Explore Lessons AI Updates Blog About

Log in For Teams Start for Free

Learn AI by doing.

Start for Free For Teams About FAQ Updates Blog

Sign Up Sign In Support

2026 Moonswell Marketing LLC·Terms·Privacy··

GPT-5.5 Models in Microsoft 365 Copilot Chat | Microsoft Copilot | Chasing Next

Microsoft Copilotmodel

May 19, 2026·Source

GPT-5.5 Models in Microsoft 365 Copilot Chat

GPT-5.5 Instant and GPT-5.5 Thinking are now selectable models inside Copilot Chat.

Details

GPT-5.5 Instant handles everyday work with faster, more concise responses and better image and STEM analysis
GPT-5.5 Thinking handles complex problems with deeper multi-step reasoning and structured analysis
You pick the model directly in Copilot Chat, choosing speed or reasoning depth per task

Best for

Picking the right reasoning depth per task inside Copilot Chat

When to use it

You want Thinking for complex analysis or Instant for quick everyday work

Who benefits

Microsoft 365 Copilot users who already prefer GPT-5.5 over default model

More from Microsoft Copilot

Outlook Integrations for Copilot Chat

SharePoint Admin Agent

Contextual Nudges in Edge for Page Summaries

Staying informed is great. Staying ahead is better.

Pick a topic and leave with something you created.

Start for Free Bring to Your Team

Get new module drops and weekly AI strategy.