Noometry

Model comparison

Grok 4.1 Fast vs Nemotron 4 340b Instruct

Grok 4.1 Fast is the stronger model overall, scoring 40.9 to 35.3 on the Noometry Index.

Last verified . 17 shared benchmarks.

Grok 4.1 Fast xAI

40.9

Rank #131 Confirmed

Nemotron 4 340b Instruct NVIDIA

35.3

Rank #218 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Grok 4.1 Fast scores higher in 6 categories and Nemotron 4 340b Instruct in 2 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.1 Fast leads 42.3 to 22.4.
  • Nemotron 4 340b Instruct has downloadable open weights; the other is API-only.

Side by side

Grok 4.1 FastNemotron 4 340b Instruct
ProviderxAINVIDIA
Noometry Index40.935.3
Released2025-06-272024-06-14
WeightsProprietaryOpen
Context window128K—
Max output30K—
Input $ / M tokens$0.20—
Output $ / M tokens$0.50—
Results tracked3217

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Category by category

Coding Too close to call

Grok 4.1 Fast: 33.8 (#236), Nemotron 4 340b Instruct: 34.6 (#223)

BenchmarkGrok 4.1 FastNemotron 4 340b Instruct
LMArena Coding14111209
LMArena WebDev1241—
ALE-Bench394.93—

Agentic & Tool Use Not comparable

Grok 4.1 Fast: 36.1 (#35), Nemotron 4 340b Instruct: —

BenchmarkGrok 4.1 FastNemotron 4 340b Instruct
Berkeley Function Calling Leaderboard69.6%—
τ²-bench Banking13.1%—
LMArena Search1171—
Vending-Bench 21,107—

Reasoning Grok 4.1 Fast leads

Grok 4.1 Fast: 42.3 (#45), Nemotron 4 340b Instruct: 22.4 (#180)

BenchmarkGrok 4.1 FastNemotron 4 340b Instruct
LMArena Hard Prompts14071202
SimpleBench56%—
NYT Connections (extended)87.4%—
DTBench87.7%—
ForecastBench61—

Math Too close to call

Grok 4.1 Fast: 30.9 (#201), Nemotron 4 340b Instruct: 31.7 (#193)

BenchmarkGrok 4.1 FastNemotron 4 340b Instruct
LMArena Math14081216
MathArena Final-Answer Competitions60.9%—
ProofBench4%—

Knowledge Grok 4.1 Fast leads

Grok 4.1 Fast: 32.6 (#203), Nemotron 4 340b Instruct: 31.4 (#212)

BenchmarkGrok 4.1 FastNemotron 4 340b Instruct
LMArena Expert13981171
Vectara Hallucination Rate17.8%—

Multimodal Not comparable

Grok 4.1 Fast: 36.3 (#71), Nemotron 4 340b Instruct: —

BenchmarkGrok 4.1 FastNemotron 4 340b Instruct
LMArena Vision1201—

Multilingual Grok 4.1 Fast leads

Grok 4.1 Fast: 51.1 (#110), Nemotron 4 340b Instruct: 38.0 (#228)

BenchmarkGrok 4.1 FastNemotron 4 340b Instruct
LMArena Non-English13911206
LMArena Chinese14411214
LMArena French14161196
LMArena German14041192
LMArena Japanese13471128
LMArena Korean13611148
LMArena Russian13871219
LMArena Spanish14111195

Instruction Following Grok 4.1 Fast leads

Grok 4.1 Fast: 72.8 (#127), Nemotron 4 340b Instruct: 63.3 (#227)

BenchmarkGrok 4.1 FastNemotron 4 340b Instruct
LMArena Instruction Following13761203

Long Context Grok 4.1 Fast leads

Grok 4.1 Fast: 42.4 (#121), Nemotron 4 340b Instruct: 37.1 (#216)

BenchmarkGrok 4.1 FastNemotron 4 340b Instruct
LMArena Longer Query13901225

Writing & Preference Grok 4.1 Fast leads

Grok 4.1 Fast: 57.4 (#126), Nemotron 4 340b Instruct: 42.9 (#229)

BenchmarkGrok 4.1 FastNemotron 4 340b Instruct
LMArena Text14081225
LMArena Creative Writing13941203
LMArena Multi-Turn13891214
EQ-Bench Creative Writing1327—

Frequently asked questions

Is Grok 4.1 Fast better than Nemotron 4 340b Instruct?

Grok 4.1 Fast is the stronger model overall, scoring 40.9 to 35.3 on the Noometry Index.

Is Grok 4.1 Fast or Nemotron 4 340b Instruct better for coding?

They score almost the same on coding (33.8 vs 34.6); test both on your own repository before choosing.

How many benchmarks do Grok 4.1 Fast and Nemotron 4 340b Instruct share?

17 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Nemotron 4 340b Instruct has 17.

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