What is the difference between Muse Spark 1.1 and Solar Pro 3?

Muse Spark 1.1 is developed by Meta AI while Solar Pro 3 is developed by Upstage. Muse Spark 1.1 has a 1.0M token context window vs Solar Pro 3's 128K. You can compare their actual outputs across 39 challenges on Rival to see how they differ in practice.

Which is better, Muse Spark 1.1 or Solar Pro 3?

It depends on your use case. Muse Spark 1.1 and Solar Pro 3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 39 challenges so you can judge which fits your needs best.

How much does Muse Spark 1.1 cost compared to Solar Pro 3?

Muse Spark 1.1 costs $1.25/M input tokens and Solar Pro 3 costs $0/M input tokens. Solar Pro 3 is $1.25/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 Muse Spark 1.1 and Solar Pro 3 on Rival?

This page shows a side-by-side comparison of Muse Spark 1.1 and Solar Pro 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 Jul 2026

Muse Spark 1.1vsSolar Pro 3

Solar Pro 3 is cheaper than Muse Spark 1.1 at $0/M vs $1.25/M input tokens.

Muse Spark 1.1 and Solar Pro 3 compared across 39 shared prompts
Spec	Muse Spark 1.1	Solar Pro 3
Input price	$1.25/M tokens	Free
Output price	$4.25/M tokens	Free
Context window	1.0M tokens	128K tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Jul 2026	Jan 2026