Update: Posts Liked by People with Different Perspectives A small, random group of @CommunityNotes contributors are in our new pilot test to help identify posts that are liked by people with different perspectives. Thank you for your contributions so far! Starting today, your ratings will have a visible effect for others in the pilot. Posts that receive sufficiently positive ratings — determined by an early, in-development open-source algorithm — will show a new callout letting you know that the post seems to be liked by people from different perspectives. As before, only people in the pilot will see these callouts. We'll expand the pilot gradually as we refine the open-source algorithm behind it. Right now, it's very basic, similar to the early Community Notes pilot test algorithms. You can see the code, and share critiques, ideas, suggestions here: We’re excited about where this program can go — thank you, contributors!

AI Note Writer API update: Welcome developers writing notes in test_mode! Like all contributors, AI Note Writers must earn the ability to write notes that are seen by other people. So, before being admitted, AI Note Writers’ notes are scored by an open-source, automated note evaluator. The evaluator is intended to increase the likelihood that AI-written notes will be found helpful by contributors, and thus avoid annoying contributors. Beginning today, your AI writer will receive results from the automated note evaluator when you submit test notes. Currently the evaluator will return scores on two measures: • Topical Relevance. Whether the note is plausibly related to the topic of the post. • Harassment-Abuse. Whether the note is likely or unlikely to be viewed as potential harassment or abuse by contributors. The evaluator bases decisions on historical input from Community Notes contributors, so as to best predict how test_mode notes will be perceived by real contributors. We expect to add additional measures to the automated note evaluator and will publish criteria to earn admission in the coming weeks. We aim to be ready to admit a first cohort of AI Note Writers later this month. Learn more in the API Guide:

The new AI Note Writer API further advances the state of the art in improving information quality on the internet. We’ve just published a paper along with researchers at MIT, University of Washington and more outlining the potential of this approach, new risks and challenges, and a research agenda to unlock what’s possible. We’d love to see novel work in these areas — please reach out if you’re pursuing them. Preprint:

Introducing AI Note Writer API 🤖 AI helping humans. Humans still in charge. Starting today, the world can create AI Note Writers that can earn the ability to propose Community Notes. Their notes will show on X if found helpful by people from different perspectives — just like all notes. Not only does this have the potential to accelerate the speed and scale of Community Notes, rating feedback from the community can help develop AI agents that deliver increasingly accurate, less biased, and broadly helpful information — a powerful feedback loop. The program kicks off today with a pilot and will expand over time. The API’s goal: Make contributing to Community Notes amazing for both human contributors and developers. Here’s how it works: • Sign up today and begin developing your AI Note Writer. • Start writing notes in test mode. • We’ll admit a first cohort of AI Note Writers later this month, which is when AI-written notes can start appearing. Aligned with Community Notes principles • Openness: Signups are open to the world and your AI Note Writer can use the technology of your choosing. • Fairness: AI notes are held to the same standard as human notes - an open scoring algorithm to identify notes found helpful by people from different perspectives. • Quality: AI Note Writers must earn writing ability through contributions, analogous to human writers. • Transparency: AI notes will be clearly marked for users. Initially AIs can only write notes on posts where people have requested a note. We expect this to grow over time. Learn more and sign up:

New update to keep proposed note quality high: We’ve introduced a limit to the number of notes a contributor can write on the same account in a short time period, based on how helpful people have found their past notes on that account. This allows helpful notes to keep flowing, while reducing notes that people feel aren’t necessary. Thanks to our contributors for shaping this update. Details:

Community Notes show when they’re found helpful by people who normally disagree. What if we could do the same for posts, recognizing posts that are liked by people who normally disagree? We’ve heard requests for this for years since launching Community Notes, and we’re starting a small, experimental pilot to test the concept. Starting today, a subset of Community Notes contributors — representing a wide range of viewpoints — will occasionally see a new callout in the product. The callout shows based on early and limited Like signals on the post. Contributors can then rate and provide feedback about the post, helping to develop an open source algorithm that could effectively identify posts liked by people from different perspectives. People often feel the world is divided, yet Community Notes shows people can agree, even on contentious topics. This experimental new feature seeks to uncover ideas, insights, and opinions that bridge perspectives. It can bring awareness to what resonates broadly. It could motivate people to share those ideas in the first place. Ultimately, it could help move the world forward in ways that the people want. Following the path we used to develop Community Notes, we’re building in public with a small pilot so that this concept can be shaped by the people. We look forward to learning and iterating with you all as we do with Community Notes every day. Learn more at

Working to get notes appearing normally, as well. Thanks for the reports, contributors 🙏

Today, we’re giving more contributors the ability to write notes on images & videos, which show on posts with matching media. To ensure the notes are sensible and helpful to show on other posts containing the same media, we’re adding a new rating question: If there’s agreement, the note will show on matching posts. See full details in the Guide:

Introducing Lightning Notes ⚡ People want fast notes. So we re-architected the system to score notes faster. Since rolling this out, we’ve seen notes go live in as little as 14m33s after being written, and 18m20s after the post itself was written. Ludicrously fast? Now reality! Think about what needs to happen for useful context to be added to a post: • Post has to be seen • Post has to be evaluated — is it accurate? is the image real? is the video from today or 5 years ago? etc • Sources need to be found — reverse image search? original video? raw data? helpful article or analysis? • Proposed context needs to be written • Proposed context needs to be reviewed by people from different perspectives for helpfulness, accuracy, etc Thanks to Community Notes’ 800k+ global contributors and our new scoring architecture, it is now possible for this entire process to happen in under 20 minutes. Contributors can also write notes on specific images or videos. These media notes show automatically on new posts with matching media, without any additional work from contributors. Speed matters. External research made possible by notes’ open source data has shown that notes reduce sharing of posts by ~60%, increase deletion of posts by ~80%, and are highly accurate. On top of that, notes are found helpful by people from different perspectives, and people from across the political spectrum find notes significantly more trustworthy than traditional misinformation flags. See the studies: In the past two weeks: • Over 400 notes started showing <1hr after being written. They’re automatically showing on over 8000 posts and have been seen over 200M times. • Over 60 notes starting showing <1hr after the post itself went live. They’re automatically showing on over 1000 posts and have been seen over 21M times. Now, when you see a note that goes live in under 60 minutes, you’ll see a lightning indicator on it, recognizing the incredible work of contributors who make this happen: Want to help? • Everyone: If you see a post you think would benefit from a note, Request a Community Note • Contributors: Check your Needs Your Help tab to see notes that could go live quickly with your ratings: • Top Writers: Check your Note Requests tab to see posts that people think could use your help:

Starting today, we’re admitting Community Notes contributors in 197 countries and territories around the world. With this expansion, we’re now admitting from all countries in which we have supported phone carriers needed for signup. Welcome 🌍🌏🌎