California's Senate Bill 1047, aimed at regulating large-scale AI models, is set for a crucial vote in the Assembly amidst mixed reactions from tech leaders. The bill mandates that AI developers with models costing over $100 million must implement a Safety and Security Plan (SSP) and include features like a 'kill switch' for unsafe models. While some experts praise it as a potential model for European AI regulations, industry figures, including OpenAI's Sam Altman, express concerns about its implications for innovation. Anthropic, however, has offered cautious support following amendments that address some of their concerns. The bill's progress suggests California could lead the way in AI governance, though significant opposition remains from major tech companies.