OpenAI now offers faster GPT 5.4 mini and nano models – for users of the free version of ChatGPT

Users of the free version of ChatGPT now have access to AI capabilities nearly on par with the flagship models thanks to OpenAI's new GPT-5.4 mini

This is one of two compact models introduced this week that deliver responses more than twice as fast as their predecessors. Mini improves programming speed and performance, while Nano focuses on low latency and cost-efficiency.

GPT-5.4 mini is available to free ChatGPT users via the "Thinking" feature in the free tier.