Microsoft rolls out Copilot Cowork more broadly and lets AI models check each other's work

THE DECODER / 3/31/2026

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Key Points

  • Microsoft 365 Copilot is expanding access to “Copilot Cowork,” an AI assistant designed to carry out complete workflows on its own rather than only assisting step-by-step.
  • The rollout also includes a new research capability where multiple AI models can review and check each other’s work.
  • The updates suggest Microsoft is pushing toward more autonomous, end-to-end task execution while adding internal validation mechanisms.
  • By broadening Copilot Cowork and introducing model-to-model checking, Microsoft aims to improve both productivity and reliability for enterprise knowledge work.

With "Cowork," Microsoft 365 Copilot is getting an AI assistant that handles entire workflows on its own. A new research tool also lets multiple AI models check each other's work.

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