What is the difference between Grok 4.20 Multi-Agent Beta and Muse Spark 1.3 Contributor?

Grok 4.20 Multi-Agent Beta is developed by xAI while Muse Spark 1.3 Contributor is developed by Meta AI. Grok 4.20 Multi-Agent Beta has a 2.0M token context window vs Muse Spark 1.3 Contributor's 1.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Grok 4.20 Multi-Agent Beta or Muse Spark 1.3 Contributor?

It depends on your use case. Grok 4.20 Multi-Agent Beta and Muse Spark 1.3 Contributor 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 Grok 4.20 Multi-Agent Beta cost compared to Muse Spark 1.3 Contributor?

Grok 4.20 Multi-Agent Beta costs $2/M input tokens and Muse Spark 1.3 Contributor costs $0.1/M input tokens. Muse Spark 1.3 Contributor is $1.90/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 Grok 4.20 Multi-Agent Beta and Muse Spark 1.3 Contributor on Rival?

This page shows a side-by-side comparison of Grok 4.20 Multi-Agent Beta and Muse Spark 1.3 Contributor 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

Grok 4.20 Multi-Agent BetavsMuse Spark 1.3 Contributor

Muse Spark 1.3 Contributor is cheaper than Grok 4.20 Multi-Agent Beta at $0.1/M vs $2/M input tokens.

Grok 4.20 Multi-Agent Beta and Muse Spark 1.3 Contributor compared across 53 shared prompts
Spec	Grok 4.20 Multi-Agent Beta	Muse Spark 1.3 Contributor
Input price	$2/M tokens	$0.1/M tokens
Output price	$6/M tokens	$0.2/M tokens
Context window	2.0M tokens	1.0M tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Mar 2026	Sep 2026