Model comparison
Qwen3.5-9B vs Solar Pro4
Solar Pro4 is the stronger model overall, scoring 42.1 to 33.8 on the Noometry Index. Qwen3.5-9B costs 4.7× less per token, which makes it the better buy when Solar Pro4's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Alibaba (Qwen)
UpstageSummary
- The widest gap is in knowledge, where Qwen3.5-9B leads 46.0 to 39.8.
- Qwen3.5-9B is cheaper at $0.10 / $0.15 per million input/output tokens, against $0.30 / $1.20 for Solar Pro4.
- Solar Pro4 accepts more context: 524K tokens versus 262K.
- Qwen3.5-9B has downloadable open weights; the other is API-only.
Side by side
| Qwen3.5-9B | Solar Pro4 | |
|---|---|---|
| Provider | Alibaba (Qwen) | Upstage |
| Noometry Index | 33.8 | 42.1 |
| Released | 2026-02-23 | 2026-08-06 |
| Weights | Open | Proprietary |
| Context window | 262K | 524K |
| Max output | 66K | 131K |
| Input $ / M tokens | $0.10 | $0.30 |
| Output $ / M tokens | $0.15 | $1.20 |
| Results tracked | 10 | 18 |
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Category by category
Coding Solar Pro4 leads
Qwen3.5-9B: 35.9 (#217), Solar Pro4: 40.1 (#149)
| Benchmark | Qwen3.5-9B | Solar Pro4 |
|---|---|---|
| LMArena WebDev | — | 1371 |
| SciCode | 27.5% | — |
| LMArena Coding | — | 1437 |
Agentic & Tool Use Not comparable
Qwen3.5-9B: 14.5 (#151), Solar Pro4: —
| Benchmark | Qwen3.5-9B | Solar Pro4 |
|---|---|---|
| Terminal-Bench | 9.2% | — |
Reasoning Solar Pro4 leads
Qwen3.5-9B: 23.1 (#182), Solar Pro4: 28.5 (#104)
| Benchmark | Qwen3.5-9B | Solar Pro4 |
|---|---|---|
| CritPt | 0.3% | — |
| Chess Puzzles | 12% | — |
| LMArena Hard Prompts | — | 1399 |
| DTBench | 71.2% | — |
| LMCA | 24.5% | — |
| Epoch Capabilities Index | 139.46 | — |
Math Solar Pro4 leads
Qwen3.5-9B: 34.8 (#192), Solar Pro4: 38.8 (#128)
| Benchmark | Qwen3.5-9B | Solar Pro4 |
|---|---|---|
| MathArena Final-Answer Competitions | 48.5% | — |
| OTIS Mock AIME 2024-2025 | 61.7% | — |
| LMArena Math | — | 1416 |
Knowledge Qwen3.5-9B leads
Qwen3.5-9B: 46.0 (#84), Solar Pro4: 39.8 (#129)
| Benchmark | Qwen3.5-9B | Solar Pro4 |
|---|---|---|
| GPQA Diamond | 79% | — |
| LMArena Expert | — | 1427 |
Multilingual Not comparable
Qwen3.5-9B: —, Solar Pro4: 48.7 (#139)
| Benchmark | Qwen3.5-9B | Solar Pro4 |
|---|---|---|
| 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 Not comparable
Qwen3.5-9B: —, Solar Pro4: 72.7 (#132)
| Benchmark | Qwen3.5-9B | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | — | 1377 |
Long Context Not comparable
Qwen3.5-9B: —, Solar Pro4: 42.1 (#130)
| Benchmark | Qwen3.5-9B | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | — | 1381 |
Writing & Preference Not comparable
Qwen3.5-9B: —, Solar Pro4: 56.5 (#138)
| Benchmark | Qwen3.5-9B | Solar Pro4 |
|---|---|---|
| LMArena Text | — | 1386 |
| LMArena Creative Writing | — | 1316 |
| LMArena Multi-Turn | — | 1385 |
Frequently asked questions
Is Qwen3.5-9B better than Solar Pro4?
Solar Pro4 is the stronger model overall, scoring 42.1 to 33.8 on the Noometry Index. Qwen3.5-9B costs 4.7× less per token, which makes it the better buy when Solar Pro4's lead doesn't matter for your workload.
Which is cheaper, Qwen3.5-9B or Solar Pro4?
Qwen3.5-9B is cheaper. It lists at $0.10 per million input tokens and $0.15 per million output tokens; Solar Pro4 lists at $0.30 and $1.20.
Is Qwen3.5-9B or Solar Pro4 better for coding?
Solar Pro4 scores higher on coding benchmarks: 40.1 versus 35.9 in the Noometry coding category.
Which has the bigger context window?
Solar Pro4 does, with 524K tokens against 262K.
How many benchmarks do Qwen3.5-9B and Solar Pro4 share?
0 benchmarks have published results for both models. Qwen3.5-9B has 10 scored results on Noometry and Solar Pro4 has 18.