INTRODUCING GPT-5.4

Summary from the TLDR Dev newsletter

OpenAI has released GPT-5.4, its most capable and efficient frontier model designed for professional work, now available in ChatGPT, the API, and Codex. This new version advances reasoning, coding, and agentic workflows, excelling in tasks involving spreadsheets, presentations, and documents with improved accuracy and reduced errors. GPT-5.4 also introduces native computer-use capabilities, allowing agents to operate across applications.