Noometry

Model comparison

Grok 4 vs Muse Spark 1.3

Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 48.1 on the Noometry Index.

Last verified . 21 shared benchmarks.

Grok 4 xAI

48.1

Rank #56 Confirmed

Muse Spark 1.3 Meta

54.8

Rank #27 Confirmed

Summary

  • They share 21 benchmarks with published results for both. Grok 4 scores higher in 3 categories and Muse Spark 1.3 in 7 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in math, where Muse Spark 1.3 leads 73.1 to 48.4.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 84% for Grok 4 and 99.2% for Muse Spark 1.3.

Side by side

Grok 4Muse Spark 1.3
ProviderxAIMeta
Noometry Index48.154.8
Released2025-07-092026-09-02
WeightsProprietaryProprietary
Context window—1.05M
Max output—131K
Input $ / M tokens—$1.25
Output $ / M tokens—$4.25
Results tracked4837

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Category by category

Coding Muse Spark 1.3 leads

Grok 4: 50.3 (#46), Muse Spark 1.3: 56.6 (#21)

BenchmarkGrok 4Muse Spark 1.3
LMArena Coding14081514
Aider Polyglot79.6%—
CursorBench—41.6%
LMArena WebDev—1657
SciCode—59.7%
WeirdML45.7%—

Agentic & Tool Use Muse Spark 1.3 leads

Grok 4: 32.3 (#68), Muse Spark 1.3: 38.6 (#30)

BenchmarkGrok 4Muse Spark 1.3
Terminal-Bench27.2%—
APEX-Agents—57.8%
Berkeley Function Calling Leaderboard63%—
GDPval21.1%—
Cybench43%—
DeepResearch Bench47.3%—
BALROG43.6%—
GDP.pdf—27.6%
LMArena Search1142—
METR Time Horizons66.6%—

Reasoning Muse Spark 1.3 leads

Grok 4: 36.7 (#65), Muse Spark 1.3: 54.0 (#27)

BenchmarkGrok 4Muse Spark 1.3
Chess Puzzles28%38%
LMArena Hard Prompts14091503
Epoch Capabilities Index146.44156.75
ARC-AGI-216%—
SimpleBench60.5%—
Kagi LLM Benchmark73.6%—
NYT Connections (extended)—85.1%
ARC-AGI-166.7%—
CritPt—26%
Mystery Game Puzzles—25%
DTBench—96.5%
LMCA—53.9%
Bench to the Future 3—0.14
ForecastBench60.9—

Math Muse Spark 1.3 leads

Grok 4: 48.4 (#64), Muse Spark 1.3: 73.1 (#21)

BenchmarkGrok 4Muse Spark 1.3
OTIS Mock AIME 2024-202584%99.2%
LMArena Math14221494
FrontierMath (Tiers 1-3)—74.4%
FrontierMath Tier 4—46.3%
ProofBench—58%
Omni-MATH60.3%—
FrontierMath (Feb 2025 set)19.7%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge Grok 4 leads

Grok 4: 53.8 (#55), Muse Spark 1.3: 42.6 (#95)

BenchmarkGrok 4Muse Spark 1.3
LMArena Expert14151516
GPQA Diamond87%—
MMLU-Pro85.1%—
Confabulations12.4%—
GPQA (HELM)72.7%—

Multimodal Muse Spark 1.3 leads

Grok 4: 33.7 (#94), Muse Spark 1.3: 43.7 (#22)

BenchmarkGrok 4Muse Spark 1.3
LMArena Vision12101309
GeoBench45%—
LMArena Document—1471

Multilingual Muse Spark 1.3 leads

Grok 4: 51.8 (#103), Muse Spark 1.3: 57.4 (#8)

BenchmarkGrok 4Muse Spark 1.3
LMArena Non-English14031481
LMArena Chinese14271529
LMArena French14181524
LMArena German14291515
LMArena Japanese13941474
LMArena Korean13771501
LMArena Russian14101490
LMArena Spanish14201490

Instruction Following Grok 4 leads

Grok 4: 79.2 (#5), Muse Spark 1.3: 77.5 (#22)

BenchmarkGrok 4Muse Spark 1.3
LMArena Instruction Following13871477
IFEval94.9%—

Long Context Grok 4 leads

Grok 4: 63.1 (#4), Muse Spark 1.3: 45.6 (#32)

BenchmarkGrok 4Muse Spark 1.3
LMArena Longer Query14091488
Fiction.LiveBench94.4%—

Writing & Preference Muse Spark 1.3 leads

Grok 4: 58.5 (#116), Muse Spark 1.3: 73.6 (#9)

BenchmarkGrok 4Muse Spark 1.3
LMArena Text14111490
LMArena Creative Writing13971455
LMArena Multi-Turn14161482
Short-Story Creative Writing76.9%—
EQ-Bench Creative Writing—1906
WildBench79.7%—

Frequently asked questions

Is Grok 4 better than Muse Spark 1.3?

Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 48.1 on the Noometry Index.

Is Grok 4 or Muse Spark 1.3 better for coding?

Muse Spark 1.3 scores higher on coding benchmarks: 56.6 versus 50.3 in the Noometry coding category.

How many benchmarks do Grok 4 and Muse Spark 1.3 share?

21 benchmarks have published results for both models. Grok 4 has 48 scored results on Noometry and Muse Spark 1.3 has 37.

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