Open models by OpenAI | OpenAIAdvanced open-weight reasoning models to customize for any use case and run anywhere.Permissive licenseThese models are supported by the Apache 2.0 license. Build freely without worrying about copyleft restrictions or patent risk—whether you're experimenting, customizing, or deploying commercially.Designed for agentic tasksLeverage powerful instruction following and tool use within the chain-of-thought, including web search and Python code execution.Deeply customiza...