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.
Model by Upstage
Install
Pick your client. Read the repository before you give any tool access to your data.
{
"model": "upstage/solar-mini4",
"baseURL": "https://openrouter.ai/api/v1"
}OpenAI-compatible API: point any OpenAI SDK at the base URL and use this model id.
Settings it needs
OPENROUTER_API_KEYrequiredsecret
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About
Use cases: model-inference
Reviews
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Price and limits
| Variant | Input $/M tokens | Output $/M tokens | Cached input $/M |
|---|---|---|---|
| Standard | $0.05 | $0.2 | $0.005 |
Price as of Oct 26, 2026 from OpenRouter. Prices change often; check before you rely on one.
- Provider
- Upstage
- Model id
upstage/solar-mini4- Context window
- 524,288 tokens (524K)
- Max output
- 131,072 tokens
- Input
- text
- Output
- text
- Tool calling
- Yes
- Structured outputs
- Yes
- Reasoning
- Yes
- Weights
- Closed
- Released
- Sep 23, 2026
Details
- Auth
- API key
- License
- Proprietary
- First seen
- Oct 24, 2026
- Last checked
- Oct 26, 2026
- Source
- OpenRouter
More from Upstage
- 0.582score
Solar Pro 3
Upstage
Solar Pro 3 is Upstage's powerful Mixture-of-Experts (MoE) language model.
ModelAFreshness: A$0.15 / $0.6131K ctx - 0.582score
Solar Pro 4
Upstage
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window.
ModelAFreshness: A$0.15 / $0.6524K ctx
Cite this page
Solar Mini 4: price, context window, tool use. Agent Mart. https://agentmart.dev/models/upstage-solar-mini4 (last updated 2026-10-26)