GLM-5.3 vs. Claude Fable 5 on DeepSWE: Cost, Coding, and Routing

We ran 904 DeepSWE rollouts on GLM-5.3 and Claude Fable 5. A tie on pass@1, but GLM-5.3 wins pass@4 and costs 5.4x less: \$3.99 per rollout vs. \$21.63.