OpenAI has released GPT-5.4 — simultaneously its most capable frontier model and its most decisive statement yet that AI has crossed from "answering questions" into "doing the work." Scoring 83% on GDPval's 44-occupation knowledge work benchmark, achieving 75% on OSWorld computer-control tasks (surpassing the human benchmark of 72.4%), slashing hallucinations by 33%, introducing native computer use for the first time in a general-purpose model, and launching Tool Search to cut token costs 47% in large agent ecosystems — GPT-5.4 is not an incremental update. It is OpenAI's declaration that professional workflows now have a new default executor.

OpenAI has officially launched GPT‑5.3‑Codex on February 5, 2026, describing it as its most capable agentic coding model to date and 25% faster than the prior generation. The model combines the frontier coding performance of GPT‑5.2‑Codex with GPT‑5.2’s reasoning and professional knowledge, enabling longer-running workflows that involve research, tool use, and complex execution. OpenAI says GPT‑5.3‑Codex can iteratively build highly functional complex games and apps from scratch over the course of days, running autonomously over millions of tokens while users steer and interact without losing context.