Overview
- Anthropic released Claude Fable 5 on June 9 and then suspended Mythos 5 and Fable 5 for foreign nationals within about 72 hours after a U.S. export‑control directive, taking the models offline for all users as a compliance measure.
- Anthropic disabled calls to Fable 5 platform‑wide and directed integrators to switch new sessions to the default Claude model or Opus 4.8 while existing Fable 5 sessions return errors.
- Reporting cites Amazon CEO Andy Jassy and Amazon researchers as raising technical concerns to U.S. officials after finding prompts that could elicit information useful for cyberattacks, and Amazon confirmed AWS customers were affected.
- Anthropic says the government gave only a few oral examples of so‑called 'jailbreak' attacks, argues similar behaviors appear in other public models, and is pressing for a transparent, fact‑based legal review of the directive.
- The episode affects customers, foreign‑national employees, and cloud partners and creates a precedent for how export controls, cloud providers, and AI vendors will handle fast product rollouts and security disputes going forward.