Meta's Muse agent competes with ChatGPT, raising the stakes for OpenAI's DevDay conference. Sam Altman's company is expected to respond.

Muse Charm was Mark Zuckerberg’s “one more thing” at the end of the company’s Connect 2026 keynote, and it’s pretty much the prototypical AI gadget. The details are scant, but from the sound of it, it’s a keychain that comes equipped with Muse, Meta’s latest/greatest AI model.

Topline Mark Zuckerberg overtook Sergey Brin to become the fifth-wealthiest person in the world on Wednesday, after a jump in Meta’s stock price likely tied to hype for the company’s new Muse AI agent boosted his fortune by more than $4 billion Wednesday alone.

Zuckerberg’s boost in net worth came as shares of Meta jumped 4.5% on Thursday.

Muse have explained how they've had to change their social media handles because Mark Zuckerberg wanted to use the name 'muse' for his new AI tool.

The app is powered by Meta's Muse Spark family of AI models and is a major push by CEO Mark Zuckerberg into the AI agent market. Meta's Muse AI personal agent tool has only been out for nearly two weeks, and it's topping the app store charts.

Meta founder and CEO Mark Zuckerberg has gone to great lengths to hype the security of its new AI assistant Muse, claiming it is “built from the ground up for privacy and security.” A zero-day vulnerability that gives locally run apps and terminal commands complete control of the agent raises serious doubts.