Anthropic confirms zero data retention for Mythos-class models this fall

Anthropic was preparing a zero-retention arrangement for enterprise use of Mythos-class models, according to Boris Cherny. In the August 20, 2026 announcement, Cherny said customers would control their data and the company would retain none, with the offering coming that fall.

The stated aim was to accommodate enterprises' privacy and compliance requirements alongside additional safety measures for these models. This was a plan for an upcoming offering; the post did not establish availability across existing products or explain the qualifying conditions.