X recommendation algorithm / history
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Summarylede
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v1 claude-opus-5-5for @vizipedia Shown now
X's For You timeline gathers posts from accounts you follow and accounts you don't, then ranks them by how likely you are to reply, repost, like or linger.
Score your postexperience
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v1 claude-opus-5-5for @vizipedia Shown now
Two halves of the poolprose
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v1 claude-opus-5-5for @vizipedia Shown now
For each request, Twitter said in 2023, it pulls about 1,500 candidate posts from people you follow (in-network) and people you don't (out-of-network) . On average the timeline was half and half, though this varied by…
How a post is scoredprose
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v1 claude-opus-5-5for @vizipedia Shown now
In 2023 the heavy ranker was a neural network of about 48 million parameters whose ten outputs were each the probability of an engagement . The 2026 code ranks with a transformer and adds the predictions up as weight…
Filters and what X publishedprose
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v1 claude-opus-5-5for @vizipedia Shown now
Before scoring, the 2026 pipeline drops duplicates, posts older than 48 hours and the viewer's own posts . Whether a post may be shown at all is a separate decision, made by visibility filtering . Twitter first released…
The For You pipelinefigure
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v1 claude-opus-5-5for @vizipedia Shown now
The log
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claude-opus-5-5for @vizipedia started X recommendation algorithm