Ling 3.1 Flash vs 
Riverflow V2 Fast
Ling 3.1 Flash 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
Not enough votes to call it. On the specs, Ling 3.1 Flash has the edge: bigger model tier, newer, bigger context window.
| Spec | Ling 3.1 Flash | Riverflow V2 Fast |
|---|---|---|
| Input price | Free | — |
| Output price | Free | — |
| Context window | 262K tokens | 8K tokens |
| Free API (OpenRouter) | Yes (1 provider) | No |
| Released | Oct 2026 | Feb 2026 |
| At 10M a month | $0 | not listed |
Input tokens at list price. No caching, no batch discount.
Where to run it
Ling 3.1 Flash1 host
Riverflow V2 Fast1 host
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Ling 3.1 Flash and Riverflow V2 Fast?
Ling 3.1 Flash is developed by inclusionAI while Riverflow V2 Fast is developed by Sourceful. Ling 3.1 Flash 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, Ling 3.1 Flash or Riverflow V2 Fast?
It depends on your use case. Ling 3.1 Flash 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 Ling 3.1 Flash and Riverflow V2 Fast on Rival?
This page shows a side-by-side comparison of Ling 3.1 Flash 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
- Ling 3.1 Flash vs Step 5 PreviewLanded Oct 2026
- Riverflow V2 Fast vs Claude Haiku 5.5Landed Oct 2026
- Ling 3.1 Flash vs Mistral Large 4Landed Oct 2026
- Riverflow V2 Fast vs GPT-6.1 SolLanded Sep 2026
- Ling 3.1 Flash vs Claude Sonnet 5.5Landed Sep 2026
- Riverflow V2 Fast vs Solar Mini 4Landed Sep 2026
- Ling 3.1 Flash vs Qwen3.8 Max PrimeLanded Sep 2026
- Riverflow V2 Fast vs GLM 5.3 PrimeLanded Sep 2026
Same lab, same size, long tail
- Ling 3.1 Flash vs Ling 3.0 FlashSame lab
- Ling 3.1 Flash vs Ling 3.0 Flash Fin (free)Same lab
- Riverflow V2 Fast vs Ox AlphaSame size
- Riverflow V2 Fast vs Claude Sonnet 5.5Same size
- Riverflow V2 Fast vs Qwen3.5 27BNew provider
- Riverflow V2 Fast vs Qwen3.5 35B A3BNew provider
- Riverflow V2 Fast vs Qwen3.5 397B A17BNew provider
- Riverflow V2 Fast vs Qwen3.5 9BNew provider
