Muse Spark 1.3 specs, prices, where it runs and its benchmark standing

Name: Muse Spark 1.3
Author: Meta

closed weights · #28 overall, podium score 4.3 · top 10 on 2 of 6 · released Sep 2, 2026

Rank	Board	Category	Score	Of
6	LiveBenchReasoning · as “muse-spark-1.3-xhigh”	Reasoning	81.6%	64
10	Text ArenaChat · as “Muse Spark 1.3 (Max)”	Chat	1,495	84
11	Vision ArenaVision · as “Muse Spark 1.3 (Max)”	Vision	1,290	85
12	Document ArenaVision · as “Muse Spark 1.3 (Max)”	Vision	1,474	40
16	WebDev ArenaCoding · as “Muse Spark 1.3 (Max)”	Coding	1,654	82
23	Epoch ECIReasoning · as “Muse Spark 1.3”	Reasoning	158.0	100

Versions and release history

4 versions in this line since Apr 8, 2026, from Pricing, OpenRouter and the boards.

Category ranks, more models and catalog changes

modalities now Text, Image, Video, Files to Text, was Text, Image, Audio, Video, Files to TextOct 5, 2026 5 weeks ago