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Tech
Apr 23, 2026
Analyzed by GPT OSS 120B

X Unveils Grok-Powered Custom Timelines for Premium Users

AI Summary
X announced Grok‑driven Custom Timelines, letting Premium subscribers pin up to 10 AI‑curated topic feeds to their home tab. The move arrives as X retires Communities and seeks new ad inventory amid mixed revenue reports.

Launch of Grok‑Powered Custom Timelines

Earlier this week X rolled out Custom Timelines, an AI‑generated feed system built on Grok from xAI. Users can select from more than 75 topics—ranging from Business & Finance to e‑sports—and pin them to the home tab, expanding the traditional "For You" and "Following" streams.

Premium‑Only Rollout and Early Metrics

  • Available now to Premium subscribers on iOS; Android support is announced as "in the works".
  • Each user may pin up to 10 topics and reorder them via a simple plus‑sign interface.
  • Second‑position slots in each timeline are occupied by ads, instantly boosting X's ad inventory.
  • Initial topic categories include broad sections (e.g., Technology, Politics) and granular sub‑topics (e.g., Formula 1, K‑pop).

Strategic Implications for X’s Ad Business

The ad‑filled second slot directly addresses X's reported revenue challenges since the Musk acquisition. By creating dedicated ad real‑estate within each AI‑curated feed, X can sell impressions to advertisers targeting highly interested audiences, potentially improving CPMs compared to the generic timeline.

Potential Ripple Effects Across the Social Media Landscape

While Bluesky also experiments with AI‑enhanced feeds, X’s integration of its own large‑language model differentiates it from competitors that rely on third‑party APIs. The retirement of X Communities suggests a strategic shift toward AI‑driven personalization rather than user‑managed groups.

Outlook: Expansion and User Adoption

Analysts expect Android rollout within the next quarter, followed by a possible extension to free tiers if engagement metrics justify broader monetization. If users adopt the custom feeds at scale, X could see higher daily active usage, more precise ad targeting, and a stronger defensive moat against emerging platforms.