AI / MLClaude Opus 5.5 vs Fable 5.1 vs Opus 5: Which One Should Your Team Actually Use?
Anthropic says Opus 5.5 performs at Fable 5.1 level for 60% lower prices. We checked every number against Anthropic's docs and the first independent tests: what a real task costs on each model, why the effort setting decides whether you get Fable-level results, and the API changes to fix before you switch.
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