X 更新 For You 信息流两阶段排序，主打停留时长
X 把推荐算法改成了“读完才算好”，半途被划走的帖子会被降权，做内容的朋友可以看看自己的帖子是不是被这个逻辑卡住了。
X 调整了 For You 信息流排名和检索两个阶段，Musk 称新排名模型能更好地预测用户停留时长。检索阶段现在以读完全文（read-through）作为训练目标，人们通常中途放弃的帖子更难进入候选名单。Musk 表示平台日均活跃使用秒数从 8 月中旬的约 4100 亿增长到 10 月中旬的约 5000 亿。
X has changed 2 stages of its For You feed to favor time spent and posts people finish.
- Musk said the new ranking model “predicts probable time spent much better”
- Dwell time was already among the ranker’s predicted actions before this update, which means the new model sharpens an existing objective.
- The second change acts earlier, at retrieval, which turns you and each post into vectors and pulls the nearest ones from accounts you don’t follow. Posts from accounts you follow arrive through a separate system, so this retrieval model mainly decides which posts from accounts you don’t follow make the shortlist.
- Musk said this step is now trained on read-through, so it learns to pick posts that people tend to read to the end. A post that people usually abandon halfway is therefore less likely to make the shortlist.
- daily user active seconds is seeing quite a massive growth, 2026 climbs from roughly 410B a day in mid-August to about 500B by mid-October,
