gpt-5.4-2026-03-05 vs mistral-small-2603

GPT-5.4 is OpenAI's most capable and efficient frontier model for professional work, combining advanced reasoning, coding, and native computer-use capabilities into a single model. It supports up to 1 million tokens of context, enabling agents to plan, execute, and verify tasks across long horizons. It is also the most factual model OpenAI has released, with individual claims 33% less likely to be false compared to GPT-5.2.

Mistral Small 4: a hybrid Apache 2.0 model consolidating Magistral reasoning, Devstral coding agents, and Mistral Small into one model with toggleable reasoning effort.