What is the difference between GPT-4.1 Mini and Riverflow V2 Fast?

GPT-4.1 Mini is developed by OpenAI while Riverflow V2 Fast is developed by Sourceful. GPT-4.1 Mini 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, GPT-4.1 Mini or Riverflow V2 Fast?

It depends on your use case. GPT-4.1 Mini 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 GPT-4.1 Mini and Riverflow V2 Fast on Rival?

This page shows a side-by-side comparison of GPT-4.1 Mini 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.

Updated Feb 2026

GPT-4.1 MinivsRiverflow V2 Fast

GPT-4.1 Mini has a larger context window than Riverflow V2 Fast (1.0M tokens vs 8K tokens).

GPT-4.1 Mini and Riverflow V2 Fast compared across 2 shared prompts
Spec	GPT-4.1 Mini	Riverflow V2 Fast
Input price	$0.4/M tokens	—
Output price	$1.6/M tokens	—
Context window	1.0M tokens	8K tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Apr 2025	Feb 2026