GPT 5.4 is now on AI Gateway (opens in new tab)

# GPT 5\.4 is now on AI Gateway **Published:** March 5, 2026 | **Authors:** Walter Korman, Rohan Taneja, Jerilyn Zheng --- GPT-5.4 and GPT-5.4 Pro are now available on AI Gateway. This model brings the agentic and reasoning leaps from GPT-5.3-Codex to all domains. This includes knowledge work like reports, spreadsheets, presentations, and analysis in addition to coding. It handles complex multi-step workflows more reliably, including tasks that involve tools, research, and pulling from mu...