Muse Wonder vs 
Riverflow V2 Fast
Muse Wonder 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, Muse Wonder has the edge: newer, bigger context window, major provider backing.
| Spec | Muse Wonder | Riverflow V2 Fast |
|---|---|---|
| Input price | $4/M tokens | — |
| Output price | $20/M tokens | — |
| Context window | 1.0M tokens | 8K tokens |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Oct 2026 | Feb 2026 |
| At 10M a month | $40.00 | not listed |
Input tokens at list price. No caching, no batch discount.
Where to run it
Muse Wonder1 host
Riverflow V2 Fast1 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.
Common questions
What is the difference between Muse Wonder and Riverflow V2 Fast?
Muse Wonder is developed by Meta AI while Riverflow V2 Fast is developed by Sourceful. Muse Wonder 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, Muse Wonder or Riverflow V2 Fast?
It depends on your use case. Muse Wonder 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 Muse Wonder and Riverflow V2 Fast on Rival?
This page shows a side-by-side comparison of Muse Wonder 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
- Muse Wonder vs Gemini 4 ArgonLanded Oct 2026
- Riverflow V2 Fast vs GPT-4 TurboLanded Oct 2026
- Muse Wonder vs Step 5 PreviewLanded Oct 2026
- Riverflow V2 Fast vs Claude Haiku 5.5Landed Oct 2026
- Muse Wonder vs Ling 3.1 FlashLanded Oct 2026
- Riverflow V2 Fast vs Mistral Large 4Landed Oct 2026
- Muse Wonder vs GPT-6.1 SolLanded Sep 2026
- Riverflow V2 Fast vs Claude Sonnet 5.5Landed Sep 2026
Same lab, same size, long tail
- Muse Wonder vs Muse Glimmer 30BSame lab
- Muse Wonder vs Muse Spark 1.3Same lab
- Riverflow V2 Fast vs Ox AlphaSame size
- Riverflow V2 Fast vs GPT-6.1 SolSame size
- Riverflow V2 Fast vs Ring 2.6 1TNew provider
- Riverflow V2 Fast vs Seed 2.0 CodeSame size
- Riverflow V2 Fast vs Seed 2.0 LiteNew provider
- Riverflow V2 Fast vs Seed 2.1 TurboSame size
