Noometry

Model comparison

Grok 4 vs Muse Spark 1.2

Muse Spark 1.2 is the stronger model overall, scoring 49.8 to 47.8 on the Noometry Index.

Last verified . 15 shared benchmarks.

Grok 4 xAI

47.8

Rank #49 Confirmed

Muse Spark 1.2 Meta

49.8

Rank #44 Confirmed

Summary

  • They share 15 benchmarks with published results for both. Grok 4 scores higher in 5 categories and Muse Spark 1.2 in 5 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 leads 63.1 to 45.4.
  • The biggest single-benchmark swing is WeirdML: 45.7% for Grok 4 and 60.3% for Muse Spark 1.2.

Side by side

Grok 4Muse Spark 1.2
ProviderxAIMeta
Noometry Index47.849.8
Released2025-07-092026-08-05
WeightsProprietaryProprietary
Context window—1.05M
Max output—131K
Input $ / M tokens—$1.25
Output $ / M tokens—$4.25
Results tracked4828

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Grok 4 leads

Grok 4: 49.9 (#44), Muse Spark 1.2: 48.6 (#49)

BenchmarkGrok 4Muse Spark 1.2
WeirdML45.7%60.3%
LMArena Coding14081497
DeepSWE—54.9%
Aider Polyglot79.6%—
LMArena WebDev—1532
FrontierSWE—12%
SciCode—56.4%

Agentic & Tool Use Grok 4 leads

Grok 4: 32.1 (#62), Muse Spark 1.2: 29.5 (#77)

BenchmarkGrok 4Muse Spark 1.2
Terminal-Bench27.2%—
APEX-Agents—36.4%
Berkeley Function Calling Leaderboard63%—
GDPval21.1%—
Cybench43%—
DeepResearch Bench47.3%—
BALROG43.6%—
GDP.pdf—16%
LMArena Search1142—
METR Time Horizons66.6%—

Reasoning Muse Spark 1.2 leads

Grok 4: 36.9 (#59), Muse Spark 1.2: 50.4 (#32)

BenchmarkGrok 4Muse Spark 1.2
SimpleBench60.5%74.5%
LMArena Hard Prompts14091490
Epoch Capabilities Index146.46155.18
ARC-AGI-216%—
Kagi LLM Benchmark73.6%—
NYT Connections (extended)—79.2%
ARC-AGI-166.7%—
CritPt—17.7%
Chess Puzzles28%—
DTBench—94.7%
LMCA—48.4%
ForecastBench60.9—

Math Grok 4 leads

Grok 4: 46.5 (#58), Muse Spark 1.2: 43.8 (#68)

BenchmarkGrok 4Muse Spark 1.2
OTIS Mock AIME 2024-202584%—
ProofBench—43%
Omni-MATH60.3%—
LMArena Math1422—
FrontierMath (Feb 2025 set)19.7%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge Too close to call

Grok 4: 53.7 (#50), Muse Spark 1.2: 53.9 (#49)

BenchmarkGrok 4Muse Spark 1.2
LMArena Expert14171485
GPQA Diamond87%—
SimpleQA Verified—60.3%
MMLU-Pro85.1%—
Confabulations12.4%—
GPQA (HELM)72.7%—

Multimodal Muse Spark 1.2 leads

Grok 4: 33.1 (#89), Muse Spark 1.2: 42.6 (#24)

BenchmarkGrok 4Muse Spark 1.2
LMArena Vision12111304
GeoBench45%—

Multilingual Muse Spark 1.2 leads

Grok 4: 52.0 (#98), Muse Spark 1.2: 57.4 (#10)

BenchmarkGrok 4Muse Spark 1.2
LMArena Non-English14031479
LMArena Chinese14281519
LMArena Russian14091494
LMArena French1418—
LMArena German1429—
LMArena Japanese1396—
LMArena Korean1376—
LMArena Spanish1419—

Instruction Following Grok 4 leads

Grok 4: 79.4 (#4), Muse Spark 1.2: 77.1 (#30)

BenchmarkGrok 4Muse Spark 1.2
LMArena Instruction Following13871466
IFEval94.9%—

Long Context Grok 4 leads

Grok 4: 63.1 (#4), Muse Spark 1.2: 45.4 (#35)

BenchmarkGrok 4Muse Spark 1.2
LMArena Longer Query14091483
Fiction.LiveBench94.4%—

Writing & Preference Muse Spark 1.2 leads

Grok 4: 58.7 (#111), Muse Spark 1.2: 72.6 (#14)

BenchmarkGrok 4Muse Spark 1.2
LMArena Text14121486
LMArena Creative Writing13971444
LMArena Multi-Turn14161504
Short-Story Creative Writing76.9%—
EQ-Bench Creative Writing—1840
WildBench79.7%—

Frequently asked questions

Is Grok 4 better than Muse Spark 1.2?

Muse Spark 1.2 is the stronger model overall, scoring 49.8 to 47.8 on the Noometry Index.

Is Grok 4 or Muse Spark 1.2 better for coding?

Grok 4 scores higher on coding benchmarks: 49.9 versus 48.6 in the Noometry coding category.

How many benchmarks do Grok 4 and Muse Spark 1.2 share?

15 benchmarks have published results for both models. Grok 4 has 48 scored results on Noometry and Muse Spark 1.2 has 28.

Related comparisons

Go deeper