Noometry

Model comparison

Grok 3 vs Nemotron 3.5 Lightning

Grok 3 and Nemotron 3.5 Lightning score almost the same on the Noometry Index (39.9 vs 40.0), so choose on price, context window or the category you care about most.

Last verified . 18 shared benchmarks.

Grok 3 xAI

39.9

Rank #157 Confirmed

Nemotron 3.5 Lightning NVIDIA

40.0

Rank #155 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Grok 3 scores higher in 6 categories and Nemotron 3.5 Lightning in 2 categories; 7 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Nemotron 3.5 Lightning leads 26.8 to 13.7.
  • Nemotron 3.5 Lightning has downloadable open weights; the other is API-only.

Side by side

Grok 3Nemotron 3.5 Lightning
ProviderxAINVIDIA
Noometry Index39.940.0
Released2025-04-092026-08-11
WeightsProprietaryOpen
Context window—262K
Max output—262K
Input $ / M tokens—$0.05
Output $ / M tokens—$0.20
Results tracked4018

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Category by category

Coding Grok 3 leads

Grok 3: 41.9 (#115), Nemotron 3.5 Lightning: 40.4 (#141)

BenchmarkGrok 3Nemotron 3.5 Lightning
LMArena Coding14321375
Aider Polyglot53.3%—
WeirdML37.2%—

Agentic & Tool Use Not comparable

Grok 3: 30.5 (#76), Nemotron 3.5 Lightning: —

BenchmarkGrok 3Nemotron 3.5 Lightning
BALROG29.5%—

Reasoning Nemotron 3.5 Lightning leads

Grok 3: 13.7 (#333), Nemotron 3.5 Lightning: 26.8 (#127)

BenchmarkGrok 3Nemotron 3.5 Lightning
LMArena Hard Prompts14341337
ARC-AGI-20%—
SimpleBench36.1%—
Kagi LLM Benchmark61.3%—
ARC-AGI-15.5%—
Epoch Capabilities Index138.33—

Math Too close to call

Grok 3: 38.0 (#145), Nemotron 3.5 Lightning: 37.5 (#155)

BenchmarkGrok 3Nemotron 3.5 Lightning
LMArena Math13911359
OTIS Mock AIME 2024-202555.6%—
Omni-MATH46.4%—
MATH Level 588.7%—
FrontierMath (Feb 2025 set)3.8%—
FrontierMath Tier 4 (v1)0%—

Knowledge Grok 3 leads

Grok 3: 46.2 (#82), Nemotron 3.5 Lightning: 37.5 (#154)

BenchmarkGrok 3Nemotron 3.5 Lightning
LMArena Expert14211356
GPQA Diamond75.8%—
MMLU-Pro78.8%—
Confabulations14.2%—
Vectara Hallucination Rate5.8%—
GPQA (HELM)65%—

Multilingual Grok 3 leads

Grok 3: 52.3 (#87), Nemotron 3.5 Lightning: 44.0 (#180)

BenchmarkGrok 3Nemotron 3.5 Lightning
LMArena Non-English14101295
LMArena Chinese14481359
LMArena French14601366
LMArena German14311282
LMArena Japanese13871206
LMArena Korean13731238
LMArena Russian14161253
LMArena Spanish14171345

Instruction Following Grok 3 leads

Grok 3: 75.0 (#73), Nemotron 3.5 Lightning: 69.6 (#170)

BenchmarkGrok 3Nemotron 3.5 Lightning
LMArena Instruction Following14091318
IFEval88.4%—

Long Context Nemotron 3.5 Lightning leads

Grok 3: 38.7 (#192), Nemotron 3.5 Lightning: 39.9 (#165)

BenchmarkGrok 3Nemotron 3.5 Lightning
LMArena Longer Query14391314
Fiction.LiveBench58.3%—

Writing & Preference Grok 3 leads

Grok 3: 55.8 (#141), Nemotron 3.5 Lightning: 48.5 (#201)

BenchmarkGrok 3Nemotron 3.5 Lightning
LMArena Text14261327
LMArena Creative Writing14141254
EQ-Bench Creative Writing11861280
LMArena Multi-Turn14251328
Short-Story Creative Writing76.4%—
WildBench84.9%—

Frequently asked questions

Is Grok 3 better than Nemotron 3.5 Lightning?

Grok 3 and Nemotron 3.5 Lightning score almost the same on the Noometry Index (39.9 vs 40.0), so choose on price, context window or the category you care about most.

Is Grok 3 or Nemotron 3.5 Lightning better for coding?

Grok 3 scores higher on coding benchmarks: 41.9 versus 40.4 in the Noometry coding category.

How many benchmarks do Grok 3 and Nemotron 3.5 Lightning share?

18 benchmarks have published results for both models. Grok 3 has 40 scored results on Noometry and Nemotron 3.5 Lightning has 18.

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