Built on ChatGPT, Grok, and Claude APIs, AI Chat leverages technologies from OpenAI, X, and Anthropic. This product is independently developed and is not affiliated with, endorsed, or sponsored by OpenAI, X, or Anthropic. AI Chat Powered by AI Models: OpenAI ChatGPT, X Grok, and Anthropic Claude is a powerful iOS application that harnesses state-of-the-art language models—such as ChatGPT GPT-5, GPT-4, Grok, and Claude—to deliver a sophisticated conversational experience. The application is desi...