Nex-N2.5-Mini vs Solar Mini 4
Nex-N2.5-Mini costs 2.0x less per output token than Solar Mini 4 ($0.10 vs $0.20 per million). Updated October 22, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $0.10
- Coding
- No data
- Overall
- No data
- Output $/M
- $0.20
Nex-N2.5-Mini or Solar Mini 4: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick Nex-N2.5-Mini for output tokens 2.0x cheaper ($0.10 vs $0.20 per million).
No benchmark has tested both yet. Nex-N2.5-Mini has none yet; Solar Mini 4 on SciCode, AA Intelligence Index and Humanity's Last Exam (Artificial Analysis run). Compare them on price and context instead.
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
No call
Only Solar Mini 4 has a Design Arena: websites result, 1159.
Directional only
Long documents
Listed context window
Solar Mini 4
Solar Mini 4 takes 524K tokens against 262K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Nex-N2.5-Mini
Nex-N2.5-Mini $0.0001, Solar Mini 4 $0.0001 per turn.
List prices
At a glance
- Coding index
- Nex-N2.5-Mini not benchmarked, Solar Mini 4 not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- Nex-N2.5-Mini $0.10 against Solar Mini 4 $0.20 per million output tokens, 2.0x apart.
- Context window
- Nex-N2.5-Mini takes 262K tokens, Solar Mini 4 524K.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
CodingDirectional onlySix of these boards feed the Vibe Coding Index1 board measured
| Benchmark | Nex-N2.5-Mini | Solar Mini 4 | Leader |
|---|---|---|---|
| SciCode | Not measured | 47.6% | Only Solar Mini 4 measured |
| Neither model has a result on the other 38 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Nex-N2.5-Mini | 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 | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Nex-N2.5-Mini | 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 21 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index4 boards measured
| Benchmark | Nex-N2.5-Mini | Solar Mini 4 | Leader |
|---|---|---|---|
| Design Arena: websites | Not measured | 1159 | Only Solar Mini 4 measured |
| Design Arena: UI components | Not measured | 1074 | Only Solar Mini 4 measured |
| Design Arena: game dev | Not measured | 1105 | Only Solar Mini 4 measured |
| Design Arena: all code categories | Not measured | 1149 | Only Solar Mini 4 measured |
| Neither model has a result on the other 5 boards here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Nex-N2.5-Mini | 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 | |||
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
Nex-N2.5-Mini costs less
Repository review
50K input + 3K output tokens
Nex-N2.5-Mini costs less
Agent loop
200K input + 10K output tokens
Nex-N2.5-Mini 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 | Nex AGI Nex-N2.5-Mini | Upstage Solar Mini 4 |
|---|---|---|
| Maker | Nex AGI | Upstage |
| Weights | Open weights | No public weights listed |
| Released | September 8, 2026 | September 23, 2026 |
| Context window | 262K | 524K |
| Input $/Mtok | $0.025 | $0.05 |
| Output $/Mtok | $0.10 | $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 Nex-N2.5-Mini better than Solar Mini 4 for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Nex-N2.5-Mini for output tokens 2.0x cheaper ($0.10 vs $0.20 per million).
Which is cheaper, Nex-N2.5-Mini or Solar Mini 4?
Nex-N2.5-Mini costs $0.025 per million input tokens and $0.10 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, Nex-N2.5-Mini or Solar Mini 4?
Solar Mini 4, with 524K tokens against 262K.
Has any benchmark tested both Nex-N2.5-Mini and Solar Mini 4?
No benchmark has tested both yet. Nex-N2.5-Mini has none yet; Solar Mini 4 on SciCode, AA Intelligence Index and Humanity's Last Exam (Artificial Analysis run). Compare them on price and context instead. Data as of October 22, 2026.