Gate News 消息，3 月 18 日，OpenAI 发布 GPT-5.4 mini 和 GPT-5.4 nano 两款新模型，面向 Agent、编程和多模态工作流场景。GPT-5.4 mini 的 API 定价为输入 $0.75、输出 $4.50（每百万 token），是上一代 GPT-5 mini 的 2.25 至 3 倍；GPT-5.4 nano 定价为输入 $0.20、输出 $1.25，最高达前代的 4 倍。性能方面，GPT-5.4 mini 在 SWE-Bench Pro 编程基准测试中达到 54.4%，接近旗舰模型 GPT-5.4 的 57.7%，大幅超越前代 GPT-5 mini 的 45.7%。两款模型均支持 40 万 token 上下文窗口，mini 运行速度是前代的两倍以上，支持计算机控制、工具调用和网页搜索等功能。ChatGPT 免费版和 Go 用户将首次获得由 GPT-5.4 mini 驱动的推理功能（Thinking）。mini 已同步上线 GitHub Copilot 和 Codex，在 Codex 中仅消耗 GPT-5.4 配额的 30%。nano 仅通过 API 提供，适用于分类、数据提取等轻量任务。
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