OpenAI launches GPT-5.6-Cyber with reduced refusals, 95% completion on advanced cybersecurity tasks

Earlier today, OpenAI launched GPT-5.6-Cyber , a specialized model designed to perform advanced vulnerability research and exploit development for approved defenders — including categories of work that its general-purpose models will often refuse. GPT-5.6-Cyber is a fine-tuned version of OpenAI’s most advanced general model, GPT-5.6 Sol, unveiled back in June , but trained specifically to improve performance on advanced cybersecurity tasks, including finding zero-day vulnerabilities and developing exploit chains. Crucially, OpenAI also trained it to reduce refusals on some higher-risk, “dual-u