Criterion Claude Microsoft Copilot
CategoryAI Chatbots & AssistantsAI Chatbots & Assistants
In one sentenceAnthropic's AI assistant for writing, analysis, coding and research, available on web, desktop and mobile.Microsoft's AI assistant, free on its own and built into Word, Excel, PowerPoint and Outlook through Microsoft 365 plans.
Problem it solvesHelps people write, analyse documents and code with an assistant that can also create files and connect to other apps.Brings AI help into the Office apps people already use for documents, spreadsheets, slides and email.
Free planYesYes
Developer APIYes — docsNo
Open sourceNoNo
PlatformsWeb, Desktop, iOS, Android, Chrome extension, CLI (Claude Code)Web, Windows, iOS, Android, Microsoft 365 apps
Pricing (summary)Free costs nothing; Pro is $20/month or $17/month billed annually. Max starts at $100/month, Team is $25/$20 per standard seat and $125/$100 per premium seat, and Enterprise is $20/seat billed annually plus usage at API rates.
Checked 2026-10-19		The Copilot app is free with limited usage. Microsoft 365 Personal ($9.99/month), Family ($12.99/month) and Premium ($19.99/month) add Copilot in Office apps. Businesses can buy bundles with Copilot or a Copilot Business add-on per user.
Checked 2026-10-19
Strengths
  • Generous feature set on the free plan
  • Clear per-seat team pricing
  • Large context window on Opus 5.5 (1M tokens per Anthropic docs)
  • Deep Office integration
  • Bundles storage and Office apps
  • Business add-on priced per user
Limitations
  • Session-based limits can run out during heavy use
  • Opus and Fable access require a paid plan
  • Max plans are monthly billing only
  • Models used per plan are not named on pricing pages
  • Family plan AI features are owner-only
  • No AI features in Microsoft 365 Basic