The OpenRouter usage stats indicate the opposite: https://openrouter.ai/rankings?view=month
At least from my experience and friends of mine, we use OpenRouter for cases where we want to use smaller LLMs like Qwen, but when I've used ChatGPT and Claude, I use those APIs directly.
I think it's pretty disingenuous to call your SaaS little when it is projected to spend at least 5 million USD just on tokens and this is a low end estimate.
And I pay way less than $1 per input token, especially when caching is taken into account.
EDIT: they updated it in the last day or two, now it says 70T, so I’m a little below 0.1% now. But seriously, the point stands, 70T tokens a month just isn’t that much in the global scheme. The big labs are pushing quadrillions each.