US EditionI Tested the New ChatGPT-5.4 Mini and Nano Models — and I Didn’t Expect Them to Be This Powerful
OpenAI's new lightweight models improve coding and automation efficiency for free and paid users, with Mini accessible via ChatGPT's Thinking option and Nano aimed at developers.
- On March 5, 2026, OpenAI introduced GPT-5.4 Mini and GPT-5.4 Nano, integrating them into ChatGPT via a new Thinking option instead of model selection.
- Designed for speed and lower cost, GPT-5.4 Mini and GPT-5.4 Nano target coding, automation and multi-agent workflows, following the flagship GPT-5.4 and replacing the earlier Mini with major upgrades.
- Using multi-step prompts, the TechRadar reviewer found the Thinking tool produced more detailed answers and that mini and nano often matched the full GPT-5.4 while running faster.
- Nano is positioned as the cheapest option, with GPT-5.4 Mini priced below the flagship, lowering costs for developers and users, while OpenAI signaled possible changes to paid subscription plans.
- Across platforms, GPT-5.4 Mini is available in ChatGPT, the API, and Codex, while GPT-5.4 Nano targets developers via the API for high-volume and sub-agent workflows to improve efficiency.
13 Articles
13 Articles
OpenAI GPT-5.4 Mini & Nano: Faster, Cheaper AI Models Explained
The release of the GPT-5.4 Mini and GPT-5.4 Nano models represents the next steps in developing AI systems similar to GPT-5.4 as a result of feedback from customers regarding the desire to move towards practical applications for AI. The performance of the models is greatly enhanced through reduced latency and price, therefore expanding the number […]
OpenAI has released two new compact language models with GPT-5.4 mini and GPT-5.4 nano. The AI systems trimmed to efficiency and speed are aimed at developers. The cuts in intelligence are surprisingly low. (Continue reading)
OpenAI launches its new GPT-5.4 mini model for tasks that require fast and responsive artificial intelligence.
By launching GPT-5.4 mini for chatbot and GPT-5.4 nano for API, OpenAI expands the uses of generative AI to the general public and professionals.
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