One AI model charged about 1,863 times as much as another to read the same text. Same price list, same day.
The price list was OpenRouter's, a site that sells access to many AI models, on 17 October. GPT-5.5 Pro charged about 1,863 times as much per input token as DeepSeek V4.1 Flash. A token is a small chunk of text, and input tokens are the ones a model reads.
But the average price has been falling. Ramp's index of the price businesses pay per million tokens fell 41% from its March peak, to $0.68.
A 41% drop is small next to a 1,863-times gap. The average tells you little about your own bill. Which model your AI uses to read tells you much more.


Business token usage: the full research
Business AI usage is splitting in two. Token volume is moving to cheaper models. Spending is not moving with it.















