Upstage
Solar Mini 4
Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window.
At a glance
- Input / 1M
- $0.05
- Output / 1M
- $0.20
- Context
- 524K
- Max output
- 131K
- Intelligence
- 24.1
- Released
- Sep 2026
Pricing
Solar Mini 4 API pricing
Per-token rates, plus what common tasks actually cost.
| Input tokensPer 1M tokens | $0.05 |
|---|---|
| Output tokensPer 1M tokens | $0.20 |
| Cached input (read)Per 1M tokens | $0.01 |
| Cache writePer 1M tokens | Not available |
Chat message
2K in, 500 out
$0.20
per 1,000 requests
Coding task
30K in, 4K out
$2.30
per 1,000 requests
Long document summary
150K in, 2K out
$7.90
per 1,000 requests
Benchmarks
Solar Mini 4 benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
24.1
Coding index
Not available
Agentic index
Not available
Specs
Context window and capabilities
What it can read, what it can write, and which API features it supports.
- Context window
- 524K tokens
- Max output
- 131K tokens
- Input types
- Text
- Output types
- Text
- Reasoning effort
- Max, Extra high, High, Medium, Low, Minimal, None
- Release date
- September 23, 2026
- Tool calling
- Structured outputs
- JSON mode
- Reasoning
- Temperature
- Stop sequences
- Deterministic seed
- Verbosity control
Compare
Solar Mini 4 vs other models
See how Solar Mini 4 stacks up head to head on price, benchmarks, and features.
Solar Mini 4 vs DeepSeek V4 Flash 0423
Upstage vs DeepSeek
See comparisonSolar Mini 4 vs Hy3
Upstage vs Tencent
See comparisonSolar Mini 4 vs Muse Spark 1.3 Contributor
Upstage vs Meta
See comparisonSolar Mini 4 vs MiMo-V2.5
Upstage vs Xiaomi
See comparisonSolar Mini 4 vs DeepSeek V4 Pro 0423
Upstage vs DeepSeek
See comparisonSolar Mini 4 vs Solar Pro 4
Upstage vs Upstage
See comparisonAlternatives
Solar Mini 4 alternatives
Similar models worth considering, and where each one has the edge.
DeepSeek
DeepSeek V4 Pro 0423
Upstage
Solar Pro 4
Xiaomi
MiMo-V2.5-Pro
Want to learn about other models? Browse all models
FAQ
Frequently asked questions
How much does Solar Mini 4 cost?
Solar Mini 4 costs $0.05 per 1M input tokens and $0.20 per 1M output tokens through the API. A typical chat message costs about $0.20 per 1,000 messages.
What is the context window of Solar Mini 4?
Solar Mini 4 accepts up to 524K tokens of input and can write up to 131K tokens in a single response.
What is the best alternative to Solar Mini 4?
DeepSeek V4 Pro 0423 from DeepSeek is a strong alternative. It offers: higher intelligence score, larger 1.05m context.
Can I use Solar Mini 4 alongside other models?
Yes. Shortcut Chat sends one prompt to Solar Mini 4 and any other models you pick at the same time, so you can compare answers side by side.
Try Solar Mini 4 next to every other model.
Use Solar Mini 4 alongside all the other models. Use one at a time, or multiple together. Get the best answer from every AI.