DeepSeek V4 Pro 0813 vs Claude Fable 5 on DeepSWE: Cost, Coding, and Routing
Together AI ran 904 DeepSWE rollouts: Claude Fable 5 leads pass@1 (69.7% vs 62.8%) but costs 90x more ($21.63 vs $0.24 per rollout). A Pro-first cascade solves 82.7% of tasks at $8.28 each, 62% cheaper than Fable alone.
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