- It only tracks companies that have decided to use OpenRouter to help them switch models - which biases towards companies that like open weights. Anyone using OpenAI or Anthropic directly is much less likely to be represented.

- OpenRouter don't share the number of unique users represented in those numbers. I worry a lot about whales - are there a few giant users of OpenRouter who, if they change their preferred model, instantly affect the global leaderboards?

In this case I suspect the numbers are affected by the release of Claude Haiku 5.5 and GPT-6 Luna - both excellent inexpensive models, which may well take market share from some of the models that OpenRouter is serving. OpenAI and Anthropic have the most mature client support so I expect it's more likely people will switch away from OpenRouter if those are their daily drivers.

Happy to be convinced otherwise if anyone has useful data that I've missed.

Or more people are using harnesses that do what openrouter does so they don't need it anymore?

Or they are using other GPU providers directly to run their open source models?

I don't think this data is conclusive. It's a very unique subset who are using openrouter.

We are able to purchase similar level intelligence at much lower prices now. Even sonnet 5.5 is becoming an overkill for most of our agentic workload.

ps. our total token usage last 30 days is around 30B

Again, two data points do not make a full story but if you're an AI bull this is not what you want to see.

I can’t make the same assumption here because I can only see what’s on the left, but that in no way implies that the opposite assumption is any more warranted.