Noometry

Model comparison

GPT-5 Nano vs Grok-3 mini

Grok-3 mini is the stronger model overall, scoring 41.2 to 33.5 on the Noometry Index.

Last verified . 31 shared benchmarks.

GPT-5 Nano OpenAI

33.5

Rank #241 Confirmed

Grok-3 mini xAI

41.2

Rank #141 Confirmed

Summary

  • They share 31 benchmarks with published results for both. GPT-5 Nano scores higher in 1 category and Grok-3 mini in 7 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in writing & preference, where Grok-3 mini leads 52.5 to 39.1.
  • The biggest single-benchmark swing is Omni-MATH: 54.6% for GPT-5 Nano and 31.8% for Grok-3 mini.

Side by side

GPT-5 NanoGrok-3 mini
ProviderOpenAIxAI
Noometry Index33.541.2
Released2025-08-072025-04-09
WeightsProprietaryProprietary
Context window400K—
Max output128K—
Input $ / M tokens$0.05—
Output $ / M tokens$0.40—
Results tracked4935

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Category by category

Coding Grok-3 mini leads

GPT-5 Nano: 33.6 (#254), Grok-3 mini: 40.8 (#131)

BenchmarkGPT-5 NanoGrok-3 mini
WeirdML38.1%42.6%
LMArena Coding13511379
SWE-bench Verified (bash only)34.8%—
Aider Polyglot—49.3%
ALE-Bench718.67—

Agentic & Tool Use Not comparable

GPT-5 Nano: 25.8 (#106), Grok-3 mini: —

BenchmarkGPT-5 NanoGrok-3 mini
Terminal-Bench21.8%—
Berkeley Function Calling Leaderboard51.5%—

Reasoning GPT-5 Nano leads

GPT-5 Nano: 16.3 (#306), Grok-3 mini: 13.6 (#334)

BenchmarkGPT-5 NanoGrok-3 mini
ARC-AGI-22.6%0.4%
Kagi LLM Benchmark62.2%61.3%
ARC-AGI-120.7%16.5%
LMArena Hard Prompts13281375
Epoch Capabilities Index139.38140.35
Chess Puzzles27%—
Mystery Game Puzzles9%—
DTBench62.7%—
LMCA7.9%—
ForecastBench59.1—

Math Grok-3 mini leads

GPT-5 Nano: 29.4 (#241), Grok-3 mini: 42.1 (#85)

BenchmarkGPT-5 NanoGrok-3 mini
OTIS Mock AIME 2024-202581.1%77.8%
Omni-MATH54.6%31.8%
LMArena Math13171386
MATH Level 595.2%90.9%
FrontierMath (Feb 2025 set)8.3%5.9%
FrontierMath (Tiers 1-3)20%—
FrontierMath Tier 42.4%—
ProofBench12%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge Grok-3 mini leads

GPT-5 Nano: 35.9 (#178), Grok-3 mini: 46.4 (#81)

BenchmarkGPT-5 NanoGrok-3 mini
GPQA Diamond69.4%76.3%
MMLU-Pro77.8%79.9%
GPQA (HELM)67.9%67.5%
LMArena Expert13211395
SimpleQA Verified11.7%—
Confabulations—10.8%
Vectara Hallucination Rate10.5%—

Multimodal Not comparable

GPT-5 Nano: 31.3 (#108), Grok-3 mini: —

BenchmarkGPT-5 NanoGrok-3 mini
LMArena Vision1159—
VPCT37.2%—

Multilingual Grok-3 mini leads

GPT-5 Nano: 45.3 (#172), Grok-3 mini: 48.1 (#145)

BenchmarkGPT-5 NanoGrok-3 mini
LMArena Non-English13131352
LMArena Chinese13561387
LMArena German13271349
LMArena Japanese12261342
LMArena Korean12691335
LMArena Russian12961353
LMArena Spanish13601381
LMArena French—1357

Instruction Following Grok-3 mini leads

GPT-5 Nano: 75.0 (#79), Grok-3 mini: 78.5 (#9)

BenchmarkGPT-5 NanoGrok-3 mini
IFEval93.2%95.1%
LMArena Instruction Following13061357

Long Context Grok-3 mini leads

GPT-5 Nano: 31.3 (#281), Grok-3 mini: 41.0 (#147)

BenchmarkGPT-5 NanoGrok-3 mini
Fiction.LiveBench44.4%66.7%
LMArena Longer Query13121372

Writing & Preference Grok-3 mini leads

GPT-5 Nano: 39.1 (#249), Grok-3 mini: 52.5 (#169)

BenchmarkGPT-5 NanoGrok-3 mini
LMArena Text13201370
LMArena Creative Writing12491342
WildBench80.6%65.1%
LMArena Multi-Turn13111355
Short-Story Creative Writing—73.5%
EQ-Bench Creative Writing705—

Frequently asked questions

Is GPT-5 Nano better than Grok-3 mini?

Grok-3 mini is the stronger model overall, scoring 41.2 to 33.5 on the Noometry Index.

Is GPT-5 Nano or Grok-3 mini better for coding?

Grok-3 mini scores higher on coding benchmarks: 40.8 versus 33.6 in the Noometry coding category.

How many benchmarks do GPT-5 Nano and Grok-3 mini share?

31 benchmarks have published results for both models. GPT-5 Nano has 49 scored results on Noometry and Grok-3 mini has 35.

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