Just weeks after launching the more powerful GPT-5.4 model, the AI startup's new GPT-5.4 Mini model is positioned as a ‘smaller, cheaper’ alternative in cases where speed and cost matter the most. Meanwhile, GPT-5.4 Nano is positioned as the smallest and cheapest version of GPT-5.4 for areas where speed and cost are important. The ChatGPT maker is also positioning GPT-5.4 Mini as a ‘subagent’. Benchmark GPT-5.4 GPT-5.4 mini GPT-5.4 nano GPT-5 mini GPQA Diamond (Intelligence) 93.0% 88.0% 82.8% 81.6% SWE-bench Pro (Coding) 57.7% 54.4% 52.4% 45.7% OSWorld-Verified (Vision/CUA) 75.0% 72.1% 39.0% 42.0% Toolathlon (Tool-calling) 54.6% 42.9% 35.5% 26.9%Who can use GPT-5.4 Mini and Nano? GPT-5.4 Mini is available to all ChatGPT free and Go users starting from today.

Source: Mint March 18, 2026 06:13 UTC