OpenAI has expanded its Daybreak cybersecurity programme with two access tiers, introduced the specialised GPT-5.6-Cyber model and established a global partner network to bring frontier AI capabilities into enterprise security operations. The developments come amid growing concerns that threat actors could use AI to identify vulnerabilities, develop exploits and navigate complex systems with greater speed, scale and autonomy. Daybreak Blue provides access to OpenAI’s frontier general-purpose models, including GPT-5.6 Sol, with safeguards tailored to authorised defensive security activities. Daybreak Red gives approved users access to purpose-trained cybersecurity models for vulnerability research, exploit validation, red teaming and advanced security testing. GPT-5.6-Cyber, built on GPT-5.6 Sol, is available through this tier. Internal testing found that GPT-5.6-Cyber completed 95 per cent of requests included in OpenAI’s Advanced Cybersecurity Completion Rate evaluation. GPT-5.6 Sol completed 1.5 per cent of the same requests under its standard safeguards and 2 per cent through Daybreak Blue. GPT-5.5-Cyber recorded a completion rate of 57.3 per cent, according to OpenAI. Benchmark performance varied by task. GPT-5.6-Cyber outperformed GPT-5.6 Sol and GPT-5.5-Cyber on ExploitGym. GPT-5.6 Sol performed better during OpenAI’s Vulnerability Discovery and Report Writing evaluation. GPT-5.6