OpenAI on April 24, 2026, released GPT-5.5, calling it the company’s first base model trained entirely from scratch rather ...
OpenAI Releases GPT-5.5, a Fully Retrained Agentic Model That Scores 82.7% on Terminal-Bench 2.0 and 84.9% on GDPval ...
OpenAI released GPT-5.5 in May 2026, calling it the most capable AI model the company has ever built. The new model sits ...