Microsoft 365 Copilot Core Features Compared with Gemini, ChatGPT and Claude in 2026

What Microsoft 365 Copilot Bundles

Copilot appears inside Word, Excel, PowerPoint, Outlook, Teams and other Microsoft 365 apps. It can draft text, summarise threads, generate formulas or charts from described data, create presentations from documents, and answer questions about content the user already has permission to see. A separate Copilot chat experience can search across allowed files and emails.

Inside Individual Applications

In Word it helps rewrite, expand or summarise documents. In Excel it can suggest formulas, create pivot tables or visualisations from natural-language requests. In Outlook it drafts replies and summarises long email threads. In Teams it can summarise meetings (when transcription is enabled) and extract action items.

Cross-Application Context

A distinguishing feature is the ability to ground responses in the user’s own Microsoft 365 data (emails, files, chats) subject to existing permissions and organisational policies. This reduces the need to copy content into a separate tool.

How Main Alternatives Differ

Google Gemini for Workspace integrates with Gmail, Docs, Sheets and Meet. It performs similar drafting and summarisation tasks and can use content stored in Google Drive when permissions allow.

ChatGPT (Team or Enterprise plans) and Claude (via Anthropic’s enterprise offerings or partner integrations) are general-purpose assistants. They excel at open-ended writing, analysis and coding help but typically require users to upload or paste content unless a custom connector or enterprise search integration has been configured.

Where Each Stops Being Useful

Microsoft 365 Copilot is most useful for people who already work primarily inside Microsoft 365. It stops being convenient when the majority of work happens in Google Workspace, when a specialised non-Microsoft tool is required, or when organisational policies restrict the data Copilot may access.

Gemini is useful inside Google Workspace. It becomes less relevant for organisations standardised on Microsoft 365.

ChatGPT and Claude are useful for tasks that do not depend on live access to an organisation’s email and file stores, or when users prefer a standalone interface. They stop being the lowest-friction option when frequent grounding in private Microsoft 365 or Google content is required without additional setup.

In 2026 the practical choice continues to depend on which productivity suite an organisation already uses and how strictly data must stay inside existing permission boundaries. No single product is best for every workflow.