GPT-5.5 Instant and GPT-5.5 Thinking are now selectable models inside Copilot Chat.
Picking the right reasoning depth per task inside Copilot Chat
You want Thinking for complex analysis or Instant for quick everyday work
Microsoft 365 Copilot users who already prefer GPT-5.5 over default model
Pick a topic and leave with something you created.
Get new module drops and weekly AI strategy.