OpenAI has shipped ChatGPT as a native add-in for Microsoft Excel and Google Sheets, available globally on all plans and powered by GPT-4.5.
The integration lets users analyze data, update financial or operational models, audit formula outputs, and convert unstructured business context into actionable decisions without leaving the spreadsheet environment. This is not a chatbot bolted onto a sidebar. It operates directly on your data.
The full announcement is worth reading for how OpenAI positions the workflow: specifically how model updates and output auditing work inside a live sheet, and what the all-plans availability means for enterprise versus free-tier access.
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