Noometry

Model comparison

Claude 3 Opus vs Grok-3 mini

Grok-3 mini is the stronger model overall, scoring 41.2 to 29.5 on the Noometry Index.

Last verified . 23 shared benchmarks.

Claude 3 Opus Anthropic

29.5

Rank #310 Confirmed

Grok-3 mini xAI

41.2

Rank #141 Confirmed

Summary

  • They share 23 benchmarks with published results for both. Claude 3 Opus scores higher in 1 category and Grok-3 mini in 7 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where Grok-3 mini leads 42.1 to 14.8.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 4.7% for Claude 3 Opus and 77.8% for Grok-3 mini.

Side by side

Claude 3 OpusGrok-3 mini
ProviderAnthropicxAI
Noometry Index29.541.2
Released2024-02-292025-04-09
WeightsProprietaryProprietary
Context window——
Max output——
Input $ / M tokens——
Output $ / M tokens——
Results tracked4635

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Category by category

Coding Grok-3 mini leads

Claude 3 Opus: 32.9 (#267), Grok-3 mini: 40.8 (#131)

BenchmarkClaude 3 OpusGrok-3 mini
WeirdML19.2%42.6%
LMArena Coding12641379
Aider Polyglot—49.3%
BigCodeBench Instruct45.5%—
LiveBench Coding38.6%—
BigCodeBench Complete57.4%—
HumanEval+77.4%—
MBPP+73.3%—

Agentic & Tool Use Not comparable

Claude 3 Opus: 24.6 (#116), Grok-3 mini: —

BenchmarkClaude 3 OpusGrok-3 mini
Cybench10%—
METR Time Horizons29.5%—

Reasoning Claude 3 Opus leads

Claude 3 Opus: 14.6 (#324), Grok-3 mini: 13.6 (#334)

BenchmarkClaude 3 OpusGrok-3 mini
LMArena Hard Prompts12451375
Epoch Capabilities Index126.91140.35
ARC-AGI-2—0.4%
SimpleBench23.5%—
Kagi LLM Benchmark—61.3%
ARC-AGI-1—16.5%
Chess Puzzles5%—
EnigmaEval0.8%—
LiveBench Reasoning40.6%—
DTBench61.6%—
LiveBench Data Analysis57.9%—
LMCA17%—
ForecastBench58.4—
LiveBench49.2%—
WinoGrande88.5%—

Math Grok-3 mini leads

Claude 3 Opus: 14.8 (#299), Grok-3 mini: 42.1 (#85)

BenchmarkClaude 3 OpusGrok-3 mini
OTIS Mock AIME 2024-20254.7%77.8%
LMArena Math12731386
MATH Level 537.5%90.9%
Omni-MATH—31.8%
LiveBench Math43.6%—
FrontierMath (Feb 2025 set)—5.9%

Knowledge Grok-3 mini leads

Claude 3 Opus: 24.5 (#267), Grok-3 mini: 46.4 (#81)

BenchmarkClaude 3 OpusGrok-3 mini
GPQA Diamond47.2%76.3%
Confabulations22.7%10.8%
LMArena Expert12231395
SimpleQA Verified12.6%—
MMLU-Pro—79.9%
GPQA (HELM)—67.5%
MMLU84.6%—

Multimodal Not comparable

Claude 3 Opus: 27.1 (#116), Grok-3 mini: —

BenchmarkClaude 3 OpusGrok-3 mini
LMArena Vision1023—

Multilingual Grok-3 mini leads

Claude 3 Opus: 41.4 (#207), Grok-3 mini: 48.1 (#145)

BenchmarkClaude 3 OpusGrok-3 mini
LMArena Non-English12581352
LMArena Chinese12481387
LMArena French12751357
LMArena German12581349
LMArena Japanese12041342
LMArena Korean11871335
LMArena Russian12801353
LMArena Spanish12461381

Instruction Following Grok-3 mini leads

Claude 3 Opus: 64.1 (#228), Grok-3 mini: 78.5 (#9)

BenchmarkClaude 3 OpusGrok-3 mini
LMArena Instruction Following12481357
LiveBench Instruction Following63.9%—
IFEval—95.1%

Long Context Grok-3 mini leads

Claude 3 Opus: 38.2 (#202), Grok-3 mini: 41.0 (#147)

BenchmarkClaude 3 OpusGrok-3 mini
LMArena Longer Query12591372
Fiction.LiveBench—66.7%

Writing & Preference Grok-3 mini leads

Claude 3 Opus: 47.2 (#213), Grok-3 mini: 52.5 (#169)

BenchmarkClaude 3 OpusGrok-3 mini
LMArena Text12621370
LMArena Creative Writing12351342
LMArena Multi-Turn12751355
Short-Story Creative Writing—73.5%
WildBench—65.1%
LiveBench Language50.4%—

Frequently asked questions

Is Claude 3 Opus better than Grok-3 mini?

Grok-3 mini is the stronger model overall, scoring 41.2 to 29.5 on the Noometry Index.

Is Claude 3 Opus or Grok-3 mini better for coding?

Grok-3 mini scores higher on coding benchmarks: 40.8 versus 32.9 in the Noometry coding category.

How many benchmarks do Claude 3 Opus and Grok-3 mini share?

23 benchmarks have published results for both models. Claude 3 Opus has 46 scored results on Noometry and Grok-3 mini has 35.

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