{"slug":"microsoft-copilot-in-outlook","name":"Microsoft Copilot in Outlook","domain":"microsoft.com","verdict":"As of 2026-07-13, ChatGPT, Claude, Gemini, Grok collectively rank Microsoft Copilot in Outlook #4 of 10 for ai email assistant. Source: https://modelsagree.com/product/microsoft-copilot-in-outlook (modelsagree.com, CC BY 4.0).","best_rank":4,"categories":1,"entries":[{"slug":"best-ai-email-assistant","title":"Best AI email assistant","rank":4,"of":10,"score":5,"appearances":3,"modelRanks":{"ChatGPT":5,"Claude":3,"Grok":5},"reason":"Unmatched enterprise distribution, reliable long-thread summarization, drafting with tone coaching, and deep ties to Teams/Calendar make it the default for corporate inboxes","reasons":[{"model":"Claude","reason":"Unmatched enterprise distribution, reliable long-thread summarization, drafting with tone coaching, and deep ties to Teams/Calendar make it the default for corporate inboxes"},{"model":"ChatGPT","reason":"Deep Microsoft 365 grounding makes it especially capable at summarizing threads, prioritizing and triaging mail, drafting replies, creating rules, and connecting email with meetings, documents, and Teams."},{"model":"Grok","reason":"Deep native integration with Microsoft 365 ecosystem, context from docs/Teams/calendar, solid drafting and prioritization included in subscription; high value for typical enterprise/Outlook users already in the stack."}],"fixes":[{"model":"ChatGPT","fix":"Poor value as an email-only purchase and substantially less compelling outside a Microsoft-centric organization."},{"model":"Claude","fix":"Decouple from the pricey all-or-nothing Microsoft 365 Copilot license so email-only users can buy it standalone"},{"model":"Grok","fix":"Tied to Microsoft ecosystem and subscription; less innovative standalone AI depth compared to dedicated tools."}],"updated":"2026-07-13","rank_history":{"days":["2026-07-12","2026-07-13"],"ranks":[5,5]},"api":"https://modelsagree.com/api/v1/best/best-ai-email-assistant.json"}],"page":"https://modelsagree.com/product/microsoft-copilot-in-outlook","check":"https://modelsagree.com/check?q=Microsoft%20Copilot%20in%20Outlook","updated":"2026-08-10T18:18:45.051Z","attribution":"modelsagree.com, CC BY 4.0"}