OpenAI has expanded the availability of its GPT-5.3-Codex model to third-party developers via API and Microsoft Foundry.

That's why OpenAI's push to own the developer ecosystem end-to-end matters in26. "End-to-end" here doesn't mean only better models. It means the ...

OpenAI has announced that Deep research in ChatGPT is now powered by GPT-5.2. Introduced last year, Deep research is an agentic capability that performs multi-step internet research inside ChatGPT for ...

On Thursday, OpenAI announced GPT-5 and three variants—GPT-5 Pro, GPT-5 mini, and GPT-5 nano—what the company calls its “best AI system yet,” with availability for some of the models across all ...

OpenAI upgrades ChatGPT Deep Research with GPT-5.2, adding advanced workflow controls, structured reports, visual charts, and ...