they don't have 64% marketshare. they have 64% of openrouter usage, because people mostly don't use openrouter to access claude or chatGPT.
Obviously that won't account for direct use of anthropic/OpenAI apis. Still impressive that DeepSeek-use doubled in that data though
regardless the more likely answer is that people aren't using gateways for the big lab models
(I’m referring to Europe mostly, I can believe it’s nowhere near 64% in the US)
There is no reason to pay API prices for Anthropic and OpenAI if they don't cut them down 100x at least.