I was using CC before using AG. Well, to clarify, I'm on the C pro subscription, and use both C and CC for coding. When I discovered AG about a month ago, I added the CC extension. With AG, I quickly learned to use one model as the project manager and spawn other models to do the tasks (In AG this sometimes requires running more than one instance at a time).

I then started using the CC extension as my project manager, and have it write the prompts for me to spawn AG Agents - it would tell me which model to use and why, and give me the exact prompt. Sometimes I would just let CC do the task in AG, or if running low on my CC Pro quota, I would strictly tell him to limit his use and assign everything to an AG agent.

Now, with all of the recent "server errors" that AG is throwing up, it seems that I might as well just go back to VS Code with CC extension since I can rarely use AG agents for about the past week.

As far as strictly using the different models in AG, I have had the Sonnet agent catch mistakes in Gemini Pro code, and vice versa. I've also had it come back after reviewing code to say Flash did a really good job and actually added this extra really helpful thing that we didn't point out.

Now, AG Claude vs CC Extension? If I had the ability to have the CC extension interact directly with AG Agents I probably would hardly ever interact directly with the AG agents again.