Post by OpenAI Developers on X
OpenAI Developers@OpenAIDevs
XGPT-5.4 is here.
Native computer-use capabilities.
Up to 1M tokens of context in Codex and the API.
Best-in-class agentic coding for complex tasks.
Scalable tool search across larger ecosystems.
More efficient reasoning for long, tool-heavy workflows.
t.co
6.5K likes328 repliesPosted Mar 5, 2026