AI model comparison
Solar Mini 4 vs Solar Pro 4
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
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.
- Input / 1M
- $0.05
- Output / 1M
- $0.20
- Context
- 524K
Upstage
Solar Pro 4
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window.
- Input / 1M
- $0.09
- Output / 1M
- $0.36
- Context
- 524K
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Solar Mini 4
1.8x cheaper for a typical chat
Higher intelligence score
Solar Pro 4
28.2 vs 24.1 on Artificial Analysis
Larger context window
Tie
524K vs 524K tokens
Newer release
Solar Mini 4
Released September 23, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Coding index
Agentic index
Pricing
Solar Mini 4 vs Solar Pro 4 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | ||
|---|---|---|
| Input tokensPer 1M tokens | $0.05 | $0.09 |
| Output tokensPer 1M tokens | $0.20 | $0.36 |
| Cached input (read)Per 1M tokens | $0.01 | $0.02 |
| Cache writePer 1M tokens | Not available | Not available |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
Coding task
30K in, 4K out
Long document summary
150K in, 2K out
Specs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | ||
|---|---|---|
| Context window | 524K tokens | 524K tokens |
| Max output | 131K tokens | 131K tokens |
| Input types | Text | Text |
| Output types | Text | Text |
| Reasoning effort levels | Max, Extra high, High, Medium, Low, Minimal, None | Max, Extra high, High, Medium, Low, Minimal, None |
| Default reasoning effort | Medium | Medium |
| Release date | September 23, 2026 | August 10, 2026 |
Features
Supported features
API features available for each model.
| Metric | ||
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Supported | Supported |
| Stop sequences | Not supported | Not supported |
| Deterministic seed | Not supported | Not supported |
| Verbosity control | Not supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
- Solar Mini 4 vs DeepSeek V4 Flash 0423
- Solar Mini 4 vs Hy3
- Solar Mini 4 vs Muse Spark 1.3 Contributor
- Solar Mini 4 vs MiMo-V2.5
- Solar Mini 4 vs DeepSeek V4 Pro 0423
- Solar Mini 4 vs Qwen3.7 Flash
- Solar Mini 4 vs DeepSeek V3.2
- Solar Mini 4 vs MiMo-V2.5-Pro
- Solar Mini 4 vs Ling 3.0 Flash
- Solar Mini 4 vs MiniMax M2.7
- Solar Mini 4 vs Ling 3.0 Flash VL
- Solar Mini 4 vs Ling 3.0 Flash Fin
- Solar Pro 4 vs MiMo-V2.6-Flash
- Solar Pro 4 vs GPT-6 Luna
- Solar Pro 4 vs DeepSeek V4 Flash 0731
- Solar Pro 4 vs DeepSeek V4 Flash 0423
- Solar Pro 4 vs Hy3
- Solar Pro 4 vs Muse Spark 1.3 Contributor
- Solar Pro 4 vs MiniMax M3
- Solar Pro 4 vs MiMo-V2.5
- Solar Pro 4 vs DeepSeek V4 Pro 0423
- Solar Pro 4 vs MiMo-V2.5-Pro
- Solar Pro 4 vs Ling 3.0 Flash VL
- Solar Pro 4 vs Ling 3.0 Flash Fin
Our take
Solar Mini 4 is 1.8x cheaper for a typical chat. Solar Pro 4 scores higher on the Artificial Analysis Intelligence Index (28.2 vs 24.1). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is Solar Mini 4 or Solar Pro 4 cheaper?
Solar Mini 4 is cheaper for a typical chat (2K input tokens and 500 output tokens). Solar Mini 4 costs $0.05 per 1M input tokens and $0.20 per 1M output tokens, while Solar Pro 4 costs $0.09 per 1M input tokens and $0.36 per 1M output tokens.
Which has a bigger context window, Solar Mini 4 or Solar Pro 4?
Solar Mini 4 supports up to 524K tokens of context, compared with 524K for Solar Pro 4.
Is Solar Mini 4 smarter than Solar Pro 4?
On the Artificial Analysis Intelligence Index, Solar Mini 4 scores 24.1 and Solar Pro 4 scores 28.2, putting Solar Pro 4 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use Solar Mini 4 and Solar Pro 4 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Solar Mini 4 and Solar Pro 4 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Solar Mini 4 and Solar Pro 4 at the same time. Compare the answers side by side and keep the best one.