Model comparison
C4ai Aya Expanse 8b vs Sonar
Sonar is the stronger model overall, scoring 37.8 to 34.3 on the Noometry Index.
Last verified . 0 shared benchmarks.
Cohere
PerplexitySummary
- The widest gap is in writing & preference, where Sonar leads 52.6 to 39.2.
- Sonar accepts more context: 128K tokens versus 8K.
- C4ai Aya Expanse 8b has downloadable open weights; the other is API-only.
Side by side
| C4ai Aya Expanse 8b | Sonar | |
|---|---|---|
| Provider | Cohere | Perplexity |
| Noometry Index | 34.3 | 37.8 |
| Released | 2024-10-24 | 2024-01-01 |
| Weights | Open | Proprietary |
| Context window | 8K | 128K |
| Max output | 4K | 4K |
| Input $ / M tokens | — | $1 |
| Output $ / M tokens | — | $1 |
| Results tracked | 15 | 7 |
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Category by category
Coding Sonar leads
C4ai Aya Expanse 8b: 33.2 (#252), Sonar: 35.1 (#217)
| Benchmark | C4ai Aya Expanse 8b | Sonar |
|---|---|---|
| LiveBench Coding | — | 35.1% |
| LMArena Coding | 1161 | — |
Reasoning C4ai Aya Expanse 8b leads
C4ai Aya Expanse 8b: 21.4 (#198), Sonar: 20.3 (#221)
| Benchmark | C4ai Aya Expanse 8b | Sonar |
|---|---|---|
| LiveBench Reasoning | — | 46.3% |
| LMArena Hard Prompts | 1156 | — |
| LiveBench Data Analysis | — | 37.9% |
| LiveBench | — | 46.9% |
Math Too close to call
C4ai Aya Expanse 8b: 30.8 (#204), Sonar: 31.3 (#197)
| Benchmark | C4ai Aya Expanse 8b | Sonar |
|---|---|---|
| LiveBench Math | — | 41.6% |
| LMArena Math | 1168 | — |
Knowledge Not comparable
C4ai Aya Expanse 8b: 33.0 (#197), Sonar: —
| Benchmark | C4ai Aya Expanse 8b | Sonar |
|---|---|---|
| Vectara Hallucination Rate | 9.5% | — |
| LMArena Expert | 1153 | — |
Multilingual Not comparable
C4ai Aya Expanse 8b: 36.3 (#237), Sonar: —
| Benchmark | C4ai Aya Expanse 8b | Sonar |
|---|---|---|
| LMArena Non-English | 1180 | — |
| LMArena Chinese | 1181 | — |
| LMArena German | 1188 | — |
| LMArena Japanese | 1120 | — |
| LMArena Russian | 1197 | — |
Instruction Following Sonar leads
C4ai Aya Expanse 8b: 60.4 (#248), Sonar: 71.5 (#146)
| Benchmark | C4ai Aya Expanse 8b | Sonar |
|---|---|---|
| LiveBench Instruction Following | — | 76.2% |
| LMArena Instruction Following | 1155 | — |
Long Context Not comparable
C4ai Aya Expanse 8b: 36.1 (#231), Sonar: —
| Benchmark | C4ai Aya Expanse 8b | Sonar |
|---|---|---|
| LMArena Longer Query | 1192 | — |
Writing & Preference Sonar leads
C4ai Aya Expanse 8b: 39.2 (#245), Sonar: 52.6 (#166)
| Benchmark | C4ai Aya Expanse 8b | Sonar |
|---|---|---|
| LMArena Text | 1185 | — |
| LMArena Creative Writing | 1168 | — |
| LMArena Multi-Turn | 1160 | — |
| LiveBench Language | — | 44.1% |
Frequently asked questions
Is C4ai Aya Expanse 8b better than Sonar?
Sonar is the stronger model overall, scoring 37.8 to 34.3 on the Noometry Index.
Is C4ai Aya Expanse 8b or Sonar better for coding?
Sonar scores higher on coding benchmarks: 35.1 versus 33.2 in the Noometry coding category.
Which has the bigger context window?
Sonar does, with 128K tokens against 8K.
How many benchmarks do C4ai Aya Expanse 8b and Sonar share?
0 benchmarks have published results for both models. C4ai Aya Expanse 8b has 15 scored results on Noometry and Sonar has 7.