What is the Difference between GPT-5 and Copilot

REAL-WORLD TESTS

🧪 How is GPT-5 in Copilot 365 different from ChatGPT?

Image source: Kiki Wu / The Rundown

The Rundown: To see how GPT-5 inside Microsoft’s Copilot ecosystem truly differs from standalone ChatGPT 5, we tested its reasoning capabilities across the Microsoft 365 product suite (Outlook, Teams, OneDrive, and more).

The use cases that stood out:

Taming the email pile-up (Outlook): “Summarize all emails from the past week into a single update, with bullet points on what I need to reply to today.”
Meeting you missed (Teams): “Summarize yesterday’s marketing meeting I couldn’t attend, highlight decisions made, and share action items for me.”
Find key insights in Excel files (OneDrive): “Find the Excel file in OneDrive with The Rundown's Forecast for 2025. Tell me what's changed since last year.”
Prep before a big call or workshop (Teams + Outlook): “I have to present a workshop on GPT-5 in Microsoft Copilot. Prep me based on all recent emails, proposals, meeting notes, and public information.”

In summary: GPT-5 in Copilot isn’t about a shiny new model or AGI, it’s about enabling reasoning across tools people use in work every day. In true Microsoft fashion, the focus is on real-world results, echoing what Satya Nadella told The Rundown: “we celebrate tech companies far too much versus the impact of technology.”

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