How Trading Desks Use Claude Fable 5: What IMC's Evaluation Found IMC's Claude Fable 5 evaluation aced 4 trading-analysis dimensions. First model to break 90% on FinanceReasoning. Quant workflows and desk setup inside. June 18, 2026 • Kimmo Hakonen Claude Fable 5 trading desk IMC AI evaluation quant finance AI 2026 Claude Fable 5 FinanceReasoning benchmark