GPT-5.5-Cyber

Every AIbrief event involving GPT-5.5-Cyber, in order.

1. August 11, 2026 · Safety · Developing over 2 days · 3 sources

   OpenAI expands Daybreak with a higher-access tier for its cybersecurity model

   OpenAI has added a second, higher tier to its Daybreak cybersecurity program that gives approved partners access to a more capable cyber model. Engadget reports the model is less likely to refuse higher-risk tasks, indicating a meaningful change in how OpenAI is packaging and controlling advanced defensive cyber capabilities.

2. June 22, 2026 · Safety · 1 source

   OpenAI unveils GPT-5.5-Cyber update and launches Patch the Planet bug-fixing initiative

   Wired reports that OpenAI has introduced an updated cyber-focused model, GPT-5.5-Cyber, and a related initiative called Patch the Planet aimed at helping fix bugs in open-source software. The announcement comes amid heightened attention to the cybersecurity capabilities and risks of advanced AI systems, and is framed in part against Anthropic's cyber-oriented Mythos offering.