BREAKING: 𝕏 has published the latest update to the open-source algorithm powering the For You feed.
The new update changes 47 files, adding 5,850 lines and removing 586. Key changes:
• Phoenix now uses a long-dwell setting instead of short dwell, placing more emphasis on time spent viewing posts
• The ranking weight for opening a video rises from 0.05 to 0.07, while dwell rises from 0 to 0.05
• New indexes help retrieve immersive videos receiving likes across different age ranges, extending up to 30 days
• The Following feed gets stronger block and mute protection, including quotes and reposts involving blocked accounts or accounts that blocked the viewer
• Cold-start ranking now uses views received specifically on Home instead of total views. Its Top-K setting drops from 5 to 2
• The follower threshold separating reply-spam detection from special reply ranking moves from 100,000 to 120,000
• Abuse models can now request approved actions such as labels, suspensions and account challenges, protected by allowlists, logging and a 16-action safety cap
• The existing Brazil 2026 election-filter list expands from 665 to 2,328 account IDs. Posts remain eligible for people explicitly following those accounts
• X’s newer ad brand-safety check is now enabled by default
• A new priority-post stream has been added to the early content-quality screening system
𝕏 is not just talking about algorithmic transparency. It is publishing the code. The most transparent platform on the internet.
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