It has been a while since OpenAI expanded its model lineup after the massive GPT-5 release, but they just dropped a highly anticipated update tailored for speed and affordability: GPT-5.4 Mini and GPT-5.4 Nano.
GPT-5.4 Mini: The Speed Demon Available right now on the ChatGPT web interface and app, the Mini version is designed for rapid response. While it shows a slight degradation in complex reasoning compared to the full 5.4 model, its output speed is twice as fast. It is absolutely perfect for quick queries and real-time heavy workloads.
GPT-5.4 Nano: The Budget-Friendly API Model The Nano model is an API-exclusive release focused entirely on cost-efficiency. While its performance won't blow your mind for complex logic, its pricing is incredibly attractive for developers handling high-volume, simple tasks.
The Pricing Breakdown (per 1M Tokens):
- Nano API: $0.20 (Input) / $1.25 (Output)
- Mini API: $0.75 (Input) / $4.50 (Output)
For developers running 24/7 autonomous agents or managing bulk automated translations, the Nano model is a game-changer for cutting server overhead.
For more technical details, check out the OpenAI Model Release Page.
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