Noometry

Model comparison

GPT-5 Nano vs Grok 4

Grok 4 is the stronger model overall, scoring 48.1 to 33.5 on the Noometry Index.

Last verified . 36 shared benchmarks.

GPT-5 Nano OpenAI

33.5

Rank #241 Confirmed

Grok 4 xAI

48.1

Rank #56 Confirmed

Summary

  • They share 36 benchmarks with published results for both. GPT-5 Nano scores higher in 0 categories and Grok 4 in 10 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 leads 63.1 to 31.3.
  • The biggest single-benchmark swing is Fiction.LiveBench: 44.4% for GPT-5 Nano and 94.4% for Grok 4.

Side by side

GPT-5 NanoGrok 4
ProviderOpenAIxAI
Noometry Index33.548.1
Released2025-08-072025-07-09
WeightsProprietaryProprietary
Context window400K—
Max output128K—
Input $ / M tokens$0.05—
Output $ / M tokens$0.40—
Results tracked4948

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Category by category

Coding Grok 4 leads

GPT-5 Nano: 33.6 (#254), Grok 4: 50.3 (#46)

BenchmarkGPT-5 NanoGrok 4
WeirdML38.1%45.7%
LMArena Coding13511408
SWE-bench Verified (bash only)34.8%—
Aider Polyglot—79.6%
ALE-Bench718.67—

Agentic & Tool Use Grok 4 leads

GPT-5 Nano: 25.8 (#106), Grok 4: 32.3 (#68)

BenchmarkGPT-5 NanoGrok 4
Terminal-Bench21.8%27.2%
Berkeley Function Calling Leaderboard51.5%63%
GDPval—21.1%
Cybench—43%
DeepResearch Bench—47.3%
BALROG—43.6%
LMArena Search—1142
METR Time Horizons—66.6%

Reasoning Grok 4 leads

GPT-5 Nano: 16.3 (#306), Grok 4: 36.7 (#65)

BenchmarkGPT-5 NanoGrok 4
ARC-AGI-22.6%16%
Kagi LLM Benchmark62.2%73.6%
ARC-AGI-120.7%66.7%
Chess Puzzles27%28%
LMArena Hard Prompts13281409
Epoch Capabilities Index139.38146.44
ForecastBench59.160.9
SimpleBench—60.5%
Mystery Game Puzzles9%—
DTBench62.7%—
LMCA7.9%—

Math Grok 4 leads

GPT-5 Nano: 29.4 (#241), Grok 4: 48.4 (#64)

BenchmarkGPT-5 NanoGrok 4
OTIS Mock AIME 2024-202581.1%84%
Omni-MATH54.6%60.3%
LMArena Math13171422
FrontierMath (Feb 2025 set)8.3%19.7%
FrontierMath Tier 4 (v1)2.1%2.1%
FrontierMath (Tiers 1-3)20%—
FrontierMath Tier 42.4%—
ProofBench12%—
MATH Level 595.2%—

Knowledge Grok 4 leads

GPT-5 Nano: 35.9 (#178), Grok 4: 53.8 (#55)

BenchmarkGPT-5 NanoGrok 4
GPQA Diamond69.4%87%
MMLU-Pro77.8%85.1%
GPQA (HELM)67.9%72.7%
LMArena Expert13211415
SimpleQA Verified11.7%—
Confabulations—12.4%
Vectara Hallucination Rate10.5%—

Multimodal Grok 4 leads

GPT-5 Nano: 31.3 (#108), Grok 4: 33.7 (#94)

BenchmarkGPT-5 NanoGrok 4
LMArena Vision11591210
GeoBench—45%
VPCT37.2%—

Multilingual Grok 4 leads

GPT-5 Nano: 45.3 (#172), Grok 4: 51.8 (#103)

BenchmarkGPT-5 NanoGrok 4
LMArena Non-English13131403
LMArena Chinese13561427
LMArena German13271429
LMArena Japanese12261394
LMArena Korean12691377
LMArena Russian12961410
LMArena Spanish13601420
LMArena French—1418

Instruction Following Grok 4 leads

GPT-5 Nano: 75.0 (#79), Grok 4: 79.2 (#5)

BenchmarkGPT-5 NanoGrok 4
IFEval93.2%94.9%
LMArena Instruction Following13061387

Long Context Grok 4 leads

GPT-5 Nano: 31.3 (#281), Grok 4: 63.1 (#4)

BenchmarkGPT-5 NanoGrok 4
Fiction.LiveBench44.4%94.4%
LMArena Longer Query13121409

Writing & Preference Grok 4 leads

GPT-5 Nano: 39.1 (#249), Grok 4: 58.5 (#116)

BenchmarkGPT-5 NanoGrok 4
LMArena Text13201411
LMArena Creative Writing12491397
WildBench80.6%79.7%
LMArena Multi-Turn13111416
Short-Story Creative Writing—76.9%
EQ-Bench Creative Writing705—

Frequently asked questions

Is GPT-5 Nano better than Grok 4?

Grok 4 is the stronger model overall, scoring 48.1 to 33.5 on the Noometry Index.

Is GPT-5 Nano or Grok 4 better for coding?

Grok 4 scores higher on coding benchmarks: 50.3 versus 33.6 in the Noometry coding category.

How many benchmarks do GPT-5 Nano and Grok 4 share?

36 benchmarks have published results for both models. GPT-5 Nano has 49 scored results on Noometry and Grok 4 has 48.

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