Jay Parikh, executive vice president of CoreAI at Microsoft, speaks at a Siemens news conference at the Consumer Electronics Show in Las Vegas on Jan. 6, 2026. Microsoft is telling developers working on AI coding projects to rely on OpenAI's top-tier model over rival products as part of an effort to maximize efficiency. Tokens measure the scale of AI processing, with one token equal to about three-quarters of a word. Parikh, whose group includes GitHub, Visual Studio and Visual Studio Code, told staffers to default to OpenAI's flagship GPT-5.6 Sol when working in the GitHub Copilot coding tool, and use that model most of the time. Across the group, free cash flow dwindled in the latest quarter — and even went negative for Amazon and Alphabet.