Claude Code Alternatives?

For anyone that has use Claude Code, what is a powerful enough alternative? I've been getting some amazing results with it, but the cost quickly adds up. I'd like to test something like the Gemini 2.5 Flash API which is significantly cheaper.

Does Aider or RooCode offer comparative performance?

I'm not looking for something that's simply cheaper. I want to know if it's possible to get the same level of quality at a cheaper price. I know Claude Code is tightly integrated with its own model which is part of the reason it performs so well.