Midjourney v6.1 vs 
Riverflow V2.5 Fast
Riverflow V2.5 Fast is the newer model, released after Midjourney v6.1.
Hyperrealistic Portrait
One prompt, one photorealistic portrait. Skin, eyes, light.
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Which answer wins?
Price and specs
| Spec | Midjourney v6.1 | Riverflow V2.5 Fast |
|---|---|---|
| Input price | — | Free |
| Output price | — | Free |
| Context window | — | 8K tokens |
| Free API (OpenRouter) | — | No |
| Released | Jul 2024 | Jun 2026 |
| At 10M a month | not listed | $0 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Midjourney v6.1
No hosts listed on OpenRouter.
Riverflow V2.5 Fast1 host
Per million tokens. Prices and uptime via OpenRouter, checked 5 Oct 2026.
Common questions
What is the difference between Midjourney v6.1 and Riverflow V2.5 Fast?
Midjourney v6.1 is developed by Midjourney while Riverflow V2.5 Fast is developed by Sourceful. You can compare their actual outputs across 3 challenges on Rival to see how they differ in practice.
Which is better, Midjourney v6.1 or Riverflow V2.5 Fast?
It depends on your use case. Midjourney v6.1 and Riverflow V2.5 Fast each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 3 challenges so you can judge which fits your needs best.
How can I compare Midjourney v6.1 and Riverflow V2.5 Fast on Rival?
This page shows a side-by-side comparison of Midjourney v6.1 and Riverflow V2.5 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
- Midjourney v6.1 vs Recraft V4.1 FlashLanded Sep 2026
- Riverflow V2.5 Fast vs GPT Image 2.5 SunburstLanded Sep 2026
- Midjourney v6.1 vs GPT Image 2.5 FlareLanded Sep 2026
- Riverflow V2.5 Fast vs Nano Banana 2 LiteLanded Jun 2026
- Midjourney v6.1 vs Riverflow V2.5 ProLanded Jun 2026
- Riverflow V2.5 Fast vs Recraft V4.1Landed May 2026
- Midjourney v6.1 vs Recraft V4.1 ProLanded May 2026
- Riverflow V2.5 Fast vs GPT Image 2Landed Apr 2026
Same lab, same size, long tail
- Midjourney v6.1 vs GPT Image 2.5 SunburstSame size
- Midjourney v6.1 vs Recraft V4.1Same size
- Riverflow V2.5 Fast vs Riverflow V2.5 ProSame lab
- Riverflow V2.5 Fast vs Recraft V4.1 FlashSame size
- Midjourney v6.1 vs Grok Imagine ImageSame size
- Riverflow V2.5 Fast vs HiDream L1 (Fast)Same size
- Midjourney v6.1 vs Hunyuan Image 3Same size
- Midjourney v6.1 vs Ideogram v3 BalancedSame size
