Mark Zuckerberg posted on X for the first time in three years on July 9, dusting off his @finkd handle to announce Muse Spark 1.1, a new coding AI model built into Meta AI through the company’s Model API.

Meta’s AI pivot is expensive and behind schedule

The Muse Spark 1.1 launch arrives after Meta laid off roughly 8,000 employees during April and May of 2026, a restructuring explicitly designed to clear the decks for an all-in bet on artificial intelligence.

Meta has committed to projected expenditures in the range of $125 billion to $145 billion on AI infrastructure and models for 2026.

Zuckerberg himself has acknowledged the timeline isn’t going according to plan. During an internal town hall, the CEO reportedly said that AI agent development progress has “not really accelerated” over the past four months compared to earlier expectations.