Fable 5 outperforms GPT-5.6 Sol on NP-hard fiber-network optimization
July 18, 2026
Fable 5 demonstrated superior consistency and solution quality on a proprietary NP-hard fiber-network design problem compared to GPT-5.6 Sol. Testing indicates that native /goal modes function as search path modifiers rather than general intelligence multipliers, occasionally resulting in suboptimal convergence.
HOW THIS AFFECTS YOU
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builderEvaluate model performance on specific operations research benchmarks rather than relying on general reasoning capabilities.
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researcherNote the non-linear impact of /goal modes on search trajectories in complex optimization tasks.