O3-pro is out now:

https://techcrunch.com/2025/06/10/openai-releases-o3-pro-a-souped-up-version-of-its-o3-ai-reasoning-model/
https://natesnewsletter.substack.com/p/o3-pro-is-out-and-its-easily-the
https://www.latent.space/p/o3-pro

>O3-pro also beats Anthropic’s recently released Claude 4 Opus on GPQA Diamond, a test of PhD-level science knowledge.