GPT-5.4

GPT-5.4 is described as a frontier model aimed at complex professional work rather than casual chat, with a single design that pulls together stronger reasoning, coding, computer use, tool workflows, spreadsheet and document handling, and long-context API use. A third-party write-up frames it as a mainline release spanning ChatGPT, the API, and Codex, with a dedicated GPT-5.4 Thinking variant for harder tasks and a gpt-5.4-pro API tier alongside the standard gpt-5.4 endpoint. The intent is to let teams hand off multi-step work involving files, code, and live tools without orchestrating every step themselves.

The model's practical strength lies in agentic coding, computer-use automation, deep research, and long-horizon tool orchestration, with positioning aimed at finance, operations, consulting, legal, and go-to-market teams that work across documents, spreadsheets, and presentations. It is described as benefiting most users who run real workflows across files and tools, while casual users may not need its depth. Native desktop and browser interaction, paired with a roughly 1M-token-class that quick-info value window for long-document and enterprise use, are presented as the main differentiators for agent builders and automation teams.