Riverflow V2 Fast vs 
Ternary Bonsai 2 27B
Ternary Bonsai 2 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 | Riverflow V2 Fast | Ternary Bonsai 2 27B |
|---|---|---|
| Input price | — | $0.075/M tokens |
| Output price | — | $0.5/M tokens |
| Context window | 8K tokens | 262K tokens |
| Free API (OpenRouter) | No | No |
| Released | Feb 2026 | Sep 2026 |
| At 10M a month | not listed | $0.75 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Riverflow V2 Fast1 host
Ternary Bonsai 2 27B1 host
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Riverflow V2 Fast and Ternary Bonsai 2 27B?
Riverflow V2 Fast is developed by Sourceful while Ternary Bonsai 2 27B is developed by PrismML. Riverflow V2 Fast has a 8K token context window vs Ternary Bonsai 2 27B's 262K. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.
Which is better, Riverflow V2 Fast or Ternary Bonsai 2 27B?
It depends on your use case. Riverflow V2 Fast and Ternary Bonsai 2 27B 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 Riverflow V2 Fast and Ternary Bonsai 2 27B on Rival?
This page shows a side-by-side comparison of Riverflow V2 Fast and Ternary Bonsai 2 27B 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.
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