The newest AI model from Anthropic, which gives users access to stronger, faster reasoning and coding capabilities, lands in a crypto market beset by security problems and could well exacerbate them. The company released Claude Fable 5 on Tuesday, the first public model in the Mythos class and, Anthropic says, its most powerful yet. So powerful, in fact, the company released two versions: one for widespread use and the other for more restricted distribution.