@askcatgpt: 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 use a lower model or turn down the “effort” (this keeps the level of judgement high while ‘forcing’ Claude to do less ‘thinking’ and fewer tool calls.) All 4 model classes can be used in Chat, Cowork, and Claude Code, AND they all have access to the same connectors and skills. Hbu? Which model do you use the most? What other differences have you noticed? Thanks to the team at claudeai for helping bring this video to life.

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Friday 28 August 2026 23:50:30 GMT