How the X (Twitter) algorithm works in 2026

In 2023, X did something no other major platform had: it published its ranking algorithm as open source. The code confirmed what power users already suspected. A reply is worth far more than a like, a repost more again, and a post that makes people leave the app is quietly penalised. If you have ever wondered why a sharp original thought got 12 likes while a throwaway reply blew up, the answer is in how X weights engagement. Here is how the For You feed actually ranks posts in 2026.

The 30-second answer

The For You feed gathers candidate posts, scores each one on how likely you are to engage, and ranks the highest to the top. The weights are lopsided. In X's open-sourced code a reply counts roughly 27 times a like, and a reply that the original author responds to is worth dramatically more again. Reports, mutes and blocks push a post down hard, and so does anything that sends users out of the app. The feed rewards posts that start conversations, not posts that just collect passive likes.

How the For You feed ranks a post

Roughly half your feed is in-network (accounts you follow) and half is out-of-network, surfaced by the recommendation engine from people you do not follow. Every candidate runs through a heavy ranker, a model predicting the chance you reply, repost, like or dwell. The open-sourced weights tell the story: a like scores about 0.5, a repost 1, a reply 13.5, and a reply the author engages with around 75. On the other side, a report scores roughly minus 369, which is why a single mass-reported post can vanish from reach entirely.

What this means for growth

Reply more than you post, and reply where the audience already is, under larger accounts in your niche. Take a clear stance instead of hedging, because posts that split opinion pull replies. When people comment on your posts, reply back: author engagement lifts the whole thread. And keep people in the app, because native images and video out-reach posts that send users to an external site. If you have to share a link, the common move is to put it in a reply rather than the main post. The tactics sit in our guide to getting more followers on X, and the verification guide covers the reach boost that comes with a paid checkmark.

What X quietly penalises

• External links: posts that send people off-platform reach fewer feeds. Put the link in a reply if you can.
• Negative signals: mutes, blocks, reports and not-interested taps demote a post fast, and they compound.
• Topic-hopping: jumping between unrelated subjects makes it harder for the recommender to learn who to show you to.
• Engagement bait: obvious ratio-farming can pull the negative signals that sink the post it was meant to lift.

The cold-start reality on a small account

A new account gives the recommender almost nothing to work with, and it carries low social proof, so its replies and posts get buried under accounts the system already trusts. People also check a follower count before they follow back, which makes the first few hundred the hardest. Early X followers and engagement give the recommender a starting signal and make your replies look worth taking seriously while you put in the reply-game reps. It is a baseline, not a substitute: the weights above still reward conversation, and that part is on you.

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