Microsoft has announced full support for the release of OpenAI’s open-weight gpt‑oss models—gpt‑oss‑120b and gpt‑oss‑20b—through its Azure AI Foundry and Windows AI Foundry platforms, marking a major leap in model accessibility and customization. According to the Microsoft Azure Blog, developers can now fine-tune, optimize, and deploy these models either in the cloud or directly on local Windows systems using Foundry Local and Windows AI Foundry. These models are purpose-built for flexible deployment: gpt‑oss‑120b offers high-performance reasoning on enterprise GPUs, while gpt‑oss‑20b is optimized for agentic tasks and efficient inference on Windows PCs with 16GB+ VRAM or edge devices. Azure AI Foundry provides comprehensive tooling— including CLI endpoints, fine-tuning, quantization, and model distillation—empowering users to customize AI models for tailored workflows, domain-specific use cases, or secure on-device applications. This integration signals a new era where AI is not just a service but the core of the development stack. It offers developers sovereignty, transparency, and scalable deployment choices across cloud and edge environments.