Noometry

Model comparison

Claude Opus 4 vs Grok 4.1

Claude Opus 4 is the stronger model overall, scoring 43.1 to 41.5 on the Noometry Index.

Last verified . 18 shared benchmarks.

Claude Opus 4 Anthropic

43.1

Rank #100 Confirmed

Grok 4.1 xAI

41.5

Rank #134 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Claude Opus 4 scores higher in 5 categories and Grok 4.1 in 4 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in coding, where Claude Opus 4 leads 47.2 to 33.7.

Side by side

Claude Opus 4Grok 4.1
ProviderAnthropicxAI
Noometry Index43.141.5
Released2025-05-222025-11-17
WeightsProprietaryProprietary
Context window200K—
Max output32K—
Input $ / M tokens$15—
Output $ / M tokens$75—
Results tracked5619

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Category by category

Coding Claude Opus 4 leads

Claude Opus 4: 47.2 (#62), Grok 4.1: 33.7 (#253)

BenchmarkClaude Opus 4Grok 4.1
LMArena Coding14421445
SWE-bench Verified70.7%—
SWE-bench Verified (bash only)67.6%—
Aider Polyglot72%—
LMArena WebDev—1214
GSO6.9%—
WeirdML43.7%—
AlgoTune1.33—

Agentic & Tool Use Too close to call

Claude Opus 4: 34.8 (#42), Grok 4.1: 34.1 (#49)

BenchmarkClaude Opus 4Grok 4.1
Cybench38%39%
DeepResearch Bench46.8%—
LMArena Search1127—
METR Time Horizons63.9%—

Reasoning Grok 4.1 leads

Claude Opus 4: 27.3 (#121), Grok 4.1: 29.5 (#91)

BenchmarkClaude Opus 4Grok 4.1
LMArena Hard Prompts13991435
ARC-AGI-28.6%—
SimpleBench58.8%—
Kagi LLM Benchmark74.3%—
ARC-AGI-135.7%—
CritPt0.3%—
EnigmaEval5.6%—
DTBench81.6%—
LMCA37.4%—
Epoch Capabilities Index142.67—
ForecastBench61.1—

Math Claude Opus 4 leads

Claude Opus 4: 42.0 (#86), Grok 4.1: 38.9 (#120)

BenchmarkClaude Opus 4Grok 4.1
LMArena Math13901422
OTIS Mock AIME 2024-202564.4%—
Omni-MATH61.6%—
MATH Level 585%—
FrontierMath (Feb 2025 set)4.5%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Claude Opus 4 leads

Claude Opus 4: 44.0 (#88), Grok 4.1: 39.5 (#133)

BenchmarkClaude Opus 4Grok 4.1
LMArena Expert13861417
GPQA Diamond76.3%—
Humanity's Last Exam10.7%—
MMLU-Pro87.5%—
Confabulations15.9%—
Vectara Hallucination Rate12%—
GPQA (HELM)70.8%—

Multimodal Not comparable

Claude Opus 4: 31.5 (#106), Grok 4.1: —

BenchmarkClaude Opus 4Grok 4.1
LMArena Vision1192—
GeoBench49%—
VPCT38%—

Multilingual Grok 4.1 leads

Claude Opus 4: 48.8 (#138), Grok 4.1: 53.4 (#68)

BenchmarkClaude Opus 4Grok 4.1
LMArena Non-English13621425
LMArena Chinese13861465
LMArena French13721448
LMArena German13911446
LMArena Japanese13311397
LMArena Korean13211407
LMArena Russian13921434
LMArena Spanish13891438

Instruction Following Claude Opus 4 leads

Claude Opus 4: 77.1 (#28), Grok 4.1: 73.8 (#111)

BenchmarkClaude Opus 4Grok 4.1
LMArena Instruction Following14061400
IFEval91.8%—

Long Context Grok 4.1 leads

Claude Opus 4: 39.6 (#172), Grok 4.1: 43.2 (#100)

BenchmarkClaude Opus 4Grok 4.1
LMArena Longer Query14221416
Fiction.LiveBench61.1%—

Writing & Preference Grok 4.1 leads

Claude Opus 4: 61.2 (#89), Grok 4.1: 62.4 (#75)

BenchmarkClaude Opus 4Grok 4.1
LMArena Text13771437
LMArena Creative Writing13871411
LMArena Multi-Turn13961437
Short-Story Creative Writing83.6%—
EQ-Bench Creative Writing1580—
WildBench85.2%—

Frequently asked questions

Is Claude Opus 4 better than Grok 4.1?

Claude Opus 4 is the stronger model overall, scoring 43.1 to 41.5 on the Noometry Index.

Is Claude Opus 4 or Grok 4.1 better for coding?

Claude Opus 4 scores higher on coding benchmarks: 47.2 versus 33.7 in the Noometry coding category.

How many benchmarks do Claude Opus 4 and Grok 4.1 share?

18 benchmarks have published results for both models. Claude Opus 4 has 56 scored results on Noometry and Grok 4.1 has 19.

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