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Starting September 28, Anthropic users must opt-out to prevent their conversations with Claude from being used in AI training, shifting the burden to users to protect their data privacy.
Anthropic, the company behind the popular AI chatbot Claude, is rolling out a significant update to its data policy. Effective September 28, users will have to explicitly opt-out if they do not want their conversations with Claude to be used for training and improving AI models. This change is part of Anthropic's ongoing efforts to balance user privacy with the need for high-quality training data.
Anthropic has introduced a new data consent mechanism that gives users more control over how their interactions are used. Here’s a breakdown of the key changes:
For AI researchers and developers, this change highlights a growing trend in how companies handle user-generated data. Here are some key points to consider:
Anthropic has provided the following implementation details:

/user/optout).While Anthropic has not released detailed benchmarks, early internal tests suggest that the new data handling practices have had a positive impact on model performance. Specifically:
If you are an Anthropic user and do not want your conversations to be used for AI training:
Anthropic's new data policy is a step towards more transparent and user-centric AI practices. By giving users control over their data, the company aims to build trust and improve the quality of its models. As an AI practitioner, it’s worth keeping an eye on how these changes impact both model performance and user engagement.
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Kai built ML infrastructure at a Bay Area startup before developing an obsession with transformer architectures and inference optimisation that eventually pulled him out of product work entirely. A stint at a compute research lab sharpened his instinct for what actually matters in a model release versus what is marketing. He writes from the inside — from the perspective of someone who has debugged the systems he is describing at three in the morning. He is allergic to hype and instinctively drawn to the unglamorous plumbing questions that everyone else skips over.
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