Solar Mini 4 vs Solar Pro 3
Solar Mini 4 leads Solar Pro 3 on the Artificial Analysis Intelligence Index, 24.1 to 7.8, and Solar Mini 4 costs 3.0x less per output token ($0.20 vs $0.60 per million). Updated October 22, 2026; 4 benchmarks have a result for both.
Solar Mini 4 or Solar Pro 3: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick Solar Mini 4 for output tokens 3.0x cheaper ($0.20 vs $0.60 per million) and a larger context window (524K against 131K tokens).
- Shared results
- 4
- Solar Mini 4 only
- 3
- Solar Pro 3 only
- 6
- Like-for-like categories
- 4 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
Solar Mini 4
Solar Mini 4 leads, 24.1 against 7.8.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Solar Pro 3 has a AA Agentic Index result, 1.4.
Directional only
Web design
Design Arena: websites
No call
Only Solar Mini 4 has a Design Arena: websites result, 1158.
Directional only
Long documents
Listed context window
Solar Mini 4
Solar Mini 4 takes 524K tokens against 131K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Solar Mini 4
Solar Mini 4 $0.0001, Solar Pro 3 $0.0004 per turn.
List prices
At a glance
- Coding index
- Solar Mini 4 not benchmarked, Solar Pro 3 not benchmarked.
- Widest category
- General, 51.0 points apart on average over 1 shared benchmark.
- Widest single gap
- Long context reasoning (AA-LCR): Solar Mini 4 83.3% against Solar Pro 3 32.3%, 51.0 points apart on a 0 to 100 scale.
- Output price
- Solar Mini 4 $0.20 against Solar Pro 3 $0.60 per million output tokens, 3.0x apart.
- Context window
- Solar Mini 4 takes 524K tokens, Solar Pro 3 131K.
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 | Solar Mini 4 | Bars | Solar Pro 3 | Ties |
|---|---|---|---|---|
| Coding | 1 | 0 | ||
| Intelligence | 1 | 0 | ||
| Reasoning | 1 | 0 | ||
| General | 1 | 0 | ||
| All shared boards | 4 | 0 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index10
| Benchmark | Solar Mini 4 | Solar Pro 3 | Leader |
|---|---|---|---|
| AA Coding Index | Not measured | 16.2 | Only Solar Pro 3 measured |
| SciCode | 47.6% | 25.5% | Solar Mini 4 |
| Terminal-Bench Hard (Artificial Analysis run) | Not measured | 7.6% | Only Solar Pro 3 measured |
| Neither model has a result on the other 36 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Solar Mini 4 | Solar Pro 3 | Leader |
|---|---|---|---|
| AA Intelligence Index | 24.1 | 7.8 | Solar Mini 4 |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
| Benchmark | Solar Mini 4 | Solar Pro 3 | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 1.4 | Only Solar Pro 3 measured |
| τ²-Bench Telecom | Not measured | 86.3% | Only Solar Pro 3 measured |
| Neither model has a result on the other 39 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Solar Mini 4 | Solar Pro 3 | Leader |
|---|---|---|---|
| GPQA Diamond (Artificial Analysis run) | Not measured | 72.4% | Only Solar Pro 3 measured |
| Humanity's Last Exam (Artificial Analysis run) | 25.8% | 10.3% | Solar Mini 4 |
| Neither model has a result on the other 20 boards here | |||
MathNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Solar Mini 4 | Solar Pro 3 | Leader |
|---|---|---|---|
| Neither model has a result on 13 boards here | |||
KnowledgeNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Solar Mini 4 | Solar Pro 3 | Leader |
|---|---|---|---|
| Neither model has a result on 18 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index3 boards, none shared
| Benchmark | Solar Mini 4 | Solar Pro 3 | Leader |
|---|---|---|---|
| Design Arena: websites | 1158 | Not measured | Only Solar Mini 4 measured |
| Design Arena: game dev | 1106 | Not measured | Only Solar Mini 4 measured |
| Design Arena: all code categories | 1150 | Not measured | Only Solar Mini 4 measured |
| Neither model has a result on the other 6 boards here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Solar Mini 4 | Solar Pro 3 | Leader |
|---|---|---|---|
| IFBench | Not measured | 71.2% | Only Solar Pro 3 measured |
| Long context reasoning (AA-LCR) | 83.3% | 32.3% | Solar Mini 4 |
| Neither model has a result on the other 44 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Solar Mini 4 | Solar Pro 3 | 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 | Upstage Solar Mini 4 | Upstage Solar Pro 3 |
|---|---|---|
| Maker | Upstage | Upstage |
| Weights | No public weights listed | No public weights listed |
| Released | September 23, 2026 | January 27, 2026 |
| Context window | 524K | 131K |
| Input $/Mtok | $0.05 | $0.15 |
| Output $/Mtok | $0.20 | $0.60 |
| 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 Solar Mini 4 better than Solar Pro 3 for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Solar Mini 4 for output tokens 3.0x cheaper ($0.20 vs $0.60 per million) and a larger context window (524K against 131K tokens).
Which is cheaper, Solar Mini 4 or Solar Pro 3?
Solar Mini 4 costs $0.05 per million input tokens and $0.20 per million output tokens; Solar Pro 3 costs $0.15 and $0.60. Cost per solved task is known for neither of them.
Which has the bigger context window, Solar Mini 4 or Solar Pro 3?
Solar Mini 4, with 524K tokens against 131K.
How many benchmarks is the Solar Mini 4 vs Solar Pro 3 comparison based on?
4 benchmarks have a result for both models as of October 22, 2026. Solar Mini 4's coding index rests on 0 independent benchmarks and Solar Pro 3's on 0. Where only one model has a result, the page says so instead of naming a winner.