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You should never assume what you say to a chatbot is private. When you interact with one of these tools, the company behind it likely scrapes the data from the session, often using it to train the underlying AI models. Unless you explicitly opt out of this practice, you've probably unwittingly trained many models in your time using AI.
Anthropic, the company behind Claude, has taken a different approach. The company's privacy policy has stated that Anthropic does not collect user inputs or outputs to train Claude, unless you either report the material to the company, or opt in to training. While that doesn't mean Anthropic