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Fable 5.1: Better Benchmarks, 25% Lower Cost
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Fable 5.1: Better Benchmarks, 25% Lower Cost

Fable 5.1 beats Fable 5, Opus 5, and GPT 5.6 Soul across the board while costing an estimated 25% less — up to 45% less on long-running agentic work. Here's everything that actually changed.