CLAUDE.md to supercharge your workflow
| Feature | Claude (Anthropic) | Microsoft Copilot |
|---|---|---|
| Underlying model | Claude Sonnet 4.6 / Opus 4.7 | OpenAI GPT-4o / GPT-4 Turbo |
| Context window | 200,000 tokens (~150K words) | ~32,000–128,000 tokens (varies) |
| Web search / real-time data | ✗ No (API) | ✓ Built-in (Bing-powered) |
| Word / Excel integration | ✗ No native | ✓ Deep M365 integration |
| Teams / Outlook integration | ✗ No | ✓ Native (M365 Copilot) |
| Coding ability | Exceptional (SWE-bench top) | Good (GPT-4o level) |
| Complex reasoning / analysis | Excellent | Good |
| Long document analysis | 200K context — entire contracts | Limited by context window |
| Image understanding | ✓ Yes | ✓ Yes + image generation |
| Image generation | ✗ No | ✓ DALL-E 3 (Designer) |
| Free tier | ✓ claude.ai basic | ✓ Copilot.microsoft.com free |
| Pro pricing | $20/month (Claude Pro) | Free with M365 basic / $30/user M365 Copilot |
| API access | ✓ Full API (anthropic.com) | Via Azure OpenAI Service |
| Prompt caching (API) | ✓ Up to 90% savings | ✗ Not available |
| Data privacy (enterprise) | No training on inputs by default | ✓ M365 Data Boundary |
| SOC 2 / HIPAA compliance | ✓ Claude for Enterprise | ✓ Microsoft 365 compliance |
| Windows / Edge integration | ✗ No | ✓ Built into Windows 11 |
| Plan | Price | Key Features |
|---|---|---|
| Microsoft Copilot (free) | $0 | Web chat, Bing search, image gen, Windows integration |
| Microsoft 365 Copilot Enterprise | $30/user/mo | Word, Excel, Teams, Outlook AI — requires M365 Business |
| Copilot Studio | $200/tenant/mo | Build custom AI agents for your org |
| Claude.ai (free) | $0 | Claude Sonnet, limited messages |
| Claude Pro | $20/month | 5× more usage, priority access, Projects |
| Claude Max Power Users | $100/month | Unlimited Claude Code, 5× usage |
| Claude for Enterprise | Custom | SSO, fine-tuning, dedicated capacity, SOC 2 |
Microsoft has two distinct products with "Copilot" in the name. Microsoft Copilot (this comparison) is the general AI assistant in Windows, Edge, and Office 365, powered by GPT-4o. GitHub Copilot is a coding-specific tool for IDE autocomplete and PR review, powered by OpenAI Codex/GPT-4o. They are different products with different pricing. See the Claude vs GitHub Copilot comparison if you're evaluating coding tools specifically.
For developers, researchers, and knowledge workers who need deep AI capability, Claude is the stronger choice: better reasoning, larger context, superior coding, and a more reliable API. For enterprise teams already in the Microsoft 365 stack, Microsoft Copilot's native Office integration justifies the $30/user premium — meeting summaries in Teams, drafts in Word, and formula help in Excel happen without leaving the app you're already in. The two products serve different primary personas. If your team uses both MS Office and writes code, consider Claude Pro ($20/mo) alongside the free Microsoft Copilot tier before committing to M365 Copilot. Check our full pricing comparison for exact cost modelling.
Is Claude better than Microsoft Copilot?
For raw AI capability — complex reasoning, coding, long-document analysis, and instruction-following — Claude is stronger. Microsoft Copilot's edge is ecosystem integration: it works inside Word, Excel, Teams, and Outlook in ways Claude simply doesn't. The "better" tool depends on your primary use case.
Is Microsoft Copilot free?
The base Microsoft Copilot at copilot.microsoft.com is free, and it's built into Windows 11 and the Edge sidebar. Microsoft 365 Copilot — the version with deep Office integrations (Word, Excel, Teams, Outlook) — costs $30/user/month on top of a Microsoft 365 Business plan. Claude.ai's free tier is also available with no credit card required.
Which AI is better for Excel and spreadsheets?
Microsoft Copilot for M365 wins clearly for Excel — it can write and insert formulas, generate charts, and summarize data directly inside Excel without copying content out. Claude is better for complex spreadsheet analysis when you paste data into it, but it can't write formulas back into your spreadsheet natively. If Excel automation is your primary need, M365 Copilot is worth the premium.
What model does Microsoft Copilot use?
Microsoft Copilot uses OpenAI's GPT-4o and GPT-4 Turbo models via Microsoft's multi-billion dollar partnership with OpenAI and Azure OpenAI Service. Claude uses Anthropic's own Claude model family (Haiku 4.5, Sonnet 4.6, Opus 4.7) — entirely separate models trained on different principles, including Anthropic's Constitutional AI approach.
Is Microsoft Copilot safe for business use?
Microsoft 365 Copilot uses Microsoft's EU Data Boundary and existing M365 compliance frameworks (SOC 2, HIPAA, ISO 27001) — so if your M365 tenant is already compliant, Copilot for M365 inherits those protections. Claude for Enterprise also offers SOC 2 compliance and a zero-data-retention policy by default. Both are considered enterprise-safe; the right choice depends on your existing compliance framework.