Noometry

Model comparison

Grok 4 vs Muse Spark 1.2

Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 48.1 on the Noometry Index.

Last verified . 18 shared benchmarks.

Grok 4 xAI

48.1

Rank #56 Confirmed

Muse Spark 1.2 Meta

50.3

Rank #48 Confirmed

Summary

  • They share 18 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 45.2.
  • 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 Index48.150.3
Released2025-07-092026-08-05
WeightsProprietaryProprietary
Context window—1.05M
Max output—131K
Input $ / M tokens—$1.25
Output $ / M tokens—$4.25
Results tracked4831

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Category by category

Coding Grok 4 leads

Grok 4: 50.3 (#46), Muse Spark 1.2: 49.2 (#51)

BenchmarkGrok 4Muse Spark 1.2
WeirdML45.7%60.3%
LMArena Coding14081495
DeepSWE—54.9%
Aider Polyglot79.6%—
LMArena WebDev—1533
FrontierSWE—12%
SciCode—56.4%

Agentic & Tool Use Grok 4 leads

Grok 4: 32.3 (#68), Muse Spark 1.2: 29.4 (#87)

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: 36.7 (#65), Muse Spark 1.2: 51.3 (#34)

BenchmarkGrok 4Muse Spark 1.2
SimpleBench60.5%74.5%
LMArena Hard Prompts14091486
Epoch Capabilities Index146.44154.87
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: 48.4 (#64), Muse Spark 1.2: 46.4 (#70)

BenchmarkGrok 4Muse Spark 1.2
LMArena Math14221471
OTIS Mock AIME 2024-202584%—
ProofBench—43%
Omni-MATH60.3%—
FrontierMath (Feb 2025 set)19.7%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge Too close to call

Grok 4: 53.8 (#55), Muse Spark 1.2: 54.1 (#53)

BenchmarkGrok 4Muse Spark 1.2
LMArena Expert14151480
GPQA Diamond87%—
SimpleQA Verified—60.3%
MMLU-Pro85.1%—
Confabulations12.4%—
GPQA (HELM)72.7%—

Multimodal Muse Spark 1.2 leads

Grok 4: 33.7 (#94), Muse Spark 1.2: 43.4 (#25)

BenchmarkGrok 4Muse Spark 1.2
LMArena Vision12101305
GeoBench45%—

Multilingual Muse Spark 1.2 leads

Grok 4: 51.8 (#103), Muse Spark 1.2: 57.1 (#11)

BenchmarkGrok 4Muse Spark 1.2
LMArena Non-English14031478
LMArena Chinese14271511
LMArena French14181513
LMArena Russian14101487
LMArena Spanish14201498
LMArena German1429—
LMArena Japanese1394—
LMArena Korean1377—

Instruction Following Grok 4 leads

Grok 4: 79.2 (#5), Muse Spark 1.2: 76.7 (#36)

BenchmarkGrok 4Muse Spark 1.2
LMArena Instruction Following13871461
IFEval94.9%—

Long Context Grok 4 leads

Grok 4: 63.1 (#4), Muse Spark 1.2: 45.2 (#48)

BenchmarkGrok 4Muse Spark 1.2
LMArena Longer Query14091475
Fiction.LiveBench94.4%—

Writing & Preference Muse Spark 1.2 leads

Grok 4: 58.5 (#116), Muse Spark 1.2: 72.3 (#14)

BenchmarkGrok 4Muse Spark 1.2
LMArena Text14111482
LMArena Creative Writing13971449
LMArena Multi-Turn14161494
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 50.3 to 48.1 on the Noometry Index.

Is Grok 4 or Muse Spark 1.2 better for coding?

Grok 4 scores higher on coding benchmarks: 50.3 versus 49.2 in the Noometry coding category.

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

18 benchmarks have published results for both models. Grok 4 has 48 scored results on Noometry and Muse Spark 1.2 has 31.

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