar 72025IndustryMicrosoft AI chief wants out of OpenAI’s shadow
• Feb 252025AI toolsMicrosoft makes Copilot Voice and Think Deeper unlimited for free