# Qwen3.5 27B vs Solar Pro4

> Qwen3.5 27B and Solar Pro4 score almost the same on the Noometry Index (41.4 vs 41.5), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/qwen3-5-27b-vs-solar-pro4
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Qwen3.5 27B scores higher in 5 categories and Solar Pro4 in 3 categories; 5 gaps are clear of the uncertainty.
- Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $0.30 / $2.40 for Qwen3.5 27B.
- Solar Pro4 accepts more context: 524K tokens versus 262K.
- Qwen3.5 27B has downloadable open weights; the other is API-only.

## Snapshot

| | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| Provider | Alibaba (Qwen) | Upstage |
| Noometry Index | 41.4 | 41.5 |
| Rank | 127 | 123 |
| Context | 262K | 524K |
| Input $/M | $0.30 | $0.30 |
| Output $/M | $2.40 | $1.20 |
| Weights | Open | Proprietary |

## Coding

- Qwen3.5 27B: 38.6 (#159)
- Solar Pro4: 39.9 (#135)

| Benchmark | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| LMArena WebDev | 1357 | 1371 |
| LMArena Coding | 1427 | 1439 |
| WeirdML | 39.5% | — |
| ALE-Bench | 349.45 | — |

## Agentic & Tool Use

- Qwen3.5 27B: —
- Solar Pro4: —

| Benchmark | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| Vending-Bench 2 | 201.98 | — |

## Reasoning

- Qwen3.5 27B: 26.6 (#116)
- Solar Pro4: 27.3 (#107)

| Benchmark | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1414 | 1398 |
| NYT Connections (extended) | 47.9% | — |
| Thematic Generalization | 45.5% | — |
| DTBench | 82.4% | — |
| LMCA | 34% | — |

## Math

- Qwen3.5 27B: 36.8 (#103)
- Solar Pro4: 36.1 (#129)

| Benchmark | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| LMArena Math | 1428 | 1418 |
| MathArena Final-Answer Competitions | 56.7% | — |

## Knowledge

- Qwen3.5 27B: 37.4 (#149)
- Solar Pro4: 39.0 (#128)

| Benchmark | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1428 | 1421 |
| Vectara Hallucination Rate | 12.1% | — |

## Multimodal

- Qwen3.5 27B: 38.7 (#56)
- Solar Pro4: —

| Benchmark | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1240 | — |

## Multilingual

- Qwen3.5 27B: 51.0 (#112)
- Solar Pro4: 49.0 (#134)

| Benchmark | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1390 | 1362 |
| LMArena Chinese | 1478 | 1417 |
| LMArena French | 1409 | 1403 |
| LMArena German | 1393 | 1351 |
| LMArena Japanese | 1345 | 1300 |
| LMArena Korean | 1359 | 1383 |
| LMArena Russian | 1389 | 1360 |
| LMArena Spanish | 1408 | 1408 |

## Instruction Following

- Qwen3.5 27B: 73.7 (#114)
- Solar Pro4: 72.8 (#128)

| Benchmark | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1393 | 1376 |

## Long Context

- Qwen3.5 27B: 43.1 (#103)
- Solar Pro4: 42.0 (#125)

| Benchmark | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1413 | 1379 |

## Writing & Preference

- Qwen3.5 27B: 59.5 (#106)
- Solar Pro4: 56.7 (#133)

| Benchmark | Qwen3.5 27B | Solar Pro4 |
|---|---|---|
| LMArena Text | 1409 | 1386 |
| LMArena Creative Writing | 1362 | 1313 |
| LMArena Multi-Turn | 1410 | 1391 |

## FAQ

### Is Qwen3.5 27B better than Solar Pro4?

Qwen3.5 27B and Solar Pro4 score almost the same on the Noometry Index (41.4 vs 41.5), so choose on price, context window or the category you care about most.

### Which is cheaper, Qwen3.5 27B or Solar Pro4?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Qwen3.5 27B lists at $0.30 and $2.40.

### Is Qwen3.5 27B or Solar Pro4 better for coding?

Solar Pro4 scores higher on coding benchmarks: 39.9 versus 38.6 in the Noometry coding category.

### Which has the bigger context window?

Solar Pro4 does, with 524K tokens against 262K.

### How many benchmarks do Qwen3.5 27B and Solar Pro4 share?

18 benchmarks have published results for both models. Qwen3.5 27B has 28 scored results on Noometry and Solar Pro4 has 18.