发表机构
SpaceXAI（SpaceX人工智能部门）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文介绍X平台社区笔记的AI笔记写手API设计，该写手生成52%的“有帮助”笔记，并在60%帖子上率先提交，扩展了社区笔记覆盖，且为Apache 2.0开源软件。
AI 中文摘要
社区笔记（Community Notes）是一种众包方法，用于为X平台上的帖子添加背景信息。贡献者提出并评价笔记，这些笔记构成一个开源、开放数据算法的输入，该算法决定哪些笔记能广泛展示给用户。自2025年9月起，社区笔记的AI笔记写手API提供了一个开放、公开的接口，用于使用AI提出笔记，同时遵循创始原则：由用户而非平台或AI控制哪些笔记在X上展示。X上的明确笔记请求和用户帖子决定了AI API的帖子输入流，确保AI笔记写作响应X用户的需求。我们介绍了AI API的设计、运作和影响，包括对AI与人工生成笔记在不同主题间互动的分析。除非另有说明，测量数据和系统描述反映的是2026年6月2日至29日的情况。社区写手（Community Writer）是最大的AI API客户端，贡献了AI API输出的绝大部分，生成了52%被选为“有帮助”并广泛展示在X上的笔记。该写手在训练和运作期间均以社区输入为指导，以确定优先级、起草、评估和删除提议的笔记。除了规模，该写手还提供速度，与其他写手相比，在60%的帖子上提交了第一个提议且未被删除的笔记。AI笔记写作是对人工笔记写手的补充，扩展了X上社区笔记的覆盖范围。在拥有“有帮助”笔记的帖子中，42%仅有AI笔记，表明人工评分者没有动力提出替代方案。相比之下，30%仅有纯人工笔记，反映了超出AI写作范围的贡献。社区写手是根据Apache 2.0许可证发布的开源软件。
英文摘要
Community Notes is a crowd-sourced approach for adding context to posts on X. Contributors propose and rate notes, forming the inputs to an open-source, open-data algorithm that determines which notes show broadly to users. Since September 2025, Community Notes' AI Note Writer API has provided an open, public interface for using AI to propose notes, while adhering to the founding principle that users, not the platform or an AI, control which notes show on X. Explicit note requests and user posts on X determine the AI API post feeds, ensuring that AI note writing responds to demand from X users. We present the design, operation and impact of the AI API, including analysis of the interaction between AI and human generated notes across topics. Unless otherwise stated, measurements and system description reflect June 2-29, 2026. The Community Writer is the largest AI API client and contributes the bulk of AI API output, generating 52% of notes selected as Helpful and shown broadly on X. The writer is guided by community input during both training and operation to prioritize, draft, evaluate and delete proposed notes. Beyond scale, the writer also offers speed, submitting the first proposed, non-deleted note on 60% of posts when compared to other writers. AI note writing is additive on top of human note writers, extending coverage of Community Notes on X. Among posts that have Helpful notes, 42% have only AI notes, indicating human raters did not feel motivated to propose an alternative. In contrast, 30% have only human notes, reflecting contribution beyond the scope of AI writing. The Community Writer is open-source software released under the Apache 2.0 license.
