Noometry

Model comparison

Claude Opus 4 vs Grok 3

Claude Opus 4 is the stronger model overall, scoring 42.9 to 39.6 on the Noometry Index.

Last verified . 39 shared benchmarks.

Claude Opus 4 Anthropic

42.9

Rank #93 Confirmed

Grok 3 xAI

39.6

Rank #150 Confirmed

Summary

  • They share 39 benchmarks with published results for both. Claude Opus 4 scores higher in 7 categories and Grok 3 in 2 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 4 leads 27.4 to 13.8.
  • The biggest single-benchmark swing is ARC-AGI-1: 35.7% for Claude Opus 4 and 5.5% for Grok 3.

Side by side

Claude Opus 4Grok 3
ProviderAnthropicxAI
Noometry Index42.939.6
Released2025-05-222025-04-09
WeightsProprietaryProprietary
Context window200K—
Max output32K—
Input $ / M tokens$15—
Output $ / M tokens$75—
Results tracked5640

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Category by category

Coding Claude Opus 4 leads

Claude Opus 4: 47.8 (#55), Grok 3: 41.5 (#113)

BenchmarkClaude Opus 4Grok 3
Aider Polyglot72%53.3%
WeirdML43.7%37.2%
LMArena Coding14421432
SWE-bench Verified70.7%—
SWE-bench Verified (bash only)67.6%—
GSO6.9%—
AlgoTune1.33—

Agentic & Tool Use Claude Opus 4 leads

Claude Opus 4: 34.5 (#39), Grok 3: 30.2 (#69)

BenchmarkClaude Opus 4Grok 3
Cybench38%—
DeepResearch Bench46.8%—
BALROG—29.5%
LMArena Search1127—
METR Time Horizons63.9%—

Reasoning Claude Opus 4 leads

Claude Opus 4: 27.4 (#104), Grok 3: 13.8 (#322)

BenchmarkClaude Opus 4Grok 3
ARC-AGI-28.6%0%
SimpleBench58.8%36.1%
Kagi LLM Benchmark74.3%61.3%
ARC-AGI-135.7%5.5%
LMArena Hard Prompts13991433
Epoch Capabilities Index142.67138.34
CritPt0.3%—
EnigmaEval5.6%—
DTBench81.6%—
LMCA37.4%—
ForecastBench61.1—

Math Claude Opus 4 leads

Claude Opus 4: 40.2 (#80), Grok 3: 36.2 (#122)

BenchmarkClaude Opus 4Grok 3
OTIS Mock AIME 2024-202564.4%55.6%
Omni-MATH61.6%46.4%
LMArena Math13911390
MATH Level 585%88.7%
FrontierMath (Feb 2025 set)4.5%3.8%
FrontierMath Tier 4 (v1)4.2%0%

Knowledge Grok 3 leads

Claude Opus 4: 43.9 (#82), Grok 3: 46.0 (#76)

BenchmarkClaude Opus 4Grok 3
GPQA Diamond76.3%75.8%
MMLU-Pro87.5%78.8%
Confabulations15.9%14.2%
Vectara Hallucination Rate12%5.8%
GPQA (HELM)70.8%65%
LMArena Expert13841420
Humanity's Last Exam10.7%—

Multimodal Not comparable

Claude Opus 4: 30.9 (#101), Grok 3: —

BenchmarkClaude Opus 4Grok 3
LMArena Vision1192—
GeoBench49%—
VPCT38%—

Multilingual Grok 3 leads

Claude Opus 4: 49.0 (#133), Grok 3: 52.5 (#81)

BenchmarkClaude Opus 4Grok 3
LMArena Non-English13621411
LMArena Chinese13861448
LMArena French13701460
LMArena German13911431
LMArena Japanese13321389
LMArena Korean13181374
LMArena Russian13921416
LMArena Spanish13881417

Instruction Following Claude Opus 4 leads

Claude Opus 4: 77.3 (#26), Grok 3: 75.2 (#69)

BenchmarkClaude Opus 4Grok 3
IFEval91.8%88.4%
LMArena Instruction Following14061409

Long Context Too close to call

Claude Opus 4: 39.5 (#167), Grok 3: 38.7 (#187)

BenchmarkClaude Opus 4Grok 3
Fiction.LiveBench61.1%58.3%
LMArena Longer Query14221439

Writing & Preference Claude Opus 4 leads

Claude Opus 4: 61.4 (#85), Grok 3: 56.0 (#136)

BenchmarkClaude Opus 4Grok 3
LMArena Text13771426
LMArena Creative Writing13861414
Short-Story Creative Writing83.6%76.4%
EQ-Bench Creative Writing15801186
WildBench85.2%84.9%
LMArena Multi-Turn13961424

Frequently asked questions

Is Claude Opus 4 better than Grok 3?

Claude Opus 4 is the stronger model overall, scoring 42.9 to 39.6 on the Noometry Index.

Is Claude Opus 4 or Grok 3 better for coding?

Claude Opus 4 scores higher on coding benchmarks: 47.8 versus 41.5 in the Noometry coding category.

How many benchmarks do Claude Opus 4 and Grok 3 share?

39 benchmarks have published results for both models. Claude Opus 4 has 56 scored results on Noometry and Grok 3 has 40.

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