Model comparison
C4ai Aya Expanse 8b vs Mistral Medium
Mistral Medium is the stronger model overall, scoring 36.3 to 34.9 on the Noometry Index.
Last verified . 15 shared benchmarks.
Cohere
Mistral AISummary
- They share 15 benchmarks with published results for both. C4ai Aya Expanse 8b scores higher in 2 categories and Mistral Medium in 6 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Mistral Medium leads 60.0 to 39.0.
- The biggest single-benchmark swing is Vectara Hallucination Rate: 9.5% for C4ai Aya Expanse 8b and 22.7% for Mistral Medium.
Side by side
| C4ai Aya Expanse 8b | Mistral Medium | |
|---|---|---|
| Provider | Cohere | Mistral AI |
| Noometry Index | 34.9 | 36.3 |
| Released | — | 2023-12-11 |
| Weights | Open | Open |
| Context window | — | 262K |
| Max output | — | 262K |
| Input $ / M tokens | — | $1.50 |
| Output $ / M tokens | — | $7.50 |
| Results tracked | 15 | 36 |
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Category by category
Coding Too close to call
C4ai Aya Expanse 8b: 33.8 (#252), Mistral Medium: 34.2 (#243)
| Benchmark | C4ai Aya Expanse 8b | Mistral Medium |
|---|---|---|
| LMArena Coding | 1160 | 1434 |
| FrontierCode | — | 8% |
| SciCode | — | 40.2% |
| WeirdML | — | 43.7% |
| ALE-Bench | — | 763.98 |
Agentic & Tool Use Not comparable
C4ai Aya Expanse 8b: —, Mistral Medium: 28.3 (#90)
| Benchmark | C4ai Aya Expanse 8b | Mistral Medium |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 37.7% |
Reasoning Mistral Medium leads
C4ai Aya Expanse 8b: 22.4 (#197), Mistral Medium: 24.0 (#167)
| Benchmark | C4ai Aya Expanse 8b | Mistral Medium |
|---|---|---|
| LMArena Hard Prompts | 1156 | 1426 |
| Kagi LLM Benchmark | — | 50% |
| CritPt | — | 0% |
| DTBench | — | 75.5% |
| LMCA | — | 26.1% |
| Surface Evolver Bench | — | 26.9% |
Math C4ai Aya Expanse 8b leads
C4ai Aya Expanse 8b: 33.3 (#203), Mistral Medium: 28.1 (#245)
| Benchmark | C4ai Aya Expanse 8b | Mistral Medium |
|---|---|---|
| LMArena Math | 1168 | 1408 |
| OTIS Mock AIME 2024-2025 | — | 32.2% |
| ProofBench | — | 9% |
| MATH Level 5 | — | 81.6% |
| FrontierMath (Feb 2025 set) | — | 0.3% |
Knowledge C4ai Aya Expanse 8b leads
C4ai Aya Expanse 8b: 33.6 (#201), Mistral Medium: 25.0 (#265)
| Benchmark | C4ai Aya Expanse 8b | Mistral Medium |
|---|---|---|
| Vectara Hallucination Rate | 9.5% | 22.7% |
| LMArena Expert | 1153 | 1408 |
| GPQA Diamond | — | 59.5% |
| Humanity's Last Exam | — | 4.5% |
Multimodal Not comparable
C4ai Aya Expanse 8b: —, Mistral Medium: 35.3 (#88)
| Benchmark | C4ai Aya Expanse 8b | Mistral Medium |
|---|---|---|
| LMArena Vision | — | 1172 |
Multilingual Mistral Medium leads
C4ai Aya Expanse 8b: 36.1 (#242), Mistral Medium: 52.1 (#91)
| Benchmark | C4ai Aya Expanse 8b | Mistral Medium |
|---|---|---|
| LMArena Non-English | 1180 | 1408 |
| LMArena Chinese | 1181 | 1447 |
| LMArena German | 1188 | 1432 |
| LMArena Japanese | 1120 | 1378 |
| LMArena Russian | 1197 | 1411 |
| LMArena French | — | 1459 |
| LMArena Korean | — | 1380 |
| LMArena Spanish | — | 1433 |
Instruction Following Mistral Medium leads
C4ai Aya Expanse 8b: 60.1 (#253), Mistral Medium: 73.7 (#116)
| Benchmark | C4ai Aya Expanse 8b | Mistral Medium |
|---|---|---|
| LMArena Instruction Following | 1155 | 1398 |
Long Context Mistral Medium leads
C4ai Aya Expanse 8b: 36.1 (#236), Mistral Medium: 42.9 (#114)
| Benchmark | C4ai Aya Expanse 8b | Mistral Medium |
|---|---|---|
| LMArena Longer Query | 1191 | 1406 |
Writing & Preference Mistral Medium leads
C4ai Aya Expanse 8b: 39.0 (#250), Mistral Medium: 60.0 (#103)
| Benchmark | C4ai Aya Expanse 8b | Mistral Medium |
|---|---|---|
| LMArena Text | 1185 | 1424 |
| LMArena Creative Writing | 1168 | 1391 |
| LMArena Multi-Turn | 1160 | 1418 |
| Short-Story Creative Writing | — | 77.3% |
Frequently asked questions
Is C4ai Aya Expanse 8b better than Mistral Medium?
Mistral Medium is the stronger model overall, scoring 36.3 to 34.9 on the Noometry Index.
Is C4ai Aya Expanse 8b or Mistral Medium better for coding?
They score almost the same on coding (33.8 vs 34.2); test both on your own repository before choosing.
How many benchmarks do C4ai Aya Expanse 8b and Mistral Medium share?
15 benchmarks have published results for both models. C4ai Aya Expanse 8b has 15 scored results on Noometry and Mistral Medium has 36.