Updated as of November 11, 2026
“What the hell are Fable, Opus, Sonnet, and Haiku? These are the 4 model classes of @claudeai In order from MOST to LEAST intelligent, it’s: Fable Opus Sonnet Haiku When should you use each? Well, the more intelligent the model, the more complex of tasks it can handle, and the longer it can go without making a mistake. It also will tend to use more tokens, so if you want to save that, you can”
The copy explains model choices through task complexity and the need to avoid mistakes. It is an indirect writing example, but its decision guidance gives curious viewers a reason to consider the Sign up prompt.
Copy this: Help buyers choose an option by explaining the work each option suits.