Fact · Voice privacy and security
Stanford HAI reports that Anthropic changed its consumer terms so that conversations with its Claude chatbot are used for training by default, unless the user opts out.
Checked against its source on October 17, 2026
In the source's own words
“Last month, Anthropic made a quiet change to its terms of service for customers: Conversations you have with its AI chatbot, Claude, will be used for training its large language model by default, unless you opt out.”
Be Careful What You Tell Your AI Chatbot, Jennifer King and Stanford Institute for Human-Centered Artificial Intelligence, Stanford Institute for Human-Centered Artificial Intelligence (HAI), 2025, Opening paragraphs.
Open the original- What it measures
- The article cites this as an example of a policy change that sets training on by default. The change concerns chat conversations, not the audio of dictation, which Anthropic describes separately.
- What it does not show
- The article says last month without giving the date, so the timing of the change is not stated here. The description is the researchers' summary of the terms, which may have changed since.