Qwen3.8 27B vs 
Riverflow V2 Fast
Qwen3.8 27B has a larger context window than Riverflow V2 Fast (262K 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
| Spec | Qwen3.8 27B | Riverflow V2 Fast |
|---|---|---|
| Input price | $0.4/M tokens | — |
| Output price | $3/M tokens | — |
| Context window | 262K tokens | 8K tokens |
| Weights | Open | — |
| Free API (OpenRouter) | No | No |
| Released | Aug 2026 | Feb 2026 |
| At 10M a month | $4.00 | not listed |
Input tokens at list price. No caching, no batch discount.
Where to run it
Qwen3.8 27B19 hosts
- Near AIfp8$0.04 in$1.35 out262k100% up
- Wafer$0.04 in$2.30 out262k100% up
- DekaLLM$0.05 in$3.00 out262k99.7% up
- Darkbloomfp4$0.05 in$2.20 out262k99% up
- Ionstreamfp8$0.09 in$2.35 out262k99.8% up
- Rekafp8$0.14 in$1.40 out262k96.9% up
13 more hostsFewer hosts
- DeepInfrabf16$0.15 in$1.88 out262k95.6% up
- Mancerfp8$0.20 in$2.50 out262k98.8% up
- AkashMLfp8$0.23 in$1.98 out262k99.7% up
- Chutesfp8$0.24 in$2.20 out262k99.9% up
- Parasailfp8$0.24 in$2.20 out262k100% up
- CoreWeavefp8$0.40 in$3.00 out262k97.2% up
- Novita$0.42 in$3.00 out1M99.5% up
- Cloudflare Workers AI$0.45 in$3.20 out262k90.4% up
- Venicefp8$0.45 in$3.20 out262k99.3% up
- ModelRunfp4$0.70 in$4.70 out262k100% up
- Cerebrasfp16$0.99 in$1.49 out66k100% up
- PhalaDegraded on OpenRouter when checked, 10 Oct 2026$0.15 in$1.88 out1M98.8% up
- Alibaba CloudDegraded on OpenRouter when checked, 10 Oct 2026$0.42 in$2.55 out1M97.7% up
Riverflow V2 Fast1 host
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Qwen3.8 27B and Riverflow V2 Fast?
Qwen3.8 27B is developed by Qwen while Riverflow V2 Fast is developed by Sourceful. Qwen3.8 27B has a 262K 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, Qwen3.8 27B or Riverflow V2 Fast?
It depends on your use case. Qwen3.8 27B 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 Qwen3.8 27B and Riverflow V2 Fast on Rival?
This page shows a side-by-side comparison of Qwen3.8 27B 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
- Qwen3.8 27B vs Step 5 PreviewLanded Oct 2026
- Riverflow V2 Fast vs Claude Haiku 5.5Landed Oct 2026
- Qwen3.8 27B vs Ling 3.1 FlashLanded Oct 2026
- Riverflow V2 Fast vs Mistral Large 4Landed Oct 2026
- Qwen3.8 27B vs GPT-6.1 SolLanded Sep 2026
- Riverflow V2 Fast vs Claude Sonnet 5.5Landed Sep 2026
- Qwen3.8 27B vs Solar Mini 4Landed Sep 2026
- Riverflow V2 Fast vs Qwen3.8 Max PrimeLanded Sep 2026
Same lab, same size, long tail
- Qwen3.8 27B vs Qwen3.8 2.4T A95BVersion compare
- Qwen3.8 27B vs Qwen3.8 Max PrimeSame lab
- Riverflow V2 Fast vs Ox AlphaSame size
- Riverflow V2 Fast vs GPT-6.1 SolSame size
- Qwen3.8 27B vs Gemini 1.5 ProNew provider
- Qwen3.8 27B vs Gemini 2.0 Flash ThinkingNew provider
- Qwen3.8 27B vs Gemini 2.0 Pro ExperimentalNew provider
- Qwen3.8 27B vs Gemini 2.5 Flash Lite Preview 06-17New provider
