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Developers have been comparing the strengths and weaknesses of Anthropic’s Claude Code, Anysphere’s Cursor, and Microsoft’s GitHub Copilot for months now, looking for a winner. While no individual AI coding tool manages to be the best at every task that software developers do each day, Claude Code is increasingly coming out on top for its ease of use, both for developers and nontechnical users.
It seems like Microsoft agrees, as sources tell me the company is now encouraging thousands of its employees from some of its most prolific teams to pick up Claude Code and get coding, even if they’re not developers.
Microsoft first started adopting Anthropic’s Claude Sonnet 4 model inside its developer division in June last year, before favoring it for paid users of GitHub Copilot several months later. Now, Microsoft is going a step beyond using Anthropic’s AI models and widely adopting Claude Code across its biggest engineering teams.
Microsoft’s CoreAI team, the new AI engineering group led by former Meta engineering chief Jay Parikh, has been testing Claude Code in recent months, and last week Microsoft’s Experiences + Devices division were being asked to install Claude Code. This division is responsible for Windows, Microsoft 365, Outlook, Microsoft Teams, Bing, Edge, Surface, and more.
Even employees without any coding experience are being encouraged to experiment with Claude Code, to allow designers and project managers to prototype ideas. Microsoft has also approved the use of Claude Code across all of its code and repositories for its Business and Industry Copilot teams.
Software engineers at Microsoft are now expected to use both Claude Code and GitHub Copilot and give feedback comparing the two, I’m told. Microsoft sells GitHub Copilot as its AI coding tool of choice to its customers, but if these broad internal pilot programs are successful, then it’s possible the company could even eventually sell Claude Code directly to its cloud customers.
Microsoft is now one of Anthropic’s top customers, according to a recent report from The Information. The software maker is also counting selling Anthropic AI models toward Azure sales quotas, which is unusual given Microsoft typically only offers its salespeople incentives for homegrown products or models from OpenAI.
Microsoft’s decision to adopt Claude Code more broadly among its engineering teams certainly looks like a vote of confidence in Anthropic’s AI tools over its own, especially as it’s encouraging nontechnical employees to try out coding. But the reality is that Microsoft’s developers are likely to use a mix of AI tools, and adopting Claude Code is another part of that tool set.
“Companies regularly test and trial competing products to gain a better understanding of the market landscape,” says Frank Shaw, Microsoft’s communications chief, in a statement to Notepad. “OpenAI continues to be our primary partner and model provider on frontier models, and we remain committed to our long-term partnership.”
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