Noometry

Model comparison

Grok 4.1 Fast vs Olmo 3.1 32b Instruct

Grok 4.1 Fast is the stronger model overall, scoring 40.9 to 38.8 on the Noometry Index.

Last verified . 16 shared benchmarks.

Grok 4.1 Fast xAI

40.9

Rank #131 Confirmed

Olmo 3.1 32b Instruct Allen Institute for AI (Ai2)

38.8

Rank #168 Confirmed

Summary

  • They share 16 benchmarks with published results for both. Grok 4.1 Fast scores higher in 5 categories and Olmo 3.1 32b Instruct in 3 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.1 Fast leads 42.3 to 25.4.
  • Olmo 3.1 32b Instruct has downloadable open weights; the other is API-only.

Side by side

Grok 4.1 FastOlmo 3.1 32b Instruct
ProviderxAIAllen Institute for AI (Ai2)
Noometry Index40.938.8
Released2025-06-27—
WeightsProprietaryOpen
Context window128K—
Max output30K—
Input $ / M tokens$0.20—
Output $ / M tokens$0.50—
Results tracked3216

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Category by category

Coding Olmo 3.1 32b Instruct leads

Grok 4.1 Fast: 33.8 (#236), Olmo 3.1 32b Instruct: 38.9 (#154)

BenchmarkGrok 4.1 FastOlmo 3.1 32b Instruct
LMArena Coding14111346
LMArena WebDev1241—
ALE-Bench394.93—

Agentic & Tool Use Not comparable

Grok 4.1 Fast: 36.1 (#35), Olmo 3.1 32b Instruct: —

BenchmarkGrok 4.1 FastOlmo 3.1 32b 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), Olmo 3.1 32b Instruct: 25.4 (#131)

BenchmarkGrok 4.1 FastOlmo 3.1 32b Instruct
LMArena Hard Prompts14071322
SimpleBench56%—
NYT Connections (extended)87.4%—
DTBench87.7%—
ForecastBench61—

Math Olmo 3.1 32b Instruct leads

Grok 4.1 Fast: 30.9 (#201), Olmo 3.1 32b Instruct: 33.6 (#169)

BenchmarkGrok 4.1 FastOlmo 3.1 32b Instruct
LMArena Math14081305
MathArena Final-Answer Competitions60.9%—
ProofBench4%—

Knowledge Olmo 3.1 32b Instruct leads

Grok 4.1 Fast: 32.6 (#203), Olmo 3.1 32b Instruct: 35.4 (#175)

BenchmarkGrok 4.1 FastOlmo 3.1 32b Instruct
LMArena Expert13981307
Vectara Hallucination Rate17.8%—

Multimodal Not comparable

Grok 4.1 Fast: 36.3 (#71), Olmo 3.1 32b Instruct: —

BenchmarkGrok 4.1 FastOlmo 3.1 32b Instruct
LMArena Vision1201—

Multilingual Grok 4.1 Fast leads

Grok 4.1 Fast: 51.1 (#110), Olmo 3.1 32b Instruct: 42.8 (#185)

BenchmarkGrok 4.1 FastOlmo 3.1 32b Instruct
LMArena Non-English13911275
LMArena Chinese14411304
LMArena French14161328
LMArena German14041283
LMArena Korean13611206
LMArena Russian13871268
LMArena Spanish14111337
LMArena Japanese1347—

Instruction Following Grok 4.1 Fast leads

Grok 4.1 Fast: 72.8 (#127), Olmo 3.1 32b Instruct: 68.8 (#182)

BenchmarkGrok 4.1 FastOlmo 3.1 32b Instruct
LMArena Instruction Following13761298

Long Context Grok 4.1 Fast leads

Grok 4.1 Fast: 42.4 (#121), Olmo 3.1 32b Instruct: 39.9 (#161)

BenchmarkGrok 4.1 FastOlmo 3.1 32b Instruct
LMArena Longer Query13901312

Writing & Preference Grok 4.1 Fast leads

Grok 4.1 Fast: 57.4 (#126), Olmo 3.1 32b Instruct: 50.4 (#179)

BenchmarkGrok 4.1 FastOlmo 3.1 32b Instruct
LMArena Text14081311
LMArena Creative Writing13941264
LMArena Multi-Turn13891309
EQ-Bench Creative Writing1327—

Frequently asked questions

Is Grok 4.1 Fast better than Olmo 3.1 32b Instruct?

Grok 4.1 Fast is the stronger model overall, scoring 40.9 to 38.8 on the Noometry Index.

Is Grok 4.1 Fast or Olmo 3.1 32b Instruct better for coding?

Olmo 3.1 32b Instruct scores higher on coding benchmarks: 38.9 versus 33.8 in the Noometry coding category.

How many benchmarks do Grok 4.1 Fast and Olmo 3.1 32b Instruct share?

16 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Olmo 3.1 32b Instruct has 16.

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