Microsoft Copilot

Microsoft Copilot is an AI assistant developed by Microsoft and integrated across its suite of consumer and enterprise products, including Windows, Microsoft 365, Microsoft Edge, GitHub, and Azure. Built on large language models developed by OpenAI — primarily the GPT series — and enhanced with Microsoft's own research into grounding, retrieval, and safety, Copilot provides conversational, context-aware assistance for writing, coding, data analysis, image generation, and task automation.

Background and Development

Microsoft announced a major AI integration initiative in 2023, following a multibillion-dollar investment in OpenAI. The first broadly available version of Copilot appeared within Microsoft Bing as an AI-powered search experience, which was subsequently rebranded and expanded. By late 2023, Copilot became available as a standalone experience accessible via a dedicated URL, as a dedicated application for Windows and mobile, and as a sidebar feature within Microsoft Edge.

The Microsoft 365 Copilot subscription tier, targeting enterprise customers, brings the assistant directly into Word, Excel, PowerPoint, Outlook, Teams, and OneNote, giving it access to a user's calendar, emails, documents, and meeting transcripts via Microsoft Graph — Microsoft's unified data access layer for enterprise content.

Core Capabilities

Within Microsoft 365, Copilot drafts emails and documents in Outlook and Word using context drawn from the user's existing files and correspondence. In Excel, it performs data analysis, generates formulas, and creates charts from natural-language requests. In PowerPoint, it creates presentation slides from a written brief or an existing Word document. In Teams, it summarises meeting transcripts, identifies action items, and responds to questions about meeting content even if the user was not present for the meeting itself.

The Edge browser includes a Copilot sidebar that can summarise open web pages, compare products across tabs, draft responses to web forms, and answer questions about page content without requiring the user to navigate away from the current page.

Windows Copilot integrates into the operating system itself, allowing users to adjust system settings, manage files, and launch applications through natural-language commands. An opt-in voice trigger enables hands-free activation for Windows users.

Autonomous Agents

A significant development in 2025 was the introduction of Copilot agents, which can execute multi-step tasks autonomously on behalf of users within Microsoft 365. These agents can be created by enterprise administrators or end-users through Copilot Studio, a low-code development environment for building custom AI workflows. Copilot Studio supports integration with external data sources, APIs, and business systems, enabling agents that can, for example, process a purchase order end-to-end across multiple enterprise applications.

Copilot Tuning, released in 2025, allows organisations to fine-tune Copilot behaviour using their own documents and data, producing a model variant aligned to company-specific terminology, policies, and communication styles.

GitHub Copilot

A distinct but related product, GitHub Copilot, provides AI-assisted code completion and generation within integrated development environments including Visual Studio Code, JetBrains IDEs, and Visual Studio. GitHub Copilot uses models trained specifically on code and is among the most widely adopted AI development tools globally. Its features include inline code suggestions, an AI chat panel for explaining or refactoring code, and automated pull-request summaries.

Azure AI and Copilot Studio

Microsoft's Azure cloud platform hosts the infrastructure underlying Copilot and exposes the same models to enterprise developers via Azure OpenAI Service. Organisations can build custom Copilot experiences for their own applications using Azure AI Foundry, grounding responses in proprietary data through retrieval-augmented generation and enforcing content safety policies via Azure AI Content Safety.

References

1. Microsoft. (2023). Introducing Microsoft 365 Copilot — your copilot for work. Microsoft 365 Blog.
2. Microsoft. (2025). Microsoft Ignite 2025: Copilot and agents built to power the Frontier Firm. Microsoft 365 Blog.
3. Microsoft. (2025). What's New in Copilot Studio: November 2025 Updates and Features. Microsoft Copilot Blog.
4. VentureBeat. (2025). Microsoft Copilot gets 12 big updates for fall. VentureBeat.
5. GitHub. (2024). GitHub Copilot documentation. GitHub Docs.