OpenAI has released GPT-5.4 mini and nano, two smaller and faster variants of GPT-5.4 optimized for high-volume, latency-sensitive workloads. GPT-5.4 mini runs more than 2x faster than GPT-5 mini while approaching GPT-5.4 performance on benchmarks like SWE-Bench Pro and OSWorld-Verified. GPT-5.4 nano is the cheapest option,

5m read timeFrom openai.com
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