Foundational reasoning model trained with reinforcement learning to think step-by-step before responding. Forms rich internal chains of reasoning to tackle complex problems in mathematics, coding, and scientific domains with thoughtful deliberation.
- Deep reasoning foundation using reinforcement learning for step-by-step problem analysis
- Rich internal reasoning chains forming thoughtful deliberation before delivering answers
- Complex problem specialization excelling in mathematics, coding, and scientific challenges
- Multimodal reasoning support handling both text and visual inputs with analytical depth
- Established reasoning benchmark serving as the foundation for OpenAI's reasoning model development
Model Information
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GPT 5.2GPT-5.2 is OpenAI’s flagship model for coding, reasoning, and agentic tasks across industries, offering an expanded context window and strong performance for complex multi-step workflows with advanced tool support.
GPT 5.1OpenAI's latest GPT-5.1 released November 2025, featuring smarter and more conversational AI with dynamic reasoning adjustment. Outperforms both GPT-4.1 and GPT-5 while running 2-3x faster with improved coding capabilities and steerability.
GPT 5OpenAI's most advanced unified model released August 2025, combining reasoning and fast response capabilities in one system. Features adaptive routing that automatically switches between instant answers and deep thinking based on task complexity, achieving 94.6% on AIME 2025 and 74.9% on SWE-bench Verified.