Microsoft debuts Surface RTX Spark Dev Box to run large AI models without cloud costs

Microsoft on Monday unveiled the Surface RTX Spark Dev Box , a compact desktop computer designed to let software developers run large AI models on their desks instead of paying for cloud computing — a move that directly challenges the per-token pricing model that has defined the AI industry's economics since ChatGPT launched three and a half years ago. The device, announced at Microsoft Build 2026 , packs Nvidia’s new Blackwell-architecture RTX Spark processor and 128 gigabytes of unified memory into a small-form-factor chassis, delivering what Nvidia rates at one petaflop of AI compute. In practical terms, that means a developer can load, run and interact with AI models exceeding 120 billion parameters without sending a single API call to the cloud. "These class of devices, we think, will get to about 100 billion parameter model running," Pavan Davuluri, Microsoft's executive vice president of Windows and Devices, said during a press briefing ahead of the event. He emphasized that raw

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