If your data is leaking to OpenRouter, how many companies would be OK with that? So I doubt OpenRouter are peeking inside the workloads that flow through their proxy. However, they do publish "Top Models by Task" ranking[1] so maybe you have a point.

[1] https://openrouter.ai/rankings#task-spend

The top models by task is self reported. It’s based on the referrer header or some custom one I forget at this moment.

If you don’t include that it just doesn’t count those tokens.