GPT 5.5 Bro [video] OpenAI released GPT 5.5, a major update to its large language model, in a video announcement on YouTube. The new model introduces enhanced reasoning capabilities and improved factual accuracy over its predecessor. The release signals another leap in AI performance, intensifying competition among leading AI developers. About Press Copyright Contact us Creators Advertise Developers Impressum Cancel Memberships Terms Privacy Policy & Safety How YouTube works Test new features © 2026 Google LLC