Muse Spark 1.2

Meta AI · Closed weights · Released Aug 5, 2026 · Price not listed

n/aOverall · not enough data

Score by job

Not enough data · 2 of 5 benchmarks

Benchmark	Result	Variant	z
DeepSWE	54.9%	muse-spark-1.2_xhigh	-0.15
LMArena Coding	1499 rating	muse-spark-1.2 (xHigh)	0.39

Not enough data · 1 of 4 benchmarks

Benchmark	Result	Variant	z
APEX-Agents	36.4%	muse-spark-1.2	-1.51

Not enough data · 1 of 4 benchmarks

Benchmark	Result	Variant	z
SimpleBench	74.5%	muse-spark-1.2	0.91

Not enough data · 1 of 5 benchmarks

Benchmark	Result	Variant	z
ProofBench	43.0%	muse-spark-1.2	-0.19

64 · rank 20 · 2 of 2 benchmarks

Benchmark	Result	Variant	z
LMArena Creative Writing	1448 rating	muse-spark-1.2 (xHigh)	-0.10
LMArena Instruction Following	1471 rating	muse-spark-1.2 (xHigh)	0.25

36 · rank 27 · 1 of 1 benchmarks

Benchmark	Result	Variant	z
LMArena WebDev	1534 rating	muse-spark-1.2 (xHigh)	-0.23