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.
Gemma 4 31b is better for coding than Gemini in my limited testing on a small C project single source file project, less than 1000 lines. Setting temperature to 0 gives better results for me. It seems like Gemini ignores the system prompt more and the default reasoning output seems more incoherent.
Depends on the language. Gemini and Claude are far superior when it comes to C# for instance, compared to anything that OAI offers.