OpenAI on Monday unveiled a new cybersecurity-focused model called GPT‑5.6‑Cyber that it said is focused on vulnerability research, penetration testing, and incident response. GPT-5.6-Cyber, a more cyber-permissive version of GPT-5.6 Sol, builds upon GPT‑5.5‑Cyber, which OpenAI released in June 2026. The tests show that GPT‑5.6‑Cyber completes 95.0% of these requests, compared with just 1.5% for GPT‑5.6 Sol and 2.0% when used with Daybreak Blue access. GPT‑5.6‑Cyber is trained to improve performance on certain cybersecurity workflows involving exploit development and advanced security research. "Models running with reduced safeguards carry risks beyond standard model usage, whether from misuse or misalignment," OpenAI said.