Noometry

Model comparison

Claude Opus 4.1 vs Grok 4

Grok 4 is the stronger model overall, scoring 47.8 to 40.8 on the Noometry Index.

Last verified . 34 shared benchmarks.

Claude Opus 4.1 Anthropic

40.8

Rank #136 Confirmed

Grok 4 xAI

47.8

Rank #49 Confirmed

Summary

  • They share 34 benchmarks with published results for both. Claude Opus 4.1 scores higher in 3 categories and Grok 4 in 7 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where Grok 4 leads 46.5 to 22.0.
  • The biggest single-benchmark swing is GDPval: 43.6% for Claude Opus 4.1 and 21.1% for Grok 4.

Side by side

Claude Opus 4.1Grok 4
ProviderAnthropicxAI
Noometry Index40.847.8
Released2025-08-052025-07-09
WeightsProprietaryProprietary
Context window200K—
Max output32K—
Input $ / M tokens$15—
Output $ / M tokens$75—
Results tracked4848

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Category by category

Coding Grok 4 leads

Claude Opus 4.1: 44.3 (#69), Grok 4: 49.9 (#44)

BenchmarkClaude Opus 4.1Grok 4
WeirdML45.9%45.7%
LMArena Coding14791408
SWE-bench Verified73.3%—
Aider Polyglot—79.6%
LMArena WebDev1390—
ALE-Bench674.77—
AlgoTune1.34—

Agentic & Tool Use Claude Opus 4.1 leads

Claude Opus 4.1: 34.8 (#38), Grok 4: 32.1 (#62)

BenchmarkClaude Opus 4.1Grok 4
Terminal-Bench38%27.2%
GDPval43.6%21.1%
Cybench42%43%
DeepResearch Bench48.3%47.3%
LMArena Search11481142
METR Time Horizons66.8%66.6%
Berkeley Function Calling Leaderboard—63%
BALROG—43.6%

Reasoning Grok 4 leads

Claude Opus 4.1: 31.6 (#70), Grok 4: 36.9 (#59)

BenchmarkClaude Opus 4.1Grok 4
SimpleBench60%60.5%
Chess Puzzles7%28%
LMArena Hard Prompts14431409
Epoch Capabilities Index144.11146.46
ForecastBench6260.9
ARC-AGI-2—16%
Kagi LLM Benchmark—73.6%
ARC-AGI-1—66.7%
EnigmaEval7.2%—
EBR-Bench7.9%—
Mystery Game Puzzles21%—
DTBench80%—
LMCA37.1%—

Math Grok 4 leads

Claude Opus 4.1: 22.0 (#267), Grok 4: 46.5 (#58)

BenchmarkClaude Opus 4.1Grok 4
OTIS Mock AIME 2024-202568.9%84%
LMArena Math14301422
FrontierMath (Feb 2025 set)7.2%19.7%
FrontierMath Tier 4 (v1)4.2%2.1%
FrontierMath (Tiers 1-3)12.6%—
FrontierMath Tier 42.4%—
Omni-MATH—60.3%

Knowledge Grok 4 leads

Claude Opus 4.1: 41.9 (#93), Grok 4: 53.7 (#50)

BenchmarkClaude Opus 4.1Grok 4
GPQA Diamond77.3%87%
Confabulations17.1%12.4%
LMArena Expert14391417
Humanity's Last Exam11.5%—
MMLU-Pro—85.1%
Vectara Hallucination Rate11.8%—
GPQA (HELM)—72.7%

Multimodal Grok 4 leads

Claude Opus 4.1: 26.2 (#114), Grok 4: 33.1 (#89)

BenchmarkClaude Opus 4.1Grok 4
LMArena Vision—1211
GeoBench—45%
VPCT35%—

Multilingual Too close to call

Claude Opus 4.1: 52.1 (#90), Grok 4: 52.0 (#98)

BenchmarkClaude Opus 4.1Grok 4
LMArena Non-English14051403
LMArena Chinese14271428
LMArena French14321418
LMArena German14121429
LMArena Japanese13781396
LMArena Korean13811376
LMArena Russian14211409
LMArena Spanish14481419

Instruction Following Grok 4 leads

Claude Opus 4.1: 75.8 (#53), Grok 4: 79.4 (#4)

BenchmarkClaude Opus 4.1Grok 4
LMArena Instruction Following14361387
IFEval—94.9%

Long Context Grok 4 leads

Claude Opus 4.1: 44.5 (#60), Grok 4: 63.1 (#4)

BenchmarkClaude Opus 4.1Grok 4
LMArena Longer Query14551409
Fiction.LiveBench—94.4%

Writing & Preference Claude Opus 4.1 leads

Claude Opus 4.1: 62.6 (#70), Grok 4: 58.7 (#111)

BenchmarkClaude Opus 4.1Grok 4
LMArena Text14191412
LMArena Creative Writing14121397
Short-Story Creative Writing84.7%76.9%
LMArena Multi-Turn14441416
WildBench—79.7%

Frequently asked questions

Is Claude Opus 4.1 better than Grok 4?

Grok 4 is the stronger model overall, scoring 47.8 to 40.8 on the Noometry Index.

Is Claude Opus 4.1 or Grok 4 better for coding?

Grok 4 scores higher on coding benchmarks: 49.9 versus 44.3 in the Noometry coding category.

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

34 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Grok 4 has 48.

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