X (formerly Twitter) is rolling out one of its biggest changes in years — Custom Timelines. X’s Custom Timelines is a new feature that lets users build dedicated and topic-focused feeds directly in the app. This change was announced by X’s Head of Product Nikita Bier and is intended to give users more control over what they see.
What are X (Twitter’s) Custom Timelines?
It is a feed feature, and as such, Custom Timelines will allow users to pin specific topics to their home screen. This will let users turn their feed into a standalone feed, rather than relying solely on the default For You algorithm. So now you can switch between focused streams such as AI, finance, sports, or entertainment.
This effectively transforms X into a more interest-first platform, where discovery is driven by topics rather than just accounts or viral posts.
Grok’s role in powering Custom Timelines
A key part of this feature is Grok, X’s in-house AI system developed by xAI. Grok will work behind the scenes to analyze posts, understand context, and surface relevant content for each custom timeline.
Instead of simple keyword matching, Grok uses AI-driven context to ensure that feeds stay relevant and up to date. With this change, your timeline will not just have a stream of random mentions, but a curated mix of news, insights, and trending discussions.
Like most of the tools and services in 2026, this also showcases X’s push toward AI-led personalization.
Will Custom Timelines Actually Matter?
For years, X has leaned heavily on a single algorithmic feed, which was notorious for mixing unrelated content, while making it harder to follow niche interests.
This new change will give users more control over how they consume content, especially if they want to avoid noise or stay updated on specific topics. You can call it a more modular version of X (Twitter), where instead of one central feed, you can build multiple micro-feeds around your interests.
X is also experimenting with features like topic controls, allowing users to refine what appears in their feeds even further.
Who can Access Custom Timelines on X (Twitter)?
Right now, Custom Timelines are not available to everyone. The feature is in an early rollout phase and is limited to Premium subscribers on iOS.
The Bigger Picture
As social platforms compete for attention, user control is becoming a key differentiator. With this move, X is shifting from a passive, algorithm-driven experience to a more user-curated model.
FAQs
What are Custom Timelines on X (Twitter)?
Custom Timelines are topic-based feeds that users can pin. This will allow them to follow specific interests instead of relying only on the default algorithmic feed.
How do X’s Custom Timelines work?
Users select topics, and X curates a dedicated feed for each one using AI. These timelines can be accessed separately from the main “For You” and “Following” tabs
Who can use Custom Timelines?
Right now, Custom Timelines is in an early rollout phase and is limited to Premium subscribers on iOS.
Will Custom Timelines replace the “For You” feed?
No. The “For You” feed will continue to exist.
What is the difference between the default timeline and Custom Timelines on X?
The default timeline on X (Twitter) is algorithm-driven and shows a mix of posts based on your activity and accounts you follow, whereas Custom Timelines are curated using AI and giving you more control over your feed.
Are Custom Timelines similar to Twitter Lists?
No, Twitter Lists are manually created and show posts only from selected accounts, while Custom Timelines are AI-curated feeds based on topics.
