From OpenAI: "We’ve trained a model called ChatGPT which interacts in a conversational way. The dialogue format makes it possible for ChatGPT to answer followup questions, admit its mistakes, challenge incorrect premises, and reject inappropriate requests.
ChatGPT is a sibling model to InstructGPT⁠, which is trained to follow an instruction in a prompt and provide a detailed respons"

From Anthropic: "Claude is an artificial intelligence, trained by Anthropic using Constitutional AI to be safe, accurate, and secure — the trusted assistant for you to do your best work.
If you can dream it, Claude can help you do it. Claude can process large amounts of information, brainstorm ideas, generate text and code, help you understand subjects, coach you through difficult situations, simplify your busywork so you can focus on what matters most, and so much more."

From Google: "Chat with Gemini to supercharge your ideas. Your Gemini mobile app gives you direct access to Google’s best family of AI models on your device so you can:
Get help with writing, brainstorming, learning, and more"