FreeFable Coalition · 2026-06-14 · major
FreeFable — 300+ security leaders ask the White House to lift the Fable 5 ban
Bruce Schneier, Alex Stamos, Katie Moussouris and 300+ cybersecurity executives sign an open letter calling the export controls on Anthropic's Fable 5 and Mythos 5 a 'misguided' action that hurts defenders more than attackers.
Bruce Schneier, Alex Stamos, Katie Moussouris and 300+ security execs publicly ask the White House to reverse the Fable 5 and Mythos 5 export controls.
What is it?
FreeFable is an open letter signed by over 300 cybersecurity executives, researchers, and CISOs urging the White House to lift the export-control directive that took Anthropic's Fable 5 and Mythos 5 offline on June 12. Signatories include Bruce Schneier, Alex Stamos, Katie Moussouris of Luta Security, Bugcrowd's Casey Ellis, Rachel Tobac of SocialProof Security, and Paul Vixie.
How does it work?
Moussouris — the only outside expert to read the third-party paper that triggered the ban — says the so-called jailbreak was researchers asking the model to 'fix this code' after a 'review for vulnerabilities' request was refused. Patching a vulnerable file inherently requires identifying the vulnerability. The letter argues this is standard defender work and that comparable capabilities exist in GPT-5.5, Claude Opus 4.8, and Chinese frontier models. The signatories ask for scientific, transparent, and minimally restrictive future regulation.
Why does it matter?
Anthropic's Fable 5 and Mythos 5 have been offline since June 12. The signatories say cutting defenders off from frontier models while attackers can still reach equivalent systems is a strategic loss. The letter and parallel reporting from The Atlantic, TechCrunch, Axios, and Fortune are now the public counter-pressure on the directive — a major test of how AI export controls will be applied going forward.
Who is it for?
security researchers, AI policy watchers, anyone tracking the Fable 5 fallout
Try it
https://freefable.orgKey numbers
- signatories: 300+
- models affected: Fable 5, Mythos 5