U
Upstage: Syn Pro
syn-pro:free
65.5K context
Released Oct 21, 2025Updated Nov 7, 2026
Syn Pro is a 31B parameter Japanese focused language model co-developed by Upstage and Karakuri for enterprise use. It supports Japanese, English and Korean and was certified by Japan's METI as a domestic foundation model.
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
Compatible endpoints openaiVendor Upstage
Uptime
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Frequently asked questions
Use syn-pro in
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Base URL
https://api.unorouter.com/v1Call syn-pro: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": "syn-pro:free",
"messages": [{"role": "user", "content": "Hello!"}]
}'Available endpoints
openai
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