OpenAI's DayBreak program ships GPT-5.5-Cyber for closed-loop vulnerability remediation, scanning 30M commits across 30K codebases and delivering pull requests for human review instead of reports. Two research releases show 3B and 0.22B models matching frontier models on reasoning and image inpainting, sharpening the ROI case against default frontier-API usage for well-scoped tasks. Google DeepMind commits $10 million to multi-agent safety research targeting emergent behaviors between interacting agent networks — the risk surface that single-model safety training doesn't address.