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X publishes AI-powered algorithm code revealing "For You" feed mechanics
X released its latest 'For You' feed algorithm on GitHub, confirmed by Elon Musk as 'purely AI' since November via xAI servers. The feed includes Thunder (posts from followed accounts, ranked by engagement) and Phoenix (AI recommendations analysing your last 128 engaged posts).
What changed
Key factors are likes, replies, reposts, dwell time, and video viewing: both boosted in the new system. Creator diversity limits how often one account can post, penalising frequent posters. External links are still penalised; muting or blocking thwarts reach. Musk admitted' the algorithm sucks" and aims to improve it. This means video content and dwell time are prioritised, while link posts and frequent posting are penalised.
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Original newsletter text and archive evidence
X publishes AI-powered algorithm code revealing "For You" feed mechanics
X released its latest 'For You' feed algorithm on GitHub, confirmed by Elon Musk as 'purely AI' since November via xAI servers. The feed includes Thunder (posts from followed accounts, ranked by engagement) and Phoenix (AI recommendations analysing your last 128 engaged posts).
Key factors are likes, replies, reposts, dwell time, and video viewing: both boosted in the new system. Creator diversity limits how often one account can post, penalising frequent posters. External links are still penalised; muting or blocking thwarts reach. Musk admitted' the algorithm sucks" and aims to improve it. This means video content and dwell time are prioritised, while link posts and frequent posting are penalised.
Source captured . No explicit first-contributor label was provided for this update.
