Leaked benchmark results suggest it 'destroys every other model' including GPT-5, Claude 4 Opus, and Gemini Ultra 2.0

Achieved 73% success rate on expert-level CTF challenges and completed full 32-step network attack simulation

First AI model documented to autonomously complete a full, multi-step cyber attack simulation in UK safety tests.

Evaluated by UK AI Safety Institute for autonomous cyber attack capabilities.

Scored 83.1% on the CyberGym benchmark for vulnerability discovery.

Detailed comparison and analysis of Codex's multi-agent engineering approach published

Released as native Windows application, shifting from cloud-based GitHub Copilot service