o-series models

o3-deep-research and o4-mini-deep-research released, plus webhooks and cheaper web search

OpenAI · o3-deep-research · o4-mini-deep-research

Generally Available: New fine-tuning capabilities in Microsoft FoundryGA

Azure · o4-mini

o3 and o4-mini reasoning models added, and Codex CLI launchedGA

OpenAI · o3 · o4-mini

o1-pro released, a version of o1 that uses more compute for hard problems

OpenAI · o1-pro