OpenAI is supporting an Illinois state bill that would limit the liability of AI labs for harm caused by their models, as long as they did not intentionally or recklessly cause the harm and have published safety and transparency reports. The bill defines a frontier model as any AI model trained using over $100 million in computational costs, which could apply to large AI labs like OpenAI and Google. The bill aims to reduce the risk of serious harm from advanced AI systems while allowing the technology to be developed and used. The legislation is part of a broader discussion on AI regulation and liability in the US.