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Microsoft 365 Copilot Blog
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Available today: GPT-5.4 Thinking in Microsoft 365 Copilot

NitinAgrawal's avatar
NitinAgrawal
Icon for Microsoft rankMicrosoft
Mar 06, 2026
Today, we’re bringing OpenAI’s GPT‑5.4 Thinking to Microsoft 365 Copilot and Microsoft Copilot Studio—available in addition to the recent GPT-5.3 Instant update. With GPT‑5.4 Thinking, Copilot can th...
Updated Mar 06, 2026
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Rav3n's avatar
Rav3n
Brass Contributor
Mar 07, 2026

It appears you’re repeating the same misstep OpenAI made, continually introducing additional models while the overall ecosystem grows increasingly cluttered. A far more sensible approach would be to rationalize the lineup, streamline the offerings, and clean up the structure rather than endlessly layering new versions on top of the old.