Choosing a Model and Effort in Claude: Which of Opus, Sonnet, Haiku and Fable for Which Job?
The first step to protect your Claude limit is adjusting effort, not the model: Anthropic recommends starting most work with Opus 5.5 and changing effort first when results fall short or the limit melts. The November 2026 model family (Fable 5.2, Opus 5.5, Sonnet 5.5, Haiku 5.5), the model picker and effort levels, how Fable counts on each plan, and a comparison method using Bookstore's return policy draft.
15 Nov 2026
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10 min
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5
