I asked GPT-5, GPT-5 Pro, GPT-5 Thinking, and o3 to analyze my code repository - and found surprising differences in detail, reasoning, and actionable insights that could change how you work.

Agent mode, MCP, next edit suggestions, and more -- GitHub Copilot is getting smarter in both VS and VS Code. Here's a side-by-side look at what developers get in each IDE.