Upstage: Solar Mini 4✓ Catalog verified
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. It is built for agentic use cases where response...
Overview
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. It is built for agentic use cases where response...
Access: available through the official Upstage API. Context window: 524K.
Specifications
| API identifier | upstage/solar-mini4 |
| Provider | Upstage |
| Model type | Text LLM |
| Context window | 524K catalog |
| Input modalities | text |
| Output modalities | text |
| Released | Sep 23, 2026 |
| Moderated | No |
| Architecture modality | text->text |
Pricing
Live pricing components for upstage/solar-mini4 as published in the catalog.
| Pricing component | Raw unit price | Normalized | Unit |
|---|---|---|---|
| Prompt tokens | $5e-8 | $0.05 / 1M | Per input token |
| Completion tokens | $2e-7 | $0.20 / 1M | Per output token |
| Request fee | N/A | N/A | Per request |
| Image fee | N/A | N/A | Per image unit |
| Web search fee | N/A | N/A | Per search request |
Cost calculator
Estimate monthly spend from your own token volumes.
Estimated Total Cost
$0.07Calculated from current list pricing in the ModelsAtlas catalog.Capabilities
| Capability | Status | What it means |
|---|---|---|
| Visual Understanding | Not advertised | Image and document analysis support |
| Audio Processing | Not advertised | Speech and voice aligned flows |
| Tool Calling | ✓ Supported | Supports tools / function calling |
| Self-Hosting | Not advertised | Deploy outside managed APIs |
Capability signals
Directional signals derived from model metadata and capability tags — not official benchmark submissions.
Quick start
Call Upstage: Solar Mini 4 through an OpenAI-compatible client.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_API_KEY"
)
response = client.chat.completions.create(
model="upstage/solar-mini4",
messages=[{"role": "user", "content": "Explain quantum physics."}]
)
print(response.choices[0].message.content)Alternatives
Closest models by context window from a different provider.
| Model | Provider | Context | Input /1M | Actions |
|---|---|---|---|---|
| MiniMax: MiniMax M3 (batch) | Minimax | 524K | $0.30 | View → |
| Thinking Machines: Inkling (batch) | Thinkingmachines | 524K | $1.00 | View → |
Sources & attribution
Pricing and metadata are maintained in the ModelsAtlas catalog.
Frequently asked questions
How much does Upstage: Solar Mini 4 cost?
$0.05 per 1M input tokens and $0.20 per 1M output tokens on the official Upstage API.
What is the context window of Upstage: Solar Mini 4?
Upstage: Solar Mini 4 supports up to 524K tokens of context.
Does Upstage: Solar Mini 4 support tool / function calling?
Yes, Upstage: Solar Mini 4 supports tool / function calling — you can register tools and the model will emit structured tool calls.
How do I access Upstage: Solar Mini 4?
Use the official Upstage API with the model id `upstage/solar-mini4`. See the Quick start section above for code examples.