Muse Spark models

Versions

Muse Spark versions
Version	Model id	Released	Context	Max output	Input / 1M	Output / 1M	Review call	Weights
Muse Spark 1.2	meta/muse-spark-1.2	2026-08-05	1M	943.7K	$1.25	$4.25	$0.043	Closed
Muse Spark 1.1	meta/muse-spark-1.1	2026-04-08	1M	943.7K	$1.25	$4.25	$0.043	Closed

Outside benchmarks by model
Model	Arena WebDev	Arena Agent	Epoch Capabilities Index
Muse Spark 1.2	1534xHigh · range 1520 to 1547	-0.064xHigh · range -0.072 to -0.056	155range 153 to 157
Muse Spark 1.1	1543range 1535 to 1550	-0.064range -0.071 to -0.058	154range 152 to 156

Source: LMArena CC BY 4.0, Oct 16, 2026 · Epoch AI CC BY 4.0, Oct 7, 2026