Microsoft Copilot Adds Anthropic Claude Sonnet — Ending OpenAI Exclusive

Microsoft has officially added Anthropic's Claude Sonnet to Microsoft 365 Copilot Chat's "Frontier" tier, ending OpenAI's exclusive relationship with the productivity giant. For the millions of Indian enterprise users who live inside Microsoft 365 — Outlook, Teams, Word, Excel, PowerPoint — this is the biggest AI choice expansion since Copilot launched.

What Changed

Until now, Microsoft 365 Copilot exclusively used OpenAI's GPT models. The April 2026 update adds:

• Claude Sonnet available alongside GPT-5.4 in Copilot Chat
• Users can select their preferred model per conversation
• Enterprise admins can set default models by department
• Both models access the same Microsoft 365 Graph (emails, documents, calendar)

Concurrent Copilot Studio updates:

• Multi-agent orchestration: Multiple specialized agents working together on complex workflows
• Agents in Teams meetings: Real-time access to meeting transcripts, answering live questions
• Azure File Share integration: Copilot can retrieve and summarize files from Azure storage
• Evaluation APIs generally available: CI/CD-friendly testing for agent quality

India Enterprise Impact

India is one of Microsoft's largest enterprise markets. Key local implications:

TCS, Infosys, Wipro, HCL, Tech Mahindra: These Indian IT giants have standardized on Microsoft 365 for their global workforces. Adding Claude = hundreds of thousands of Indian knowledge workers get Claude access inside their daily tools.

Indian banks and BFSI: Most Indian banks (HDFC, ICICI, SBI, Axis, Kotak) run on Microsoft 365. Claude's superior long-document analysis helps with loan documentation, compliance, and regulatory reporting.

Indian government: Large chunks of state and central government agencies use Microsoft 365. Claude access enables Hindi and regional-language analysis where Gemini has been strong.

MSMEs via Copilot Pro: Small and medium Indian businesses using Microsoft 365 Business Standard (Rs 1,200/user/month) get access as part of Copilot add-ons.

The Multi-Model Future

Microsoft's strategy of offering multiple AI models (OpenAI + Anthropic now, likely more later) represents a broader industry shift. Single-vendor AI dependencies are becoming less common:

• Microsoft Copilot: OpenAI + Anthropic
• Cursor: OpenAI + Anthropic + Gemini choice per message
• Perplexity: Multiple models selectable by Pro users
• OpenRouter: 200+ models via single API

For Indian enterprises, multi-model reduces vendor lock-in risk and optimizes capability by task.

India-Specific Announcements

Microsoft India has additionally announced:

$3B India investment (separate from this Copilot update): Indian data center expansion, Azure region additions in Pune and Chennai, skilling programs reaching 10 million Indians.

Azure India AI adoption: Over 60% of Indian Forbes 2000 companies now use Azure AI services in some form.

Indian language model work: Microsoft Research India is building Indic language variants of OpenAI and Anthropic base models for regional deployment.

What Indian Professionals Should Do

If you use Microsoft 365 daily: Copilot Chat with Claude is genuinely different from ChatGPT. Test both on your actual work — long document analysis, complex email drafting, code review.

For IT decision-makers: Consider rolling out Copilot across the organization. The Rs 1,400-2,200 per user per month is reasonable given productivity gains.

For SMBs: Copilot Pro at Rs 1,800/user/month makes sense for teams already on Microsoft 365 Business.

Pricing in India

Tier	Price	Features
Microsoft 365 Copilot	Rs 2,200/user/month	Full Copilot in all apps, Claude + GPT choice
Copilot Pro (individual)	Rs 1,800/month	Individual professionals
Copilot Chat (basic)	Included with M365	Limited daily usage

See our Chat AI tools comparison for full market context.

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Source: Microsoft Copilot blog, Microsoft Learn documentation (April 2026)