GLM 4.5 Air vs 
Riverflow V2 Fast
GLM 4.5 Air has a larger context window than Riverflow V2 Fast (128K 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 | GLM 4.5 Air | Riverflow V2 Fast |
|---|---|---|
| Input price | $0.2/M tokens | — |
| Output price | $1.1/M tokens | — |
| Context window | 128K tokens | 8K tokens |
| Weights | Open | — |
| Free API (OpenRouter) | No | No |
| Released | Jul 2025 | Feb 2026 |
| At 10M a month | $2.00 | not listed |
Input tokens at list price. No caching, no batch discount.
Where to run it
Riverflow V2 Fast1 host
Per million tokens. Prices and uptime via OpenRouter, checked 5 Oct 2026.
Common questions
What is the difference between GLM 4.5 Air and Riverflow V2 Fast?
GLM 4.5 Air is developed by Zhipu AI while Riverflow V2 Fast is developed by Sourceful. GLM 4.5 Air has a 128K 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, GLM 4.5 Air or Riverflow V2 Fast?
It depends on your use case. GLM 4.5 Air 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 GLM 4.5 Air and Riverflow V2 Fast on Rival?
This page shows a side-by-side comparison of GLM 4.5 Air 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
- GLM 4.5 Air vs GPT-6.1 SolLanded Sep 2026
- Riverflow V2 Fast vs Claude Sonnet 5.5Landed Sep 2026
- GLM 4.5 Air vs Solar Mini 4Landed Sep 2026
- Riverflow V2 Fast vs Qwen3.8 Max PrimeLanded Sep 2026
- GLM 4.5 Air vs GLM 5.3 PrimeLanded Sep 2026
- Riverflow V2 Fast vs Qwen3.8 Omni FlashLanded Sep 2026
- GLM 4.5 Air vs Command A+Landed Sep 2026
- Riverflow V2 Fast vs Claude Opus 5.5Landed Sep 2026
Same lab, same size, long tail
- GLM 4.5 Air vs GLM 5.3Same lab
- GLM 4.5 Air vs GLM 5.3 FlashSame lab
- Riverflow V2 Fast vs Ox AlphaSame size
- Riverflow V2 Fast vs MiniMax M3Same size
- Riverflow V2 Fast vs Nemotron 3.5 LightningNew provider
- GLM 4.5 Air vs Nex-N2.5-Mini (free)Same size
- GLM 4.5 Air vs Nex-N2.5-Pro (free)Same size
- Riverflow V2 Fast vs North Mini CodeNew provider
