Introducing GPT-5.5

OpenAI Blog / 4/23/2026

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Key Points

  • OpenAI introduces GPT-5.5 as its newest and most capable model, emphasizing improved speed and performance.
  • The release is positioned as better suited for complex, multi-step tasks such as coding, research, and data analysis.
  • GPT-5.5 is described as being designed to work across tools, indicating broader applicability in workflow-based use cases.
  • The article frames GPT-5.5 as an upgrade intended to enhance end-to-end task execution rather than a narrow, single-purpose capability.
Introducing GPT-5.5, our smartest model yet—faster, more capable, and built for complex tasks like coding, research, and data analysis across tools.