# Solar Pro4 vs Sonar

> Solar Pro4 is the stronger model overall, scoring 42.1 to 38.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/solar-pro4-vs-sonar
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where Solar Pro4 leads 28.5 to 21.1.
- Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $1 / $1 for Sonar.
- Solar Pro4 accepts more context: 524K tokens versus 128K.

## Snapshot

| | Solar Pro4 | Sonar |
|---|---|---|
| Provider | Upstage | Perplexity |
| Noometry Index | 42.1 | 38.5 |
| Rank | 121 | 187 |
| Context | 524K | 128K |
| Input $/M | $0.30 | $1 |
| Output $/M | $1.20 | $1 |
| Weights | Proprietary | Proprietary |

## Coding

- Solar Pro4: 40.1 (#149)
- Sonar: 35.7 (#221)

| Benchmark | Solar Pro4 | Sonar |
|---|---|---|
| LMArena WebDev | 1371 | — |
| LiveBench Coding | — | 35.1% |
| LMArena Coding | 1437 | — |

## Reasoning

- Solar Pro4: 28.5 (#104)
- Sonar: 21.1 (#227)

| Benchmark | Solar Pro4 | Sonar |
|---|---|---|
| LiveBench Reasoning | — | 46.3% |
| LMArena Hard Prompts | 1399 | — |
| LiveBench Data Analysis | — | 37.9% |
| LiveBench | — | 46.9% |

## Math

- Solar Pro4: 38.8 (#128)
- Sonar: 33.7 (#200)

| Benchmark | Solar Pro4 | Sonar |
|---|---|---|
| LiveBench Math | — | 41.6% |
| LMArena Math | 1416 | — |

## Knowledge

- Solar Pro4: 39.8 (#129)
- Sonar: —

| Benchmark | Solar Pro4 | Sonar |
|---|---|---|
| LMArena Expert | 1427 | — |

## Multilingual

- Solar Pro4: 48.7 (#139)
- Sonar: —

| Benchmark | Solar Pro4 | Sonar |
|---|---|---|
| LMArena Non-English | 1361 | — |
| LMArena Chinese | 1415 | — |
| LMArena French | 1397 | — |
| LMArena German | 1364 | — |
| LMArena Japanese | 1309 | — |
| LMArena Korean | 1382 | — |
| LMArena Russian | 1360 | — |
| LMArena Spanish | 1401 | — |

## Instruction Following

- Solar Pro4: 72.7 (#132)
- Sonar: 71.4 (#150)

| Benchmark | Solar Pro4 | Sonar |
|---|---|---|
| LiveBench Instruction Following | — | 76.2% |
| LMArena Instruction Following | 1377 | — |

## Long Context

- Solar Pro4: 42.1 (#130)
- Sonar: —

| Benchmark | Solar Pro4 | Sonar |
|---|---|---|
| LMArena Longer Query | 1381 | — |

## Writing & Preference

- Solar Pro4: 56.5 (#138)
- Sonar: 52.6 (#167)

| Benchmark | Solar Pro4 | Sonar |
|---|---|---|
| LMArena Text | 1386 | — |
| LMArena Creative Writing | 1316 | — |
| LMArena Multi-Turn | 1385 | — |
| LiveBench Language | — | 44.1% |

## FAQ

### Is Solar Pro4 better than Sonar?

Solar Pro4 is the stronger model overall, scoring 42.1 to 38.5 on the Noometry Index.

### Which is cheaper, Solar Pro4 or Sonar?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Sonar lists at $1 and $1.

### Is Solar Pro4 or Sonar better for coding?

Solar Pro4 scores higher on coding benchmarks: 40.1 versus 35.7 in the Noometry coding category.

### Which has the bigger context window?

Solar Pro4 does, with 524K tokens against 128K.

### How many benchmarks do Solar Pro4 and Sonar share?

0 benchmarks have published results for both models. Solar Pro4 has 18 scored results on Noometry and Sonar has 7.