# Enterprise AI assistants for enterprise buyers: what AI models recommend, October 2026

IT AI Recommendation Index, October 2026 Edition. Asked as "enterprise AI assistant" and as "company-wide AI chatbot for employees", six framings each, to fourteen models with search on, on behalf of an enterprise B2B company. Added to the October 2026 Edition on October 4, 2026; its answers are read by the distilled judge (ai-indexes-judge-qwen3-14b-run3), not the claude-opus-5 judge of the earlier categories. Page: https://it-ai-index.com/it-data/enterprise-ai-assistants/enterprise/

**Standing:** Microsoft 365 Copilot leads with 40% of first choices; verdict contested. 50 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| # | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | Microsoft 365 Copilot | 40% | 5% | 44 |
| 2 | ChatGPT | 22% | 30% | 54 |
| 3 | Glean | 10% | 14% | 21 |
| 4 | Amazon Q | 8% | 5% | 19 |
| 5 | Google Gemini for Workspace | 2% | 0% | 10 |
| 6 | Google Gemini | 2% | 32% | 28 |
| 7 | Claude | 2% | 39% | 31 |

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: ChatGPT; alternatives 1mind, BuildBetter, Claude for Enterprise, Gong
- GPT-5.4 mini: Microsoft 365 Copilot; alternatives Anthropic Claude via AWS Bedrock, Google Gemini, OpenAI Frontier / enterprise platform
- Gemini 3.5 Flash: Glean; alternatives ChatGPT, Claude for Enterprise, HubSpot Breeze AI, Microsoft 365 Copilot
- Perplexity Sonar: ChatGPT; alternatives Amazon Q, Claude, Salesforce Agentforce
- Grok 4.1 Fast: Microsoft Copilot; alternatives ChatGPT, Glean, Google Gemini for Workspace
- Mistral Small: Aisera, ChatGPT; alternatives Google Vertex AI
- DeepSeek V4 Flash: Glean; alternatives ChatGPT, Microsoft 365 Copilot, Moveworks, Sana
- Llama 4 Maverick: Decagon; alternatives Amazon Q, ChatGPT, HubSpot
- Qwen 3.7 Flash: ChatGPT, Microsoft 365 Copilot; alternatives Claude, Google Gemini, HubSpot Breeze AI, Intercom Fin
- Kimi K2: Microsoft Copilot for Enterprise; alternatives ChatGPT, Glean, Google Gemini for Workspace, Salesforce Agentforce
- GLM 4.7 FlashX: ChatGPT, Microsoft 365 Copilot; alternatives Claude, Google Gemini
- MiniMax M2.5: no first choice; alternatives 6sense, ActiveCampaign, Cognism, Glean
- GPT-6 Luna: ChatGPT; alternatives Google Gemini, Microsoft Copilot, Salesforce Agentforce
- Muse Glimmer 30B: Microsoft 365 Copilot; alternatives ChatGPT, Claude, Google Gemini, ServiceNow Virtual Agent

## Sources the answers cite

76 of 84 answers came back with a source list, from 14 of 14 models. Sites named in the most answers:

- coworker.ai: 30 answers, 43 citations
- resources.rework.com: 27 answers, 29 citations
- glean.com: 22 answers, 36 citations
- intuitionlabs.ai: 21 answers, 32 citations
- microsoft.com: 17 answers, 33 citations
- openai.com: 15 answers, 21 citations
- slite.com: 15 answers, 15 citations
- wonderchat.io: 14 answers, 17 citations

Pages named in the most answers:

- https://resources.rework.com/tools/ai-tools/best-ai-tools-for-enterprise-2026 (25 answers)
- https://coworker.ai/blog/best-enterprise-ai-assistant-2026 (16 answers)
- https://slite.com/learn/ai-assistants-for-business (14 answers)
- https://intuitionlabs.ai/articles/enterprise-ai-assistants-comparison (13 answers)
- https://perceptis.ai/blog/best-enterprise-ai-software-in-2026-top-tools-by-category (13 answers)
- https://xpander.ai/blog/top-enterprise-personal-ai-assistant-platforms (13 answers)
- https://wonderchat.io/blog/b2b-ai-platform-comparison (11 answers)
- https://ajelix.com/ai/enterprise-chatbots (9 answers)
- https://glean.com/perspectives/9-key-questions-for-evaluating-ai-assistant-vendors-in-2026 (9 answers)
- https://monday.com/blog/crm-and-sales/enterprise-ai-tools-for-b2b-sales-workflows (9 answers)

## Warned against

- ChatGPT: 16 of 54 labels negative. "The clearest *avoid or heavily scrutinize* cases are: - Consumer accounts used for work such as personal ChatGPT, Claude, or Gemini accounts" (Perplexity Sonar, negative prompt)
- Google Gemini: 9 of 28 labels negative. "such as personal ChatGPT, Claude, or Gemini accounts, because they typically sit outside company-owned identity, policy, and retention controls" (Perplexity Sonar, negative prompt)
- Claude: 12 of 31 labels negative. "such as personal ChatGPT, Claude, or Gemini accounts, because they typically sit outside company-owned identity, policy, and retention controls" (Perplexity Sonar, negative prompt)
- Microsoft Copilot: 4 of 9 labels negative. "assess the actual enterprise SKU and settings rather than assuming the consumer version’s terms apply" (GPT-6 Luna, negative prompt)

## Record

- Method: https://it-ai-index.com/methodology/
- Raw judge labels and full responses: https://it-ai-index.com/data/
- License: CC BY 4.0. Cite as IT AI Recommendation Index, October 2026 Edition, it-ai-index.com.