For three years, enterprise AI has followed one pattern: ask the assistant, then copy the answer into the tool where the work happens. That tool has almost always been Microsoft’s. However, recently, the AI vendors decided to stop being a side window. OpenAI introduced a shared workspace inside ChatGPT on September 29. On November 10, Anthropic followed with Claude Whiteboards, Claude Sheets, and Claude Meetings in beta, and moved Claude Dashboards to general availability as Claude Data. Meta is in the mix too, with a Muse agent that builds small apps on the fly.
None of the three has Microsoft’s installed base. Together, though, they are contesting the one thing that base was built on: the place where a vague idea becomes a plan, a budget, a deck, or a dashboard. For enterprises that have standardized on Microsoft 365, that is both a competitive opportunity and a governance problem.
Why the AI vendors are moving now
The motive is easy to see. A chatbot is a place people visit for answers. A workspace is a place where work lives, accumulates, and gets shared, which makes it far stickier and far more valuable. Anthropic says the old pattern, in which results had to be moved to another program where Claude could not follow progress or changes, was the problem it set out to fix. Its answer is to keep documents, boards, sheets, and dashboards inside Claude, with teammates editing alongside the assistant.
What Anthropic shipped
Claude Whiteboards is a shared board where a team can talk through a messy plan and have Claude turn it into a timeline with owners and dates. In a retro, everyone adds notes and Claude groups them by theme and drafts action items. When the session ends, the board can become a doc or deck, or move into tools.
Claude Sheets builds spreadsheets with tabs, formulas, formatting, and drop-downs from a prompt such as a campaign tracker or a hiring budget, and it edits cells while outlining each change. Anthropic is candid that functionality is simple for now. Users who need more can export to .xlsx or CSV or use Claude for Excel.
Claude Meetings adds Claude to a video call as a visible participant. As people talk, it can draft the plan, build a timeline on a whiteboard, answer questions in the meeting chat, and pull figures such as last year’s numbers from connected apps. It announces itself in the meeting chat, stays out of calls with external guests unless an admin authorizes it, and leaves automatically if an external guest joins. It is in beta on Team and Enterprise plans and, at launch, works with Google Meet.
Claude Data, the renamed and now generally available Claude Dashboards, connects Claude to warehouses and CRMs and answers questions with dashboards, written data stories, or narrated videos. Certified queries, which let a data team bless the metric definitions everyone should use, and live sharing, which shows colleagues current numbers without giving them the underlying connector access, are still in beta. Interactive connectors also now open apps such as Adobe, Atlassian, Box, Notion, and HubSpot beside the conversation.
What OpenAI and Meta are doing
OpenAI’s approach is a drive that feels alive. At its DevDay on September 29, CEO Sam Altman described Space as a place where pages and files live together and where a page can be told to check a team channel and update itself. Pages is its word processor, and collaborative Slides can be generated by talking about them in ChatGPT, then edited and commented on by multiple people and agents.
OpenAI is also playing inside Microsoft’s house. It released ChatGPT in PowerPoint as a global beta on May 21, 2026, after earlier integrations with Excel and Google Sheets . On July 10 it introduced ChatGPT Work, an agent built with Codex technology that produces documents, spreadsheets, presentations, and web apps from connected workplace information. Its plugins reach Slack, Microsoft Teams, Google Drive, and SharePoint, among others, and a Compliance API gives enterprises visibility into its actions.
Meta is the wildcard, and its Muse agent can build mini-apps on the fly to help users finish specific tasks, a different bet from the document-and-grid model.
Why Microsoft is the target, and why it is not yet losing
Every one of these launches lands on ground Microsoft has long treated as its own: Excel for spreadsheets, Word and PowerPoint for documents and decks, Whiteboard and Loop for collaboration, Power BI for analytics, and Copilot as the AI layer across them. The relationships are complicated.
The challengers also leave gaps that favor the incumbent. Anthropic says Sheets is simple for now, and several of its pieces remain in beta. Its launch materials name Redshift, BigQuery, and ClickHouse as warehouses and Google Meet as the meeting platform, and the sources reviewed do not mention Microsoft’s data services or Teams. Microsoft 365 is already licensed, governed, and audited in most large enterprises, and Excel’s modeling depth is decades ahead of any new sheet. Microsoft’s real exposure is not a feature gap tomorrow. It is the possibility that the first screen of the workday, the one where ideas are shaped before they become Office files, moves to someone else.
The bottom line
The AI platform wars are no longer only about whose model is smartest. They are about whose workspace your people open first each morning. Microsoft still owns the installed base, the identity and compliance controls, and the depth of Office. But with OpenAI shipping Space, Anthropic shipping Whiteboards, Sheets, and Meetings, and Meta entering with Muse, it now has more than one challenger for that first screen.
For CIOs, the practical move is to treat this as a vendor-strategy and governance decision now, while the products are in beta and the defaults are still yours to set.