Noometry

Model comparison

GPT-4.5 vs Grok 4

Grok 4 is the stronger model overall, scoring 48.1 to 37.2 on the Noometry Index.

Last verified . 30 shared benchmarks.

GPT-4.5 OpenAI

37.2

Rank #208 Confirmed

Grok 4 xAI

48.1

Rank #56 Confirmed

Summary

  • They share 30 benchmarks with published results for both. GPT-4.5 scores higher in 2 categories and Grok 4 in 8 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4 leads 36.7 to 13.9.
  • The biggest single-benchmark swing is ARC-AGI-1: 10.3% for GPT-4.5 and 66.7% for Grok 4.

Side by side

GPT-4.5Grok 4
ProviderOpenAIxAI
Noometry Index37.248.1
Released2025-02-272025-07-09
WeightsProprietaryProprietary
Context window——
Max output——
Input $ / M tokens——
Output $ / M tokens——
Results tracked4248

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Category by category

Coding Grok 4 leads

GPT-4.5: 42.2 (#109), Grok 4: 50.3 (#46)

BenchmarkGPT-4.5Grok 4
Aider Polyglot44.9%79.6%
WeirdML39.4%45.7%
LMArena Coding13961408
LiveBench Coding75.2%—

Agentic & Tool Use Grok 4 leads

GPT-4.5: 27.9 (#97), Grok 4: 32.3 (#68)

BenchmarkGPT-4.5Grok 4
Cybench17.5%43%
Terminal-Bench—27.2%
Berkeley Function Calling Leaderboard—63%
GDPval—21.1%
DeepResearch Bench—47.3%
BALROG—43.6%
LMArena Search—1142
METR Time Horizons—66.6%

Reasoning Grok 4 leads

GPT-4.5: 13.9 (#330), Grok 4: 36.7 (#65)

BenchmarkGPT-4.5Grok 4
ARC-AGI-20.8%16%
SimpleBench34.5%60.5%
ARC-AGI-110.3%66.7%
LMArena Hard Prompts14031409
Epoch Capabilities Index136.74146.44
ForecastBench61.760.9
Kagi LLM Benchmark—73.6%
Chess Puzzles—28%
EnigmaEval3.2%—
LiveBench Reasoning71.1%—
LiveBench Data Analysis64.3%—
LiveBench69%—

Math Grok 4 leads

GPT-4.5: 32.6 (#211), Grok 4: 48.4 (#64)

BenchmarkGPT-4.5Grok 4
OTIS Mock AIME 2024-202537.8%84%
LMArena Math14121422
Omni-MATH—60.3%
LiveBench Math69.3%—
MATH Level 578.6%—
FrontierMath (Feb 2025 set)—19.7%
FrontierMath Tier 4 (v1)—2.1%

Knowledge Grok 4 leads

GPT-4.5: 32.5 (#211), Grok 4: 53.8 (#55)

BenchmarkGPT-4.5Grok 4
GPQA Diamond68.7%87%
Confabulations13.6%12.4%
LMArena Expert13941415
Humanity's Last Exam5.4%—
MMLU-Pro—85.1%
GPQA (HELM)—72.7%

Multimodal GPT-4.5 leads

GPT-4.5: 37.6 (#71), Grok 4: 33.7 (#94)

BenchmarkGPT-4.5Grok 4
LMArena Vision11951210
GeoBench—45%
VPCT45%—

Multilingual Too close to call

GPT-4.5: 52.5 (#83), Grok 4: 51.8 (#103)

BenchmarkGPT-4.5Grok 4
LMArena Non-English14131403
LMArena Chinese14211427
LMArena French14181418
LMArena German14571429
LMArena Japanese14161394
LMArena Korean13921377
LMArena Russian14191410
LMArena Spanish—1420

Instruction Following Grok 4 leads

GPT-4.5: 72.6 (#134), Grok 4: 79.2 (#5)

BenchmarkGPT-4.5Grok 4
LMArena Instruction Following14041387
LiveBench Instruction Following72.3%—
IFEval—94.9%

Long Context Grok 4 leads

GPT-4.5: 40.4 (#155), Grok 4: 63.1 (#4)

BenchmarkGPT-4.5Grok 4
Fiction.LiveBench63.9%94.4%
LMArena Longer Query14061409

Writing & Preference Grok 4 leads

GPT-4.5: 56.9 (#134), Grok 4: 58.5 (#116)

BenchmarkGPT-4.5Grok 4
LMArena Text14171411
LMArena Creative Writing13941397
Short-Story Creative Writing75.6%76.9%
LMArena Multi-Turn14441416
EQ-Bench Creative Writing1258—
WildBench—79.7%
LiveBench Language61.5%—

Frequently asked questions

Is GPT-4.5 better than Grok 4?

Grok 4 is the stronger model overall, scoring 48.1 to 37.2 on the Noometry Index.

Is GPT-4.5 or Grok 4 better for coding?

Grok 4 scores higher on coding benchmarks: 50.3 versus 42.2 in the Noometry coding category.

How many benchmarks do GPT-4.5 and Grok 4 share?

30 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Grok 4 has 48.

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