OpenAIGPT-5 Pro is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. It is optimized for complex tasks that require step-by-step reasoning, instruction following, and accuracy in high-stakes use cases. It supports test-time routing features and advanced prompt understanding, including user-specified intent like think hard about this. Improvements include reductions in hallucination, sycophancy, and better performance in coding, writing, and health-related tasks.
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