# Microsoft Copilot vs Glean: which do AI models recommend for Enterprise AI, October 2026

IT AI Recommendation Index, October 2026 Edition, Enterprise AI assistants. One of fourteen models named Microsoft Copilot first on the direct prompt; one named Glean. Page: https://it-ai-index.com/it-data/enterprise-ai-assistants/microsoft-copilot-vs-glean/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Microsoft Copilot | 6% | #4 of 7 | 6% | 16 | 11 of 14 |
| Glean | 6% | #5 of 7 | 6% | 16 | 7 of 14 |

## The direct prompt, model by model

- Grok 4.1 Fast: microsoft copilot first (first choices: Microsoft Copilot) (alternatives: Glean, Gong, Salesforce Einstein)
- Gemini 3.5 Flash: glean first (first choices: Glean, Microsoft 365 Copilot) (alternatives: 1mind, ChatGPT Team or Enterprise, Moveworks)
- Claude Haiku 4.5: neither first, one named (first choices: 1mind, AI Hive) (alternatives: Gong, Microsoft Copilot)
- GPT-5.4 mini: neither first, one named (first choices: ChatGPT) (alternatives: Gemini for Workspace, Google Gemini, Microsoft Copilot)
- Perplexity Sonar: neither first, one named (first choices: HubSpot with Breeze AI) (alternatives: Artisan, Glean, Microsoft 365 Copilot, Regie.ai, Writer, ZoomInfo)
- Qwen 3.7 Flash: neither first, one named (first choices: HubSpot Breeze AI) (alternatives: Apollo, Chorus, Clay, Gong, Microsoft Copilot, Salesforce Einstein, Slack AI)
- Mistral Small: neither named (first choices: Gong) (alternatives: ChatGPT, HubSpot AI, Monday.com Revenue AI OS)
- DeepSeek V4 Flash: neither named (first choices: Microsoft 365 Copilot) (alternatives: ChatGPT, Claude, Glean Assistant, Google Gemini)
- Llama 4 Maverick: neither named
- Kimi K2: neither named (first choices: Microsoft 365 Copilot) (alternatives: Gong)
- GLM 4.7 FlashX: neither named (first choices: Microsoft 365 Copilot) (alternatives: Gong, HubSpot Breeze AI, Monday CRM with AI)
- MiniMax M2.5: neither named
- GPT-6 Luna: neither named (first choices: ChatGPT) (alternatives: Google Workspace with Gemini, Microsoft 365 Copilot)
- Muse Glimmer 30B: neither named (first choices: HubSpot Breeze AI) (alternatives: Gong Revenue AI OS, Intercom, Respond.io)

## What the models said about Microsoft Copilot

- "Avoid Microsoft Copilot unless you're already heavily invested in Microsoft 365" (Kimi K2, budget prompt, hard negative)
- "If you're already in the Microsoft ecosystem and want the fastest rollout with minimal extra cost, Microsoft Copilot (Power Virtual Agents) is a solid default." (MiniMax M2.5, paraphrase prompt, first choice)
- "If 90% of your company's work happens in Microsoft Teams and Outlook, Microsoft Copilot is the default choice." (Gemini 3.5 Flash, comparative prompt, first choice)
- "If general productivity, go Microsoft Copilot (versatile, high adoption)." (Grok 4.1 Fast, direct prompt, first choice)

## What the models said about Glean

- "Avoid over-investing in "enterprise-only" platforms like Glean or Moveworks" (Kimi K2, paraphrase prompt, soft negative)
- "Best Overall for Connected Knowledge & Search: Glean ... Glean is the gold standard." (Gemini 3.5 Flash, paraphrase prompt, first choice)
- "Glean: Best for Cross-Platform Knowledge & "Universal Search"" (Gemini 3.5 Flash, direct prompt, first choice)
- "Top Recommendation: Glean" (DeepSeek V4 Flash, paraphrase prompt, first choice)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.