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.