> The issue with Copilot is that it's not as smart as the "thinking" chat apps.

Upgrade to a paid plan and you can use many of the same “thinking” models.

Honestly, your entire question is best answered by signing up for a free trial of one of these tools and using it. Not the free tier, a trial or a paid plan.

Copy and pasting into another app is extremely inefficient. You really need to try a tool that integrates your model of choice into the editor.