OpenAI teases “5.4” as reports point to a 1M+ token context window and “extreme reasoning,” amid scrutiny over its Pentagon deal.

OpenAI launches GPT-5.4, calling it its most capable and efficient AI model yet, with AI agents, computer control, improved reasoning, and a 1M-token context.

A repository platform built around AI models could reshape developer workflows and reduce OpenAI’s reliance on Microsoft’s ecosystem.

OpenAI launches GPT-5.4 across ChatGPT, API, and Codex with stronger reasoning, coding, and computer use capabilities.

GPT-5.4 is billed as "our most capable and efficient frontier model for professional work." ...

OpenAI's new GPT-5.4 clobbers humans on pro-level work in tests - by 83% ...