OpenAI launches GPT-5.4 with Pro and Thinking versions
Summary
OpenAI released GPT-5.4, a new AI model available in standard, reasoning (GPT-5.4 Thinking), and high-performance (GPT-5.4 Pro) versions, featuring a context window (the amount of text an AI can consider at once) up to 1 million tokens and improved efficiency. The model achieved record benchmark scores and is 33% less likely to make individual claim errors compared to its predecessor. OpenAI also introduced Tool Search, a new system that lets the API version look up tool definitions as needed rather than loading all definitions upfront, reducing token usage and costs for systems with many available tools.
Solution / Mitigation
OpenAI introduced Tool Search, described as a new system that "allows models to look up tool definitions as needed, resulting in faster and cheaper requests in systems with many available tools," replacing the previous method where system prompts would lay out all tool definitions upfront.
Classification
Affected Vendors
Related Issues
Original source: https://techcrunch.com/2026/03/05/openai-launches-gpt-5-4-with-pro-and-thinking-versions/
First tracked: March 5, 2026 at 03:00 PM
Classified by LLM (prompt v3) · confidence: 95%