Mark Zuckerberg Breaks 3-Year X Silence to Launch Meta's Agentic AI Model, Muse Spark 1.1

Meta Platforms CEO Mark Zuckerberg posted on X for the first time in three years on July 9, 2026, to announce the company's latest artificial intelligence model, Muse Spark 1.1.

Zuckerberg's last post on the platform, formerly known as Twitter, was in July 2023. The return marks a shift in his public engagement with the social media service.

Muse Spark 1.1 is described as an agentic AI model, capable of performing tasks autonomously. Meta has been investing heavily in AI development, positioning itself as a competitor in the rapidly evolving field.

The announcement comes amid ongoing competition among major tech companies to release advanced AI systems. Zuckerberg's post did not provide technical details or a release timeline for the model.