gpt-5-pro

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About this model

gpt-5-pro uses more compute to think harder and provide consistently better answers.

Key model capabilities

• Designed for logic-heavy and multi-step tasks.
• Since gpt-5-pro is designed to tackle tough problems, some requests may take several minutes to finish.
• As OpenAI's most advanced reasoning model, gpt-5-pro defaults to (and only supports) reasoning.effort: high.
• New "allowed tools" tool choice that enables you to specify multiple tools in the tool choice instead of just one.
• New "preamble" support, allowing the model to "think" before calling a tool. This is always enabled and controlled through prompting.
• gpt-5-pro does not support code interpreter.