🚀 GPT-4 vs. GPT-5 in M365 Copilot
August 29, 2025
Copilot
GTM Strategy & Storytelling
Enterprise GTM, Sales, Marketing Leadership
Customer Transformation Stories
Global SaaS & AI GTM
GTM Strategy & Storytelling
Enterprise GTM, Sales, Marketing Leadership
Customer Transformation Stories
Global SaaS & AI GTM
Just got back from a few days OOO and decided to put Copilot + GPT-5 to the test.
I ran the same prompt twice — once with regular M365 Copilot (GPT-4 Turbo) and once with the new GPT-5 option — asking it to summarize my unread items and help me prioritize replies.
The difference?
👉 GPT-4 gave me a decent summary, and asked if I wanted draft replies.
👉 GPT-5 not only gave a great summary, but flagged 6 critical emails, drafted suggested replies, and asked which ones I wanted to refine.
Bottom line: GPT-5 felt more context-aware, actionable, and smarter in helping me get back on top of things after being out.
I’ll definitely be using it more moving forward!
💬 Have you tried GPT-5 in M365 Copilot yet? Noticed any differences?