GPT-5.4 Pro
OpenAI · 2026-03-05
GPT-5.4 Pro is OpenAI's frontier professional-tier model released on March 5, 2026, available to Pro and Enterprise plan subscribers. It integrates the coding strengths of GPT-5.3-Codex with improved agentic tool-use, long-context reasoning up to 1 million tokens, and reduced factual error rates compared to prior generations. It targets complex professional workflows spanning coding, document analysis, and multi-step agentic tasks.