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    "body": "GPT-4o 是 OpenAI 于 2024 年 5 月 13 日发布的多模态旗舰模型，单一模型端到端处理文本、视觉与音频。[^s1]\n\n## 发布背景\n发布时上下文窗口为128K tokens，最大输出为16,384 tokens，API 标识为 gpt-4o。[^s1]\n“o”代表 omni，单一模型端到端处理文本、视觉与音频，发布时称比 GPT-4 Turbo 快 2 倍、API 价格低 50%，并向 ChatGPT 免费用户开放。[^s1]\n\n## 定价与获取\n每百万 token 输入 2.50 美元、输出 10.00 美元。[^s1]\n\n## 性能表现\n以下为OpenAI公布的自家评测结果，尚未经独立复现。[^s1]\n- MMLU：88.7%（高于 GPT-4 的 86.5%）[^s1]\n- HumanEval：90.2%（高于 GPT-4 的约 67.0%）[^s1]\n- MATH：76.6%（高于 GPT-4 的约 52%）[^s1]\n- GPQA Diamond：53.6%（OpenAI 发布时公布的文本评测之一）[^s1]\n\n## 主要特点\n- ChatGPT 中已于 2026-02-13 退役；API 已于 2026-10-14 弃用，gpt-4o-2024-08-06 与 gpt-4o-2024-11-20 快照定于 2027-01-14 关闭，官方指定替代为 gpt-6-luna；最初的 gpt-4o-2024-05-13 快照已于 2026-10-23 关闭。[^s1]\n- 知识截止为 2023 年 10 月，上下文窗口 128K tokens，最大输出 16,384 tokens。[^s1]\n\n## 定位与后续\n接替 GPT-4 Turbo 的 OpenAI 2024 年旗舰多模态语言模型，后被 GPT-5 系列与 GPT-4.1 接替，API 官方指定继任为 GPT-6 Luna。 其前代为[[work_gpt_4_turbo|GPT-4 Turbo]]。[^s1]",
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