OpenAI launches ChatGPT for Excel powered by GPT-5.4, enabling users to build, update, and analyze spreadsheet models using plain language.

Built on open-source software, this European cloud office suite aims to keep your data out of Microsoft 365 and Google Workspace.

ChatGPT is now using its 5.4 Thinking model for deeper reasoning, and it's even better at handling "professional work." ...

For agents, the value is clearer still: structured JSON output, reusable commands and built-in skills that let models interact with Workspace data and actions without a custom integration layer.

OpenAI integrates Excel support and live financial data into ChatGPT, creating a powerful spreadsheet co-pilot for traders, analysts, and crypto investors.