Together AI· Inference platformModel update

DeepSeek V4 Pro 0813 vs GPT-5.6 Sol on DeepSWE: Cost, Coding, and Routing

A new comparison of DeepSeek V4 Pro 0813 and GPT-5.6 Sol shows that a cascading strategy—using DeepSeek V4 Pro 0813 first and escalating to GPT-5.6 Sol when tests fail—solves 83.0% of DeepSWE tasks at $3.35 each, outperforming Sol alone (72.7%) at a lower cost. The two models differ in price (35x gap), reliability, and failure modes.

From the source

Run DeepSeek V4 Pro 0813 first, escalate to GPT-5.6 Sol when the tests fail. That cascade solves 83.0% of DeepSWE tasks at $3.35 each. Sol alone solves 72.7% at $8.37. Ten points better, 60% cheaper.

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Announced

18 Aug 2026 00:00 UTC