Noometry

Model comparison

C4ai Aya Expanse 32b vs Grok 4

Grok 4 is the stronger model overall, scoring 48.1 to 35.9 on the Noometry Index.

Last verified . 17 shared benchmarks.

C4ai Aya Expanse 32b Cohere

35.9

Rank #221 Confirmed

Grok 4 xAI

48.1

Rank #56 Confirmed

Summary

  • They share 17 benchmarks with published results for both. C4ai Aya Expanse 32b scores higher in 0 categories and Grok 4 in 8 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 leads 63.1 to 37.2.
  • C4ai Aya Expanse 32b has downloadable open weights; the other is API-only.

Side by side

C4ai Aya Expanse 32bGrok 4
ProviderCoherexAI
Noometry Index35.948.1
Released2024-10-242025-07-09
WeightsOpenProprietary
Context window128K—
Max output4K—
Input $ / M tokens——
Output $ / M tokens——
Results tracked1848

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Category by category

Coding Grok 4 leads

C4ai Aya Expanse 32b: 34.8 (#231), Grok 4: 50.3 (#46)

BenchmarkC4ai Aya Expanse 32bGrok 4
LMArena Coding11971408
Aider Polyglot—79.6%
WeirdML—45.7%

Agentic & Tool Use Not comparable

C4ai Aya Expanse 32b: —, Grok 4: 32.3 (#68)

BenchmarkC4ai Aya Expanse 32bGrok 4
Terminal-Bench—27.2%
Berkeley Function Calling Leaderboard—63%
GDPval—21.1%
Cybench—43%
DeepResearch Bench—47.3%
BALROG—43.6%
LMArena Search—1142
METR Time Horizons—66.6%

Reasoning Grok 4 leads

C4ai Aya Expanse 32b: 23.3 (#180), Grok 4: 36.7 (#65)

BenchmarkC4ai Aya Expanse 32bGrok 4
LMArena Hard Prompts11931409
ARC-AGI-2—16%
SimpleBench—60.5%
Kagi LLM Benchmark—73.6%
ARC-AGI-1—66.7%
Chess Puzzles—28%
Epoch Capabilities Index—146.44
ForecastBench—60.9

Math Grok 4 leads

C4ai Aya Expanse 32b: 34.0 (#197), Grok 4: 48.4 (#64)

BenchmarkC4ai Aya Expanse 32bGrok 4
LMArena Math12001422
OTIS Mock AIME 2024-2025—84%
Omni-MATH—60.3%
FrontierMath (Feb 2025 set)—19.7%
FrontierMath Tier 4 (v1)—2.1%

Knowledge Grok 4 leads

C4ai Aya Expanse 32b: 33.2 (#206), Grok 4: 53.8 (#55)

BenchmarkC4ai Aya Expanse 32bGrok 4
LMArena Expert11821415
GPQA Diamond—87%
MMLU-Pro—85.1%
Confabulations—12.4%
Vectara Hallucination Rate10.9%—
GPQA (HELM)—72.7%

Multimodal Not comparable

C4ai Aya Expanse 32b: —, Grok 4: 33.7 (#94)

BenchmarkC4ai Aya Expanse 32bGrok 4
LMArena Vision—1210
GeoBench—45%

Multilingual Grok 4 leads

C4ai Aya Expanse 32b: 38.4 (#230), Grok 4: 51.8 (#103)

BenchmarkC4ai Aya Expanse 32bGrok 4
LMArena Non-English12131403
LMArena Chinese12111427
LMArena French12481418
LMArena German11991429
LMArena Japanese11631394
LMArena Korean11581377
LMArena Russian12271410
LMArena Spanish11931420

Instruction Following Grok 4 leads

C4ai Aya Expanse 32b: 62.6 (#237), Grok 4: 79.2 (#5)

BenchmarkC4ai Aya Expanse 32bGrok 4
LMArena Instruction Following11961387
IFEval—94.9%

Long Context Grok 4 leads

C4ai Aya Expanse 32b: 37.2 (#220), Grok 4: 63.1 (#4)

BenchmarkC4ai Aya Expanse 32bGrok 4
LMArena Longer Query12281409
Fiction.LiveBench—94.4%

Writing & Preference Grok 4 leads

C4ai Aya Expanse 32b: 42.2 (#235), Grok 4: 58.5 (#116)

BenchmarkC4ai Aya Expanse 32bGrok 4
LMArena Text12241411
LMArena Creative Writing12001397
LMArena Multi-Turn11901416
Short-Story Creative Writing—76.9%
WildBench—79.7%

Frequently asked questions

Is C4ai Aya Expanse 32b better than Grok 4?

Grok 4 is the stronger model overall, scoring 48.1 to 35.9 on the Noometry Index.

Is C4ai Aya Expanse 32b or Grok 4 better for coding?

Grok 4 scores higher on coding benchmarks: 50.3 versus 34.8 in the Noometry coding category.

How many benchmarks do C4ai Aya Expanse 32b and Grok 4 share?

17 benchmarks have published results for both models. C4ai Aya Expanse 32b has 18 scored results on Noometry and Grok 4 has 48.

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