Score vs. cost savings by router model AC-001 Qwen Base GPT-5.6 Luna · no reasoning Always 5.4 Mini Always 5.6 Sol Clay difficulty heuristic 3-way Heuristic Prompt 0% 10% 20% 30% 40% 50% 88% 90% 92% 94% 96% 98% 100% 90% floor 92.5% floor 95% floor Measured score retained vs. always GPT-5.6 Sol Cost saved vs. always GPT-5.6 Sol Multiple points of the same color are different operating points of the same router.