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Microsoft brings OpenAI’s smallest open model to Windows users


Microsoft will bring OpenAI's new free and open GPT model, gpt-oss-20b, to Windows 11 users via Windows AI Foundry, its platform that lets users tap AI features, APIs, and popular open-source models on their computers.

The company said in a blog post that gpt‑oss-20b is “tool-savvy and lightweight,” adding: “Optimized for agentic tasks like code execution and tool use, it runs efficiently on a range of Windows hardware, with support for more devices coming soon. OpenAI said the model was trained using high-compute reinforcement learning, which helps it excel at powering AI agents and call tools, such as web search or Python code execution, as part of its chain-of-thought process. He covered North American and European M&A, equity, regulatory news and debt markets at Reuters and Acuris Global, and has also written about travel, tourism, entertainment and books.

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