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

> **Platform:** [SPIDITS AI](https://spidits.com/) — Real-Time AI News & Market Intelligence  
> **Published:** 2026-08-18T00:00:00.000Z  
> **Category:** PRODUCT_LAUNCH  
> **Impact Score:** 130/100  
> **Primary Source:** [Together AI Blog](https://www.together.ai/blog/deepseek-v4-pro-0813-vs-gpt-5-6-sol-on-deepswe-cost-coding-and-routing)  
> **Canonical Citation:** [https://spidits.com/timeline/deepseek-v4-pro-0813-vs-gpt-5-6-sol-on-deepswe-cost-coding-and-routing](https://spidits.com/timeline/deepseek-v4-pro-0813-vs-gpt-5-6-sol-on-deepswe-cost-coding-and-routing)

## Executive Summary
We ran 904 DeepSWE rollouts on DeepSeek V4 Pro 0813 and GPT-5.6 Sol. Sol leads pass@1 by 10 points at 35x the cost; Pro wins pass@4, and a Pro-first cascade hits 83.0%.

## Why It Matters (Strategic Analysis)
Frontier models offer superior single-shot precision but impose prohibitive per-token API costs, whereas cheaper open-weights models achieve higher coverage via multi-attempt inference retries. Implementing programmatic cascade routing leverages near-free generation retries while reserving costly precision models for fallback validation, fundamentally altering enterprise inference architecture.

## Key Entities & Companies
- **OpenAI**

## Referenced Coverage & Sources
- **[Together AI Blog](https://www.together.ai/blog/deepseek-v4-pro-0813-vs-gpt-5-6-sol-on-deepswe-cost-coding-and-routing)**: Untitled — _We ran 904 DeepSWE rollouts on DeepSeek V4 Pro 0813 and GPT-5.6 Sol. Sol leads pass@1 by 10 points at 35x the cost; Pro wins pass@4, and a Pro-first cascade hits 83.0%._

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*Synthesized by SPIDITS AI Market Intelligence Desk. Track live AI news, model releases, and funding: [https://spidits.com](https://spidits.com)*