OpenAI DevDay 2026: What to Watch Today
OpenAI’s DevDay 2026 takes place today, September 29, at Fort Mason in San Francisco — with reporting pointing to a dozen product announcements, a GPT-6 Cyber security model, and a leaked persistent assistant called “o”. Full preview in the slides above. Sources: Fortune via AlexTech.ai, TestingCatalog, TechGig, Tech Featured — September 25–28, 2026.