OpenAI releases GPT-5.4 mini and nano AI models for developers
OpenAI just released two highly efficient AI models. The new GPT-5.4 mini and nano variants deliver massive speed upgrades for developers handling complex coding workflows.
OpenAI announced the immediate availability of the GPT-5.4 mini model today. The company integrated this compact AI directly into ChatGPT and its Codex coding environment. A smaller nano variant is also available exclusively through the developer API.
Key Takeaways:
- The core performance: GPT-5.4 mini delivers more than twice the inference speed of the previous generation. The model achieves a 54.4 percent score on the demanding SWE-Bench Pro software engineering evaluation.
- The massive context: The mini model supports a 400,000 token context window. This enormous capacity allows the AI to process massive codebases and document histories in a single prompt.
- The agent architecture: These models are heavily optimized for parallel execution. Developers can use a larger model for complex planning. They can then deploy these smaller models to execute parallel subtasks efficiently.
- The API pricing: The pricing structure targets high-volume enterprise applications. The mini variant costs $0.75 per million input tokens. The nano model costs just $0.20 per million input tokens.
The Bottom Line: OpenAI built these highly optimized smaller models to dominate high-volume API workloads and drastically reduce developer costs.
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