Models
April 23, 2026

OpenAI introduces GPT 5.5

OpenAI introduced GPT 5.5, its smartest model yet, designed for coding, research, and complex workflows. It delivers stronger reasoning, better tool use, and improved efficiency across real world tasks.

OpenAI has launched GPT 5.5, its most advanced AI model to date, built to handle complex, multi step tasks across coding, research, and knowledge work. The model improves reasoning, planning, and tool use, allowing it to operate across applications like spreadsheets, documents, and development environments.

It achieves state of the art performance on benchmarks that measure real world workflows, including command line tasks and software engineering challenges. GPT 5.5 is also more efficient, producing higher quality outputs with fewer retries.

This release reflects a shift toward agent like systems that can complete work with minimal human input.

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OpenAI

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