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Which Claude Model Should You Use? A Guide to the Anthropic Lineup

Haiku, Sonnet, Opus, and now Fable — Anthropic ships four tiers, and picking the wrong one either burns money or fumbles the task. Here's a practical map of the lineup, what each model is for, and how to route work between them.

claude-modelsclaude-opusclaude-sonnet+4

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