OpenAI Launches GPT-5.4 with Pro and Thinking Versions for Professional Work

Summary

OpenAI has released GPT-5.4, described as its most capable and efficient frontier model for professional work, available in both Pro and Thinking versions. The model achieved record scores across multiple benchmarks, including computer use benchmarks OSWorld-Verified and WebArena Verified, as well as an 83 percent score on OpenAI's GDPval test for knowledge work tasks. GPT-5.4 also took the lead on Mercor's APEX-Agents benchmark, which tests professional skills in law and finance. Mercor CEO Br