Fable is $10/50. Opus 4.1 launched at $15/75

I was reading YC's Request for startups and came to this section by Raphael Schaad(Visiting Partner YC) - [https://www.ycombinator.com/rfs#ai-powered-consumer-products-for-1-billion-people]. He mentions token (intelligence) costs falling 10x a year.

I could find no good sources to quantify that and decided to build tokenindex to visualise dropping intelligence costs.

It's completely OSS and uses a one-of-it's kind dataset, i spliced from different sources like wayback machine, litellm commits & Epoch AI benchmarks.