claude.ai still isn't as accessible to me as a blind person using a screen reader as ChatGPT, or even Gemini, is, so I'll stick with the other models.

My understanding of the Americans with Disabilities Act, is that companies that are located in the US and/or provide goods/services to people living in the US, must provide an accessible website. Maybe someone more well-versed in this can come along and correct me or help you to file a complaint if my thinking is correct.