AI Research
Inside GPT-5.5-Cyber: The Opposite Bet to Anthropic's Fable 5

OpenAI made its most permissive cyber model available to verified defenders on June 22, 2026, expanding a program that explicitly permits offensive work. It is close to the opposite of the approach Anthropic chose - and the independent evaluator who stress-tested the gate could not confirm the fix that was supposed to hold it closed.






