There have been a lot of anxious murmurings lately about the price of AI going way up. Developers are spending more money training and running AI systems as competition thickens and the electrical grid gets squeezed. Customers, meanwhile, are shelling out more in order to get access to the latest models. Earlier this week, Anthropic—moving towards what’s expected to be a historic IPO—released Fable 5, a dialed-down version of the secretive and supposedly extremely powerful Mythos.