No, it's more that Gemini models are simply not very good for coding compared to the top two. Even with Antigravity I use Claude models.
Is there a fine-tuned Gemma coding model? I'd assume that would perform quite well.
At least, that's my heuristic that tends to work for my workflow. I use a combination of Gemini-CLI, Claude Code, and Github Copilot, but across those, the underlying model choice works best according to which part of the applicaiton I am messing with