Elon Musk breaks rank to back California's AI bill

Elon Musk just broke ranks with Silicon Valley by throwing his support behind California’s controversial AI safety bill, SB 1047.

The proposed legislation requires developers of very large AI models to establish and document rigorous safeguards to prevent their systems from causing catastrophic harm.

Breaking away from the tech crowd

Writing on X on Monday afternoon, Musk admitted that backing the bill was a tough call that would upset some people. Still, he argued that California should probably pass it, noting that he has advocated for AI regulation for over 20 years just as society regulates any potentially hazardous technology.

The endorsement puts Musk directly at odds with rival OpenAI, which recently came out against SB 1047 in favor of an alternative framework.

Notably, even though Musk previously vowed to move his businesses out of California, his own frontier lab, xAI, would still fall under the bill's jurisdiction.

Why it matters

Musk’s move scrambles the battle lines around state-level AI governance.

Silicon Valley heavyweights and venture capitalists have spent weeks lobbying furiously against SB 1047, claiming it will strangle open-source development and crush innovation. Having one of the world's most prominent AI founders back mandatory safety protocols gives California lawmakers massive political cover.

For the broader industry, it shows that the debate over frontier risks is no longer just policy theory. The split between AI heavyweights over how fast to push forward—and who should hold the brakes—is now completely out in the open.