小米 MiMo 提示智能体用户：多轮工具调用需保留 reasoning_content
Heads up, agent users！
小米 MiMo 官方提醒，在开启思考模式的多轮智能体会话中，若对话历史包含工具调用，后续用户轮次回传的带工具调用的 assistant 消息必须保留完整的 reasoning_content 字段，否则 API 会返回 400 错误。缺少该字段会导致模型上下文不完整，可能带来指令遵循变弱、幻觉增多和体验明显下降。受影响框架包括 TRAE、Cursor、Roo Code、Codex、GitHub Copilot CLI、Zed、AutoGen，受影响模型为 MiMo-V2.5-Pro、MiMo-V2.5、MiMo-V2-Pro、MiMo-V2-Omni、MiMo-V2-Flash，官方称正与维护者推进兼容更新。
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官方说明了 MiMo 思考模式在多轮智能体会话中的 reasoning_content 保留要求，可帮助开发者排查 400 报错与上下文缺失问题。
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Heads up, agent users！
If you're using Xiaomi MiMo with thinking mode: When thinking mode is enabled in a multi-turn agent session and the conversation history contains a tool call, any assistant message with tool calls passed back in subsequent user turns must preserve its full reasoning_content field — otherwise the API will return a 400 error.
Without it, the model's context is incomplete, which can lead to weaker instruction-following, more hallucinations, and a visibly degraded user experience. Missing reasoning = incomplete context = degraded reasoning quality.
Affected frameworks include TRAE, Cursor, Roo Code, Codex, GitHub Copilot CLI, Zed, AutoGen. We're actively working with the maintainers to push compatibility updates.
Affected models: MiMo-V2.5-Pro, MiMo-V2.5, MiMo-V2-Pro, MiMo-V2-Omni, MiMo-V2-Flash.
See docs(https://t.co/9v7oybaW26 )for more details.