GPT-5.4
GPT-5.4 is OpenAI’s March 2026 iteration of GPT-5, focusing on enhanced Thinking mode capabilities for complex reasoning tasks. The model pushes further on competitive coding, mathematical olympiad problems, and multi-step scientific analysis, building on the agentic foundation of GPT-5.2 with deeper tool integration and improved chain-of-thought transparency. GPT-5.4 better surfaces intermediate reasoning steps, making its problem-solving process more auditable for developers and enterprises. Available to ChatGPT Plus and Pro subscribers and via the OpenAI API.
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