Palantir, Nvidia and Booz Allen Hamilton Restrict Anthropic's Fable Model Over Data Retention Concerns

Major enterprises and defense contractors are restricting deployment of Anthropic's Fable model family, demanding irrevocable zero-data-retention guarantees before exposing proprietary or classified information to the frontier AI system. Palantir Technologies, Nvidia, and Booz Allen Hamilton, among other large organizations, have begun limiting or eliminating use of Anthropic's most capable models following the company's June 2026 shift to a 30-day mandatory data retention policy for safety monitoring on its Mythos and Fable models.