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Introducing GPT-5.5
April 23, 2026
OpenAI introduced GPT-5.5, describing it as its smartest model yet and saying it is faster and more capable for complex tasks like coding, research, and data analysis across tools. The notable detail is that the release is positioned around tool use and higher-end workflows, suggesting a focus on practical performance gains rather than just benchmark improvements.
Introducing GPT-5.5, our smartest model yet—faster, more capable, and built for complex tasks like coding, research, and data analysis across tools.
Source: openai.com