DeepSeek V4 Pro 0813 vs 
Riverflow V2 Fast
DeepSeek V4 Pro 0813 has a larger context window than Riverflow V2 Fast (1.0M tokens vs 8K tokens).
Written rounds
2 promptsBuy-side IC memo on a fictional SaaS company. Valuation, then the diligence questions.
Five-year LBO on a fictional HVAC business. Returns first, then the sensitivities.
Price and specs
Not enough votes to call it. On the specs, DeepSeek V4 Pro 0813 has the edge: bigger model tier, newer, bigger context window, major provider backing.
| Spec | DeepSeek V4 Pro 0813 | Riverflow V2 Fast |
|---|---|---|
| Input price | $0.66/M tokens | — |
| Output price | $1.98/M tokens | — |
| Context window | 1.0M tokens | 8K tokens |
| Weights | Open | — |
| Free API (OpenRouter) | No | No |
| Released | Aug 2026 | Feb 2026 |
| At 10M a month | $6.60 | not listed |
Input tokens at list price. No caching, no batch discount.
Where to run it
DeepSeek V4 Pro 081319 hosts
- Baidu Qianfanfp8$0.22 in$0.66 out1M100% up
- Wafer$0.36 in$5.00 out1M99.2% up
- Ionstream$0.37 in$2.93 out1M100% up
- Sail Researchfp4$0.40 in$3.00 out1M100% up
- Alibaba Cloud$0.58 in$1.74 out1M99.8% up
- DeepSeek$0.66 in$1.98 out1M99.9% up
13 more hostsFewer hosts
- StreamLake$0.66 in$1.98 out1M99.9% up
- Phala$0.96 in$2.88 out1M100% up
- Novitafp8$0.99 in$2.97 out1M100% up
- GMI Cloudfp8$1.06 in$3.17 out1M100% up
- DeepInfrafp8$1.30 in$2.60 out1M99.6% up
- CoreWeavefp8$1.31 in$3.96 out1M100% up
- AtlasCloudfp8$1.32 in$3.96 out1M100% up
- Cloudflare Workers AI$1.32 in$3.96 out1M100% up
- DigitalOcean$1.32 in$3.96 out1M100% up
- Parasailfp8$1.32 in$3.96 out1M100% up
- SiliconFlowfp8$1.32 in$3.96 out1M100% up
- Together$1.32 in$3.96 out1M99.9% up
- Venice$1.65 in$4.95 out1M100% up
Riverflow V2 Fast1 host
Per million tokens. Prices and uptime via OpenRouter, checked 11 Oct 2026.
Common questions
What is the difference between DeepSeek V4 Pro 0813 and Riverflow V2 Fast?
DeepSeek V4 Pro 0813 is developed by DeepSeek while Riverflow V2 Fast is developed by Sourceful. DeepSeek V4 Pro 0813 has a 1.0M token context window vs Riverflow V2 Fast's 8K. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.
Which is better, DeepSeek V4 Pro 0813 or Riverflow V2 Fast?
It depends on your use case. DeepSeek V4 Pro 0813 and Riverflow V2 Fast each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.
How can I compare DeepSeek V4 Pro 0813 and Riverflow V2 Fast on Rival?
This page shows a side-by-side comparison of DeepSeek V4 Pro 0813 and Riverflow V2 Fast across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.
More comparisons
Against the newest arrivals
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- Riverflow V2 Fast vs Mistral Large 4Landed Oct 2026
- DeepSeek V4 Pro 0813 vs GPT-6.1 SolLanded Sep 2026
- Riverflow V2 Fast vs Claude Sonnet 5.5Landed Sep 2026
- DeepSeek V4 Pro 0813 vs Solar Mini 4Landed Sep 2026
- Riverflow V2 Fast vs Qwen3.8 Max PrimeLanded Sep 2026
Same lab, same size, long tail
- DeepSeek V4 Pro 0813 vs DeepSeek V3.1Version compare
- DeepSeek V4 Pro 0813 vs DeepSeek V4 Flash Vision ExpSame lab
- Riverflow V2 Fast vs Ox AlphaSame size
- Riverflow V2 Fast vs GPT-6.1 SolSame size
- Riverflow V2 Fast vs Gemini 3.1 Flash LiteNew provider
- Riverflow V2 Fast vs Gemini 3.1 Flash Lite PreviewNew provider
- Riverflow V2 Fast vs Gemini 3.1 Pro PreviewNew provider
- Riverflow V2 Fast vs Gemini 3.5 FlashSame size
