OpenAI has launched GPT-5.5, boasting significant advancements in reasoning, coding, and scientific research. The new model offers enhanced planning, tool use, and self-correction, achieving 82.7% accuracy on Terminal-Bench 2.

So when it comes to models that the general public can access, GPT-5.5 has retaken the crown for OpenAI, achieving the state-of-the-art across 14 benchmarks.

Explore the new features of OpenAI's ChatGPT 5.5, including enhanced autonomous coding, better token efficiency, and ChatGPT Pro availability.

OpenAI has released GPT‑5.5, its most capable model yet, aimed at executing complex, multi‑step tasks with minimal user input. The model delivers significant gains in coding, computer use, knowledge work, and early scientific research while matching ...