GPT-5.4 mini
OpenAI Releases GPT-5.4 mini and nano: Faster Small Models for High-Volume Workloads
OpenAI released GPT-5.4 mini and GPT-5.4 nano on March 9, 2026, offering faster and cheaper alternatives to the full GPT-5.4 model. GPT-5.4 mini runs more than 2x faster than GPT-5 mini and costs $0.75 per 1M input tokens.