Model comparison
C4ai Aya Expanse 8b vs Grok 3
Grok 3 is the stronger model overall, scoring 39.6 to 34.3 on the Noometry Index.
Last verified . 15 shared benchmarks.
CohereSummary
- They share 15 benchmarks with published results for both. C4ai Aya Expanse 8b scores higher in 1 category and Grok 3 in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 3 leads 56.0 to 39.2.
- C4ai Aya Expanse 8b has downloadable open weights; the other is API-only.
Side by side
| C4ai Aya Expanse 8b | Grok 3 | |
|---|---|---|
| Provider | Cohere | xAI |
| Noometry Index | 34.3 | 39.6 |
| Released | 2024-10-24 | 2025-04-09 |
| Weights | Open | Proprietary |
| Context window | 8K | — |
| Max output | 4K | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 15 | 40 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Grok 3 leads
C4ai Aya Expanse 8b: 33.2 (#252), Grok 3: 41.5 (#113)
| Benchmark | C4ai Aya Expanse 8b | Grok 3 |
|---|---|---|
| LMArena Coding | 1161 | 1432 |
| Aider Polyglot | — | 53.3% |
| WeirdML | — | 37.2% |
Agentic & Tool Use Not comparable
C4ai Aya Expanse 8b: —, Grok 3: 30.2 (#69)
| Benchmark | C4ai Aya Expanse 8b | Grok 3 |
|---|---|---|
| BALROG | — | 29.5% |
Reasoning C4ai Aya Expanse 8b leads
C4ai Aya Expanse 8b: 21.4 (#198), Grok 3: 13.8 (#322)
| Benchmark | C4ai Aya Expanse 8b | Grok 3 |
|---|---|---|
| LMArena Hard Prompts | 1156 | 1433 |
| ARC-AGI-2 | — | 0% |
| SimpleBench | — | 36.1% |
| Kagi LLM Benchmark | — | 61.3% |
| ARC-AGI-1 | — | 5.5% |
| Epoch Capabilities Index | — | 138.34 |
Math Grok 3 leads
C4ai Aya Expanse 8b: 30.8 (#204), Grok 3: 36.2 (#122)
| Benchmark | C4ai Aya Expanse 8b | Grok 3 |
|---|---|---|
| LMArena Math | 1168 | 1390 |
| OTIS Mock AIME 2024-2025 | — | 55.6% |
| Omni-MATH | — | 46.4% |
| MATH Level 5 | — | 88.7% |
| FrontierMath (Feb 2025 set) | — | 3.8% |
| FrontierMath Tier 4 (v1) | — | 0% |
Knowledge Grok 3 leads
C4ai Aya Expanse 8b: 33.0 (#197), Grok 3: 46.0 (#76)
| Benchmark | C4ai Aya Expanse 8b | Grok 3 |
|---|---|---|
| Vectara Hallucination Rate | 9.5% | 5.8% |
| LMArena Expert | 1153 | 1420 |
| GPQA Diamond | — | 75.8% |
| MMLU-Pro | — | 78.8% |
| Confabulations | — | 14.2% |
| GPQA (HELM) | — | 65% |
Multilingual Grok 3 leads
C4ai Aya Expanse 8b: 36.3 (#237), Grok 3: 52.5 (#81)
| Benchmark | C4ai Aya Expanse 8b | Grok 3 |
|---|---|---|
| LMArena Non-English | 1180 | 1411 |
| LMArena Chinese | 1181 | 1448 |
| LMArena German | 1188 | 1431 |
| LMArena Japanese | 1120 | 1389 |
| LMArena Russian | 1197 | 1416 |
| LMArena French | — | 1460 |
| LMArena Korean | — | 1374 |
| LMArena Spanish | — | 1417 |
Instruction Following Grok 3 leads
C4ai Aya Expanse 8b: 60.4 (#248), Grok 3: 75.2 (#69)
| Benchmark | C4ai Aya Expanse 8b | Grok 3 |
|---|---|---|
| LMArena Instruction Following | 1155 | 1409 |
| IFEval | — | 88.4% |
Long Context Grok 3 leads
C4ai Aya Expanse 8b: 36.1 (#231), Grok 3: 38.7 (#187)
| Benchmark | C4ai Aya Expanse 8b | Grok 3 |
|---|---|---|
| LMArena Longer Query | 1192 | 1439 |
| Fiction.LiveBench | — | 58.3% |
Writing & Preference Grok 3 leads
C4ai Aya Expanse 8b: 39.2 (#245), Grok 3: 56.0 (#136)
| Benchmark | C4ai Aya Expanse 8b | Grok 3 |
|---|---|---|
| LMArena Text | 1185 | 1426 |
| LMArena Creative Writing | 1168 | 1414 |
| LMArena Multi-Turn | 1160 | 1424 |
| Short-Story Creative Writing | — | 76.4% |
| EQ-Bench Creative Writing | — | 1186 |
| WildBench | — | 84.9% |
Frequently asked questions
Is C4ai Aya Expanse 8b better than Grok 3?
Grok 3 is the stronger model overall, scoring 39.6 to 34.3 on the Noometry Index.
Is C4ai Aya Expanse 8b or Grok 3 better for coding?
Grok 3 scores higher on coding benchmarks: 41.5 versus 33.2 in the Noometry coding category.
How many benchmarks do C4ai Aya Expanse 8b and Grok 3 share?
15 benchmarks have published results for both models. C4ai Aya Expanse 8b has 15 scored results on Noometry and Grok 3 has 40.