U
Upstage: solar-mini4
solar-mini4:free
524.3K context131.1K outReasoningToolsParallel toolsCacheStructured
Released Sep 23, 2026Updated Oct 25, 2026
Efficient model for low-latency assistance, extraction, and routine automation
Tokenizer Other
Inputs used for the providers' own purposes
At least one provider of this model uses your inputs for its own purposes, for example to train AI models. Do not enter personal data of third parties or sensitive data. You can object to this use at any time in your account settings or via "Manage consents" in the chat.
Read the privacy policyPricing
Input price
$0.00/ 1M tokens
Output price
$0.00/ 1M tokens
Context window 32.8K tokensCompatible endpoints openaiVendor Upstage
Uptime
Performance
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Supported parameters
All providers = every upstream serving this model supports it. Some providers = depends on which upstream handles the request. Default = the value sent when you leave the parameter unset.
| Parameter | Providers | Default |
|---|---|---|
| frequency_penalty | All providers | - |
| include_reasoning | All providers | - |
| max_tokens | All providers | - |
| parallel_tool_calls | All providers | - |
| presence_penalty | All providers | - |
| reasoning | All providers | - |
| reasoning_effort | All providers | - |
| response_format | All providers | - |
| structured_outputs | All providers | - |
| temperature | All providers | - |
| tool_choice | All providers | - |
| tools | All providers | - |
| top_p | All providers | - |
Frequently asked questions
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Base URL
https://api.unorouter.com/v1Call solar-mini4:free from your code
Point any OpenAI-compatible SDK at UnoRouter and request the model by name. Replace YOUR_API_KEY with a real key from your dashboard.
bash
curl https://api.unorouter.com/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "solar-mini4:free",
"messages": [{"role": "user", "content": "Hello!"}]
}'Available endpoints
openai
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