What is the difference between GPT-4.1 Nano and Muse Spark 1.3?

GPT-4.1 Nano is developed by OpenAI while Muse Spark 1.3 is developed by Meta AI. GPT-4.1 Nano has a 1.0M token context window vs Muse Spark 1.3's 1.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-4.1 Nano or Muse Spark 1.3?

It depends on your use case. GPT-4.1 Nano and Muse Spark 1.3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does GPT-4.1 Nano cost compared to Muse Spark 1.3?

GPT-4.1 Nano costs $0.1/M input tokens and Muse Spark 1.3 costs $1.25/M input tokens. GPT-4.1 Nano is $1.15/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GPT-4.1 Nano and Muse Spark 1.3 on Rival?

This page shows a side-by-side comparison of GPT-4.1 Nano and Muse Spark 1.3 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 Sep 2026

GPT-4.1 NanovsMuse Spark 1.3

GPT-4.1 Nano is cheaper than Muse Spark 1.3 at $0.1/M vs $1.25/M input tokens.

GPT-4.1 Nano and Muse Spark 1.3 compared across 53 shared prompts
Spec	GPT-4.1 Nano	Muse Spark 1.3
Input price	$0.1/M tokens	$1.25/M tokens
Output price	$0.4/M tokens	$4.25/M tokens
Context window	1.0M tokens	1.0M tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Apr 2025	Sep 2026