San Francisco-based chatbot maker Anthropic said Monday that it is backing landmark artificial intelligence legislation in California, one year after the first attempt to regulate the burgeoning industry ended in a veto by Gov. Gavin Newsom.

The endorsement makes Anthropic the first large AI company to back SB 53 by Sen. Scott Wiener (D-San Francisco), which would require the biggest AI companies to disclose their safety and security protocols and report critical safety incidents to the governor’s office within 15 days. It would also offer protections to whistleblowers at AI companies of any size who call out risky or dangerous behavior.

Anthropic’s support is a big win for Wiener, but the bill still faces opposition from large business and tech groups. Still, the company’s support

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