GLM-5.3 matches GPT-5.6 Sol on DeepSWE at half the cost

Together AI ran 904 DeepSWE rollouts: GLM-5.3 trails GPT-5.6 Sol by 3.7 points on pass@1 (69.0% vs 72.7%) but leads pass@4 (87.6% vs 85.8%) at $3.99 per rollout vs $8.37. A GLM-first cascade solves 85.9% of tasks at $6.61 each.