Noometry

Model comparison

Grok 4 vs Nemotron 3.5 Lightning

Grok 4 is the stronger model overall, scoring 48.1 to 40.0 on the Noometry Index.

Last verified . 17 shared benchmarks.

Grok 4 xAI

48.1

Rank #56 Confirmed

Nemotron 3.5 Lightning NVIDIA

40.0

Rank #155 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Grok 4 scores higher in 8 categories and Nemotron 3.5 Lightning in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 leads 63.1 to 39.9.
  • Nemotron 3.5 Lightning has downloadable open weights; the other is API-only.

Side by side

Grok 4Nemotron 3.5 Lightning
ProviderxAINVIDIA
Noometry Index48.140.0
Released2025-07-092026-08-11
WeightsProprietaryOpen
Context window—262K
Max output—262K
Input $ / M tokens—$0.05
Output $ / M tokens—$0.20
Results tracked4818

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Category by category

Coding Grok 4 leads

Grok 4: 50.3 (#46), Nemotron 3.5 Lightning: 40.4 (#141)

BenchmarkGrok 4Nemotron 3.5 Lightning
LMArena Coding14081375
Aider Polyglot79.6%—
WeirdML45.7%—

Agentic & Tool Use Not comparable

Grok 4: 32.3 (#68), Nemotron 3.5 Lightning: —

BenchmarkGrok 4Nemotron 3.5 Lightning
Terminal-Bench27.2%—
Berkeley Function Calling Leaderboard63%—
GDPval21.1%—
Cybench43%—
DeepResearch Bench47.3%—
BALROG43.6%—
LMArena Search1142—
METR Time Horizons66.6%—

Reasoning Grok 4 leads

Grok 4: 36.7 (#65), Nemotron 3.5 Lightning: 26.8 (#127)

BenchmarkGrok 4Nemotron 3.5 Lightning
LMArena Hard Prompts14091337
ARC-AGI-216%—
SimpleBench60.5%—
Kagi LLM Benchmark73.6%—
ARC-AGI-166.7%—
Chess Puzzles28%—
Epoch Capabilities Index146.44—
ForecastBench60.9—

Math Grok 4 leads

Grok 4: 48.4 (#64), Nemotron 3.5 Lightning: 37.5 (#155)

BenchmarkGrok 4Nemotron 3.5 Lightning
LMArena Math14221359
OTIS Mock AIME 2024-202584%—
Omni-MATH60.3%—
FrontierMath (Feb 2025 set)19.7%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge Grok 4 leads

Grok 4: 53.8 (#55), Nemotron 3.5 Lightning: 37.5 (#154)

BenchmarkGrok 4Nemotron 3.5 Lightning
LMArena Expert14151356
GPQA Diamond87%—
MMLU-Pro85.1%—
Confabulations12.4%—
GPQA (HELM)72.7%—

Multimodal Not comparable

Grok 4: 33.7 (#94), Nemotron 3.5 Lightning: —

BenchmarkGrok 4Nemotron 3.5 Lightning
LMArena Vision1210—
GeoBench45%—

Multilingual Grok 4 leads

Grok 4: 51.8 (#103), Nemotron 3.5 Lightning: 44.0 (#180)

BenchmarkGrok 4Nemotron 3.5 Lightning
LMArena Non-English14031295
LMArena Chinese14271359
LMArena French14181366
LMArena German14291282
LMArena Japanese13941206
LMArena Korean13771238
LMArena Russian14101253
LMArena Spanish14201345

Instruction Following Grok 4 leads

Grok 4: 79.2 (#5), Nemotron 3.5 Lightning: 69.6 (#170)

BenchmarkGrok 4Nemotron 3.5 Lightning
LMArena Instruction Following13871318
IFEval94.9%—

Long Context Grok 4 leads

Grok 4: 63.1 (#4), Nemotron 3.5 Lightning: 39.9 (#165)

BenchmarkGrok 4Nemotron 3.5 Lightning
LMArena Longer Query14091314
Fiction.LiveBench94.4%—

Writing & Preference Grok 4 leads

Grok 4: 58.5 (#116), Nemotron 3.5 Lightning: 48.5 (#201)

BenchmarkGrok 4Nemotron 3.5 Lightning
LMArena Text14111327
LMArena Creative Writing13971254
LMArena Multi-Turn14161328
Short-Story Creative Writing76.9%—
EQ-Bench Creative Writing—1280
WildBench79.7%—

Frequently asked questions

Is Grok 4 better than Nemotron 3.5 Lightning?

Grok 4 is the stronger model overall, scoring 48.1 to 40.0 on the Noometry Index.

Is Grok 4 or Nemotron 3.5 Lightning better for coding?

Grok 4 scores higher on coding benchmarks: 50.3 versus 40.4 in the Noometry coding category.

How many benchmarks do Grok 4 and Nemotron 3.5 Lightning share?

17 benchmarks have published results for both models. Grok 4 has 48 scored results on Noometry and Nemotron 3.5 Lightning has 18.

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