Claude Fable 5 blocks basic biology queries like mitochondria due to strict bioweapons safeguards despite strong cybersecurity performance.
Fable-5 launch sparked backlash over opaque safety filters and silent model degradation.
The new model is named Claude Fable & Mythos 5 and enhances AI capabilities.
US government ordered Anthropic to take Claude Fable 5 and Mythos 5 offline citing national security concerns.
Anthropic admits the ban on Claude Fable 5 will cause significant difficulties.
Anthropic cites jailbreak vulnerabilities and cybersecurity weaknesses as the specific reasons for shutting down Mythos and Fable.
Anthropic is negotiating with the administration to regain access to Claude Fable 5.