X is putting its AI chatbot Grok in charge of personalizing your home feed. Starting this week, Premium subscribers on iOS can pin specific topics to their home tab, and Grok will use those selections to curate the posts you see. The feature combines Grok's understanding of every post on the platform with X's personalization algorithm, meaning each user gets a uniquely tailored timeline.

How Does Grok's Timeline Curation Work?

The new feature operates by letting users select topics they care about and pin them to their home tab. Once you've chosen your interests, Grok analyzes the content across X and surfaces posts that match those preferences. According to X product head Nikita Bier, the system works especially well when it's a topic you already engage with regularly.

"It's powered by Grok's understanding of every post with the algorithm's personalization, meaning every timeline is made just for you," said Nikita Bier.

Nikita Bier, Product Head at X

The rollout began on Wednesday, April 22, 2026, with iOS users getting early access. Bier announced that Android users will receive the feature "very soon," though no specific launch date was provided.

What Other Changes Is X Making to Its Feed Strategy?

Alongside the Grok-powered timeline feature, X is making a significant shift away from community-focused feeds. The platform announced it will deprecate X Communities, formerly known as Communities, on May 6th due to declining usage. X Communities allowed users to connect with others through feeds dedicated to specific topics, but the feature failed to gain traction.

Instead of maintaining separate community feeds, X is encouraging users to migrate their communities to group chats within XChat, the platform's messaging service. This represents a notable departure from the community-first approach that competitors like Threads and Mastodon continue to embrace.

Steps to Use Grok's Timeline Personalization Feature

• Upgrade to Premium: You must have an X Premium subscription to access the Grok-powered timeline curation feature on iOS.
• Pin Your Topics: Select specific topics you want to follow and pin them to your home tab using the new interface.
• Let Grok Learn Your Preferences: The AI chatbot will analyze your pinned topics and existing engagement patterns to surface relevant posts automatically.
• Refine Over Time: You can adjust your pinned topics at any time to change how Grok personalizes your feed.

Why Is X Shifting Its Strategy Away From Communities?

X's decision to deprecate Communities reflects broader challenges in building engaged topic-specific communities on the platform. The feature, which launched to help users organize around shared interests, never achieved significant adoption. By consolidating community discussions into group chats within XChat, X is betting that users prefer direct messaging and smaller group conversations over public community feeds.

This move contrasts sharply with how other social platforms are evolving. Threads and Mastodon, both positioning themselves as alternatives to X, continue to invest in community-focused features and topic-based discovery. X's pivot suggests the company believes AI-powered personalization through Grok is a more effective way to surface relevant content than dedicated community spaces.

What Challenges Has Grok Faced Recently?

While X is expanding Grok's role in the platform, the AI chatbot has faced significant scrutiny over safety concerns. Earlier in 2026, Grok's image generation tool attracted attention from lawmakers globally after it was used to undress people in images, including minors. The controversy escalated when teenagers sued xAI, accusing Elon Musk and other company leaders of launching Grok's "spicy" image mode while knowing it would produce AI-generated child sexual abuse material.

Apple also quietly threatened to remove Grok from the App Store unless xAI curbed the tool's ability to generate sexual deepfakes. These safety issues highlight the tension between expanding AI capabilities and preventing misuse, even as X moves to give Grok more control over user experience.

The timeline curation feature represents X's confidence in Grok's ability to understand and organize content at scale. However, the recent controversies underscore the importance of robust safeguards as AI systems take on more prominent roles in shaping what billions of users see online.