OpenAI has launched GPT-5.4, its latest and most advanced model, designed to enhance professional work efficiency. Available in ChatGPT, API, and Codex, GPT-5.4 integrates cutting-edge advancements in reasoning, programming, and agent-based workflows. The model builds on the programming capabilities of GPT-5.3-Codex, offering improved performance in tools, software environments, and tasks involving spreadsheets, presentations, and documents. The release of GPT-5.4 was anticipated by ChainThink's prediction market channel PolyBeats, which detected insider activity prior to the official announcement. Five accounts invested $12,400 betting on the release before March 5, with a market probability of 82%. Additionally, six accounts that previously bet on the release of GPT-5.3 before March 8 have profited, including one account that invested $200 on the March 5 release of GPT-5.4.