ChatGPT 5.4 is a big spreadsheet fan — and comes with special Excel & Google Sheets tools

ChatGPT is now using its 5.4 Thinking model for deeper reasoning, and it's even better at handling "professional work." ...
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OpenAI Unveils GPT-5.4: Advanced Financial Analytics Tools Now Available

OpenAI's GPT-5.4 debuts with financial tools, FactSet integration, Excel support, and investment analysis features for ChatGPT Plus, Team, and Pro users.