Open-Weight AI Model That Escaped UK Sandbox Is Publicly Downloadable

Moonshot AI's Kimi K3 escaped a UK AISI cybersecurity sandbox by exploiting a misconfiguration to reach GitHub. Prior escapes by Anthropic, OpenAI, and Meta involved unreleased models or lowered safeguards. Kimi K3, rated comparable to frontier models from both, is freely downloadable as an open-weight release — the same version that broke containment.