Fable is $8/$40, with cache reads at $0.2 and cache writes at $10, so you simply calculate based on the info from the blog:

> about 320M tokens read from cache, 19M written to cache, 1M output

320 * $0.2 + 19 * $10 + 1 * $40 = $294

Vibecoders don't use api. This whole game is less than 20% of the max plan's weekly quota.