Codestral 2508 vs Solar Mini 4
Updated October 21, 2026. 3 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Neither model has a coding score yet, so the two cannot be ranked on coding.
Codestral 2508 has the edge where what matters is Design Arena: websites or Design Arena: game dev, where it leads.
- Shared results
- 3
- Codestral 2508 only
- 4
- Solar Mini 4 only
- 4
- Like-for-like categories
- 1 of 9
Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.
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
Solar Mini 4
Solar Mini 4 leads, 1160 against 1013.
Same board, both measured
Long documents
Listed context window
Solar Mini 4
Solar Mini 4 takes 524K tokens against 256K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Solar Mini 4
Codestral 2508 $0.0008, Solar Mini 4 $0.0001 per turn.
List prices
At a glance
- Coding index
- Codestral 2508 not benchmarked, Solar Mini 4 not benchmarked.
- Widest category
- Web design, 18.2 points apart on average over 3 shared benchmarks.
- Widest single gap
- Design Arena: websites: Codestral 2508 1013 against Solar Mini 4 1160, 18.4 points apart on a 0 to 100 scale.
- Output price
- Codestral 2508 $0.90 against Solar Mini 4 $0.20 per million output tokens, 4.5x apart.
- Context window
- Codestral 2508 takes 256K 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 | Codestral 2508 | Bars | Solar Mini 4 | Ties |
|---|---|---|---|---|
| Web design | 0 | 3 | ||
| All shared boards | 0 | 3 |
CodingDirectional onlySix of these boards feed the Vibe Coding Index2 boards, none shared
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | Codestral 2508 | 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 | Codestral 2508 | Solar Mini 4 | Leader |
|---|---|---|---|
| Neither model has a result on 39 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | Codestral 2508 | 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 20 boards here | |||
MathNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Codestral 2508 | Solar Mini 4 | 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 | Codestral 2508 | Solar Mini 4 | Leader |
|---|---|---|---|
| Neither model has a result on 17 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index03
| Benchmark | Codestral 2508 | Solar Mini 4 | Leader |
|---|---|---|---|
| Design Arena: websites | 1013 | 1160 | Solar Mini 4 |
| Design Arena: UI components | 1017 | Not measured | Only Codestral 2508 measured |
| Design Arena: game dev | 968 | 1113 | Solar Mini 4 |
| Design Arena: data viz | 1017 | Not measured | Only Codestral 2508 measured |
| Design Arena: 3D | 1020 | Not measured | Only Codestral 2508 measured |
| Design Arena: all code categories | 1007 | 1153 | Solar Mini 4 |
| Neither model has a result on the other 3 boards here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | Codestral 2508 | 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 45 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Codestral 2508 | 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 | Mistral Codestral 2508 | Upstage Solar Mini 4 |
|---|---|---|
| Maker | Mistral AI | Upstage |
| Weights | No public weights listed | No public weights listed |
| Released | August 1, 2025 | September 23, 2026 |
| Context window | 256K | 524K |
| Input $/Mtok | $0.30 | $0.05 |
| Output $/Mtok | $0.90 | $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 Codestral 2508 better than Solar Mini 4 for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Codestral 2508 has the edge where what matters is Design Arena: websites or Design Arena: game dev, where it leads.
Which is cheaper, Codestral 2508 or Solar Mini 4?
Codestral 2508 costs $0.30 per million input tokens and $0.90 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, Codestral 2508 or Solar Mini 4?
Solar Mini 4, with 524K tokens against 256K.
How many benchmarks is the Codestral 2508 vs Solar Mini 4 comparison based on?
3 benchmarks have a result for both models as of October 21, 2026. Codestral 2508'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.