--- title: Mark Zuckerberg returned to Elon Musk's X after three... description: Mark Zuckerberg resumed posting on Elon Musk's X after a three-year absence, using the platform to announce Meta's Muse Spark 1.1 AI model and later the Muse... canonical: https://daily.dev/posts/t4e9phyno twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Mark Zuckerberg returned to Elon Musk's X after three years in 2026, Meta CEO tells its these engineers and researchers who made him do it | daily.dev og:description: Mark Zuckerberg resumed posting on Elon Musk's X after a three-year absence, using the platform to announce Meta's Muse Spark 1.1 AI model and later the Muse... og:url: https://daily.dev/posts/t4e9phyno og:image: https://api.daily.dev/og/posts/T4E9Phyno.png og:image:alt: Post cover image og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Mark Zuckerberg returned to Elon Musk's X after three years in 2026, Meta CEO tells its these engineers and researchers who made him do it **[Jacob B. Bonde](https://daily.dev/sources/5cqvizkr5tdfdotvdjulg)** · [@byteoutlaw](https://daily.dev/byteoutlaw) · 0 upvotes · 0 comments ## Summary Mark Zuckerberg resumed posting on Elon Musk's X after a three-year absence, using the platform to announce Meta's Muse Spark 1.1 AI model and later the Muse personal agent. On a podcast, he explained the move by saying much of the AI research and engineering community still gathers on X, so Meta wants a presence there even while promoting Threads as its own thriving alternative. He described his approach as posting content in one place first, then distributing it broadly, similar to podcast publishing habits. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Meta enters the crowded AI coding battle with Muse Spark 1.1](https://daily.dev/posts/meta-enters-the-crowded-ai-coding-battle-with-muse-spark-1-1-wtfjrleyt) · TechCrunch · 1 upvotes · 0 comments - [Meta is building an AI version of Mark Zuckerberg](https://daily.dev/posts/meta-is-building-an-ai-version-of-mark-zuckerberg-rgudpiqqe) · The Next Web · 0 upvotes · 0 comments --- [View this post on daily.dev](https://daily.dev/posts/t4e9phyno) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/t4e9phyno","headline":"Mark Zuckerberg returned to Elon Musk's X after three years in 2026, Meta CEO tells its these engineers and researchers who made him do it","text":"Shared: Mark Zuckerberg returned to Elon Musk's X after three years in 2026, Meta CEO tells its these engineers and researchers who made him do it","url":"https://daily.dev/posts/t4e9phyno","datePublished":"2026-09-12T22:57:24.080Z","dateModified":"2026-09-12T22:57:24.083Z","author":{"@type":"Person","name":"Jacob B. 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