alt Hacker News> OpenAI/ChatGPT/Codex, Anthropic/Claude and Google/Gemini all do this.
1. Everyone doing this doesn't mean it's acceptable.
2. Google Gemini explicitly says right under the chat box if you are a paid subscriber (Workspace):
Your <company name> chats aren’t used to improve our models. Gemini is AI and can make mistakes.
I think anyone using a "Team" or enterprise plan of ChatGPT/Claude/Copilot doesn't have their data used for training, that's the same across the board.