GPT 5.4 Nano High is better than Opus and Sonnet at Planning
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GPT 5.4 Nano High 在通过 API 使用时，被认为在创建功能性实施计划、分析和提出解决方案方面表现出色，甚至优于大型模型。用户可以通过设置高详细程度和高推理级别（非超高），以低廉的成本体验其在代码分析和提案方面的强大能力。据称，Nano High 在非代理聊天模式下连接 API 并附带代码文件时，能有效处理任务，其性能超越了所有开源模型。
Believe it or not, Nano via the API (not in Codex or as an agent) is an absolute beast at creating functional implementation plans, as well as analyzing or proposing solutions better than the larger models.
Don't just take my word for it. It's cheap—just drop $5 on credits, set the verbosity to High and the reasoning to High (not Xhigh), and get ready to watch it completely destroy any open-source model out there in code analysis and proposals, all for just a few pennies.
Set up a non-agentic chat connected to the API, attach your code files, give it a task, and watch the magic happen. 10/10.