OpenAI Unveils GPT-5.6 Sol as Its Most Advanced Cybersecurity AI

OpenAI has launched a limited preview of its GPT-5.6 model lineup, with Sol being marketed as its most advanced cybersecurity AI, specifically optimized for defensive security tasks like vulnerability identification and patch development. Following consultation with the US government, the tiered release includes Sol for high-intensity reasoning, Terra for everyday workloads at half the cost of previous models, and Luna as the fastest, most affordable option. The restricted rollout to trusted partners is temporary as OpenAI works with federal authorities to address national security concerns, though the company has pushed back against making government pre-clearance a permanent requirement, arguing it delays essential defensive tools from reaching the broader cybersecurity community.