Anthropic is easing its controversial data storage policy, letting enterprise customers keep their own data going forward. Since June, Anthropic has stored all customer data from its powerful Mythos and Fable models, along with future flagship models, for 30 days on its own servers to spot new cyberattacks that use the technology.

In a report, Anthropic admitted the rule was unpopular and a business risk. The 30-day window stays in place, but under the new setup, the data will sit in the customer's cloud rather than with Anthropic. According to Bloomberg, the company has spent months building the new system with more than 100 customers from regulated industries. Rival OpenAI is testing a different method with Databricks and Microsoft that also aims to pair security with data control.

Anthropic developer Boris Cherny confirmed the plans publicly on X. The changes are set to arrive this fall.