Fable 5 vs. GPT-5.6 Sol on an NP-Hard Problem: Does /goal help?

I gave Claude Fable 5 and GPT-5.6 Sol the same unpublished NP-hard optimization problem, with and without their native /goal mode. Fable 5 is a beast; /goal is not a game changer.
257 points by couAUIA 95 days ago charlesazam.com 125 comments
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