Qwen3.5 Plus 2026-02-15 vs Solar Mini 4
Solar Mini 4 costs 7.8x less per output token than Qwen3.5 Plus 2026-02-15 ($0.20 vs $1.56 per million). Updated October 22, 2026; 4 benchmarks have a result for both.
Qwen3.5 Plus 2026-02-15 or Solar Mini 4: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick Qwen3.5 Plus 2026-02-15 for a larger context window (1M against 524K tokens).
- Shared results
- 4
- Qwen3.5 Plus 2026-02-15 only
- 4
- Solar Mini 4 only
- 4
- Like-for-like categories
- 1 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
No call
Only Solar Mini 4 has a AA Intelligence Index result, 24.1.
Directional only
Web design
Design Arena: websites
Qwen3.5 Plus 2026-02-15
Qwen3.5 Plus 2026-02-15 leads, 1187 against 1159.
Same board, both measured
Long documents
Listed context window
Qwen3.5 Plus 2026-02-15
Qwen3.5 Plus 2026-02-15 takes 1M tokens against 524K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Solar Mini 4
Qwen3.5 Plus 2026-02-15 $0.0010, Solar Mini 4 $0.0001 per turn.
List prices
At a glance
- Coding index
- Qwen3.5 Plus 2026-02-15 not benchmarked, Solar Mini 4 not benchmarked.
- Widest category
- Web design, 4.6 points apart on average over 4 shared benchmarks.
- Widest single gap
- Design Arena: UI components: Qwen3.5 Plus 2026-02-15 1175 against Solar Mini 4 1073, 12.8 points apart on a 0 to 100 scale.
- Output price
- Qwen3.5 Plus 2026-02-15 $1.56 against Solar Mini 4 $0.20 per million output tokens, 7.8x apart.
- Context window
- Qwen3.5 Plus 2026-02-15 takes 1M tokens, Solar Mini 4 524K.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | Qwen3.5 Plus 2026-02-15 | Bars | Solar Mini 4 | Ties |
|---|---|---|---|---|
| Web design | 3 | 0 | 1 tie | |
| All shared boards | 3 | 0 | 1 tie |
CodingDirectional onlySix of these boards feed the Vibe Coding Index1 board, none shared
| Benchmark | Qwen3.5 Plus 2026-02-15 | Solar Mini 4 | Leader |
|---|---|---|---|
| SciCode | Not measured | 47.6% | Only Solar Mini 4 measured |
| Neither model has a result on the other 42 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | Qwen3.5 Plus 2026-02-15 | Solar Mini 4 | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 24.1 | Only Solar Mini 4 measured |
| Neither model has a result on the other 1 board here | |||
Agentic workNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Qwen3.5 Plus 2026-02-15 | Solar Mini 4 | Leader |
|---|---|---|---|
| Neither model has a result on 42 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | Qwen3.5 Plus 2026-02-15 | Solar Mini 4 | Leader |
|---|---|---|---|
| Humanity's Last Exam (Artificial Analysis run) | Not measured | 25.8% | Only Solar Mini 4 measured |
| Neither model has a result on the other 22 boards here | |||
MathNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Qwen3.5 Plus 2026-02-15 | Solar Mini 4 | Leader |
|---|---|---|---|
| Neither model has a result on 14 boards here | |||
KnowledgeNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Qwen3.5 Plus 2026-02-15 | Solar Mini 4 | Leader |
|---|---|---|---|
| Neither model has a result on 20 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index30
| Benchmark | Qwen3.5 Plus 2026-02-15 | Solar Mini 4 | Leader |
|---|---|---|---|
| Design Arena: websites | 1187 | 1159 | Qwen3.5 Plus 2026-02-15 |
| Design Arena: UI components | 1175 | 1073 | Qwen3.5 Plus 2026-02-15 |
| Design Arena: game dev | 1105 | 1105 | Tie |
| Design Arena: data viz | 1135 | Not measured | Only Qwen3.5 Plus 2026-02-15 measured |
| Design Arena: 3D | 1118 | Not measured | Only Qwen3.5 Plus 2026-02-15 measured |
| Design Arena: all code categories | 1166 | 1149 | Qwen3.5 Plus 2026-02-15 |
| Design Arena: SVG | 1107 | Not measured | Only Qwen3.5 Plus 2026-02-15 measured |
| Design Arena: ASCII art | 1094 | Not measured | Only Qwen3.5 Plus 2026-02-15 measured |
| Neither model has a result on the other 1 board here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | Qwen3.5 Plus 2026-02-15 | Solar Mini 4 | Leader |
|---|---|---|---|
| Long context reasoning (AA-LCR) | Not measured | 83.3% | Only Solar Mini 4 measured |
| Neither model has a result on the other 47 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Qwen3.5 Plus 2026-02-15 | Solar Mini 4 | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Solar Mini 4 costs less
Repository review
50K input + 3K output tokens
Solar Mini 4 costs less
Agent loop
200K input + 10K output tokens
Solar Mini 4 costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Qwen3.5 Plus 2026-02-15 | Upstage Solar Mini 4 |
|---|---|---|
| Maker | Qwen | Upstage |
| Weights | No public weights listed | No public weights listed |
| Released | February 16, 2026 | September 23, 2026 |
| Context window | 1M | 524K |
| Input $/Mtok | $0.26 | $0.05 |
| Output $/Mtok | $1.56 | $0.20 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Qwen3.5 Plus 2026-02-15 better than Solar Mini 4 for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Qwen3.5 Plus 2026-02-15 for a larger context window (1M against 524K tokens).
Which is cheaper, Qwen3.5 Plus 2026-02-15 or Solar Mini 4?
Qwen3.5 Plus 2026-02-15 costs $0.26 per million input tokens and $1.56 per million output tokens; Solar Mini 4 costs $0.05 and $0.20. Cost per solved task is known for neither of them.
Which has the bigger context window, Qwen3.5 Plus 2026-02-15 or Solar Mini 4?
Qwen3.5 Plus 2026-02-15, with 1M tokens against 524K.
How many benchmarks is the Qwen3.5 Plus 2026-02-15 vs Solar Mini 4 comparison based on?
4 benchmarks have a result for both models as of October 22, 2026. Qwen3.5 Plus 2026-02-15's coding index rests on 0 independent benchmarks and Solar Mini 4's on 0. Where only one model has a result, the page says so instead of naming a winner.