"OpenAI says 5.4 mini offers better performance than GPT-5.0 mini in a few different key areas, including reasoning, multimodal understanding and tool use. That means 5.4 mini is better at parsing non-text inputs such as images and audio, and has a more nuanced understanding of how to do things like search the web. It does all of this while running more than twice as fast as its predecessor."
"As a Free or Go user, you can access 5.4 mini by selecting "Thinking" from ChatGPT's plus menu. For paid users, the model is the new fallback for when you've hit your rate limit with 5.4 proper."
"As for GPT-5.4 nano, OpenAI says it's ideal for tasks such as data classification and extraction where speed and cost-efficiency are top of mind. The company envisions developers using more advanced models to delegate tasks to AI agents running GPT-5.4 nano, and that's reflected in the cost of the new model, which OpenAI has priced starting at $0.20 per million input tokens."
OpenAI has released two new models following GPT-5.4: GPT-5.4 mini and GPT-5.4 nano. GPT-5.4 mini is available to Free and Go users through ChatGPT's Thinking menu and serves as a fallback for paid users exceeding rate limits. It delivers better performance than GPT-5.0 mini in reasoning, multimodal understanding, and tool use, while running twice as fast. GPT-5.4 nano is exclusively available through the API for developers, designed for data classification and extraction tasks requiring speed and cost-efficiency. Both models emphasize professional applications including programming and data analysis, with nano priced at $0.20 per million input tokens.
Read at Engadget
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