Noometry

Model comparison

C4ai Aya Expanse 8b vs Grok 4.6

Grok 4.6 is the stronger model overall, scoring 56.9 to 34.9 on the Noometry Index.

Last verified . 14 shared benchmarks.

C4ai Aya Expanse 8b Cohere

34.9

Rank #229 Confirmed

Grok 4.6 xAI

56.9

Rank #21 Confirmed

Summary

  • They share 14 benchmarks with published results for both. C4ai Aya Expanse 8b scores higher in 0 categories and Grok 4.6 in 8 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.6 leads 61.4 to 22.4.
  • C4ai Aya Expanse 8b has downloadable open weights; the other is API-only.

Side by side

C4ai Aya Expanse 8bGrok 4.6
ProviderCoherexAI
Noometry Index34.956.9
Released—2026-08-12
WeightsOpenProprietary
Context window—500K
Max output—500K
Input $ / M tokens—$2
Output $ / M tokens—$6
Results tracked1549

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Grok 4.6 leads

C4ai Aya Expanse 8b: 33.8 (#252), Grok 4.6: 58.5 (#16)

BenchmarkC4ai Aya Expanse 8bGrok 4.6
LMArena Coding11601465
DeepSWE—67.5%
FrontierCode—48%
CursorBench—41.4%
LMArena WebDev—1617
FrontierSWE—25.3%
SciCode—56.5%
WeirdML—67.3%
ALE-Bench—1,508

Agentic & Tool Use Not comparable

C4ai Aya Expanse 8b: —, Grok 4.6: 39.4 (#27)

BenchmarkC4ai Aya Expanse 8bGrok 4.6
APEX-Agents—65.3%
GDP.pdf—17.2%
Vending-Bench 2—9,047

Reasoning Grok 4.6 leads

C4ai Aya Expanse 8b: 22.4 (#197), Grok 4.6: 61.4 (#20)

BenchmarkC4ai Aya Expanse 8bGrok 4.6
LMArena Hard Prompts11561447
ARC-AGI-2—67.1%
SimpleBench—75.9%
NYT Connections (extended)—80%
ARC-AGI-1—87.5%
CritPt—19.7%
Chess Puzzles—40%
EBR-Bench—30.5%
Mystery Game Puzzles—34%
DTBench—97.3%
LMCA—48.5%
Epoch Capabilities Index—156.44

Math Grok 4.6 leads

C4ai Aya Expanse 8b: 33.3 (#203), Grok 4.6: 67.0 (#24)

BenchmarkC4ai Aya Expanse 8bGrok 4.6
LMArena Math11681423
FrontierMath (Tiers 1-3)—66%
FrontierMath Tier 4—31.7%
OTIS Mock AIME 2024-2025—99.2%
ProofBench—51%

Knowledge Grok 4.6 leads

C4ai Aya Expanse 8b: 33.6 (#201), Grok 4.6: 63.3 (#20)

BenchmarkC4ai Aya Expanse 8bGrok 4.6
LMArena Expert11531467
GPQA Diamond—94%
SimpleQA Verified—49.3%
Vectara Hallucination Rate9.5%—

Multimodal Not comparable

C4ai Aya Expanse 8b: —, Grok 4.6: 43.6 (#23)

BenchmarkC4ai Aya Expanse 8bGrok 4.6
LMArena Vision—1263
Blueprint-Bench 2—33.2%
Furniture Assembly—40%
LMArena Document—1452

Multilingual Grok 4.6 leads

C4ai Aya Expanse 8b: 36.1 (#242), Grok 4.6: 53.0 (#74)

BenchmarkC4ai Aya Expanse 8bGrok 4.6
LMArena Non-English11801420
LMArena Chinese11811480
LMArena German11881431
LMArena Japanese11201376
LMArena Russian11971422
LMArena French—1461
LMArena Korean—1397
LMArena Spanish—1404

Instruction Following Grok 4.6 leads

C4ai Aya Expanse 8b: 60.1 (#253), Grok 4.6: 75.4 (#63)

BenchmarkC4ai Aya Expanse 8bGrok 4.6
LMArena Instruction Following11551431

Long Context Grok 4.6 leads

C4ai Aya Expanse 8b: 36.1 (#236), Grok 4.6: 44.5 (#66)

BenchmarkC4ai Aya Expanse 8bGrok 4.6
LMArena Longer Query11911454

Writing & Preference Grok 4.6 leads

C4ai Aya Expanse 8b: 39.0 (#250), Grok 4.6: 62.3 (#80)

BenchmarkC4ai Aya Expanse 8bGrok 4.6
LMArena Text11851428
LMArena Creative Writing11681428
LMArena Multi-Turn11601425

Frequently asked questions

Is C4ai Aya Expanse 8b better than Grok 4.6?

Grok 4.6 is the stronger model overall, scoring 56.9 to 34.9 on the Noometry Index.

Is C4ai Aya Expanse 8b or Grok 4.6 better for coding?

Grok 4.6 scores higher on coding benchmarks: 58.5 versus 33.8 in the Noometry coding category.

How many benchmarks do C4ai Aya Expanse 8b and Grok 4.6 share?

14 benchmarks have published results for both models. C4ai Aya Expanse 8b has 15 scored results on Noometry and Grok 4.6 has 49.

Related comparisons

Go deeper