For my custom agentic coding setup, I use Claude Code derived prompts with Gemini models, primarily flash. It's night and day compared to Google's own agentic products, which are all really bad.

The models are all close enough on the benchmarks and I think people are attributing too much difference in the agentic space to the model itself. I strongly believe the difference is in all the other stuff, which is why Antropic is far ahead of the competition. They have done great work with Claude Code, Cowork, and their knowledge share through docs & blog, bar none on this last point imo.