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-use” cybersecurity requests — that is, requests that could be used for legitimate defensive or malicious offensive purposes. Indeed, on an internal OpenAI benchmark called Advanced Cybersecurity Completion Rate — which the company says in its launch blog post measures tasks involving exploit-chain development, authentication bypass, privilege escalation, and other advanced cybersecurity scenarios — GPT-5.6-Cyber completed 95% compared to just 57.3% from its immediate predecessor model GPT-5.5-Cyber, and just 1.5% with the normal GPT-5.6 Sol model and all its safeguards applied. OpenAI researcher Eric Wallace posted on X, describing GPT-5.6-Cyber as OpenAI’s “first large-scale attempt at directly …