Post by OpenAI Developers on X
OpenAI Developers@OpenAIDevs
XMeet GPT-5.1-Codex-Max, our latest frontier agentic coding model, available in Codex starting today.
It’s faster, more capable and token-efficient, and able to work persistently on long tasks with built-in compaction abilities.
2.7K likes97 repliesPosted Nov 19, 2025