I don't think AI companies should be doing this, but they are doing it. All are opt-out, not opt-in. Anthropic is just changing their policies to be the same as their competition.

xAI trains Grok on both public data (Tweets) and non-public data (Conversations with Grok) by default. [0]

> Grok.com Data Controls for Training Grok: For the Grok.com website, you can go to Settings, Data, and then “Improve the Model” to select whether your content is used for model training.

Meta trains its AI on things posted to Meta's products, which are not as "public" as Tweets on X, because users expect these to be shared only with their networks. They do not use DMs, but they do use posts to Instagram/Facebook/etc. [1]

> We use information that is publicly available online and licensed information. We also use information shared on Meta Products. This information could be things like posts or photos and their captions. We do not use the content of your private messages with friends and family to train our AIs unless you or someone in the chat chooses to share those messages with our AIs.

OpenAI uses conversations for training data by default [2]

> When you use our services for individuals such as ChatGPT, Codex, and Sora, we may use your content to train our models.

> You can opt out of training through our privacy portal by clicking on “do not train on my content.” To turn off training for your ChatGPT conversations and Codex tasks, follow the instructions in our Data Controls FAQ. Once you opt out, new conversations will not be used to train our models.

[0] https://x.ai/legal/faq

[1] https://www.facebook.com/privacy/genai/

[2] https://help.openai.com/en/articles/5722486-how-your-data-is...