OpenAI has launched GPT-5.4 mini and nano models, expanding the capabilities of its GPT-5.4 system originally released in March 2023. The GPT-5.4 mini model is now available to Free and Go users, allowing them to utilize advanced features previously accessible only to paid subscribers. This model provides performance that approaches the original GPT-5.4 in several key areas, including reasoning and multimodal understanding.
The mini version can be accessed by selecting “Thinking” from ChatGPT’s plus menu for Free and Go users. For those with paid subscriptions, GPT-5.4 mini will serve as a fallback option when they reach their rate limit with the full GPT-5.4 model. OpenAI highlighted improvements in GPT-5.4 mini over its predecessor, GPT-5.0 mini, particularly in effectively interpreting non-text inputs like images and audio. It also features enhanced web-searching capabilities and operates more than twice as fast as GPT-5.0 mini.
In addition to GPT-5.4 mini, OpenAI has introduced the GPT-5.4 nano model, which targets speed and cost-efficiency for specific tasks like data classification and extraction. Unlike the mini version, GPT-5.4 nano is available exclusively through OpenAI’s API service and not within the chatbot interface. According to OpenAI, developers can utilize this model for delegating tasks to AI agents, with costs starting at $0.20 per million input tokens.
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