xAI has released Grok for Excel, an official Microsoft 365 add-in that embeds its Grok 4.5 model directly inside spreadsheets, letting users analyze data, build formulas and generate charts through natural language without exporting their files. The company announced the add-in on July 20, 2026, framing it as a practical, in-workflow deployment of its latest model rather than another standalone chat interface.
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