Anthropic's Claude 5.5 lineup and Fable 5.1: which model to pick and what it costs

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Anthropic now offers four current Claude models: Fable 5.1, Opus 5.5, Sonnet 5.5 and Haiku 5.5, all sharing a 1M-token context window and up to 128K output tokens. Per-token prices differ enormously, with the most expensive model costing about 100 times more on input than the cheapest. Fable 5.1 targets the hardest reasoning and long autonomous agent tasks, while the author suggests Opus 5.5 as the default for most workloads. Sonnet 5.5 is positioned as a faster, cheaper option for high-volume work needing real intelligence, and Haiku 5.5 for classification, extraction and routing. The guide notes pricing can change and advises checking Anthropic's pricing page before budgeting large jobs.

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