Solar Mini 4
Solar Mini 4 is a language model from Upstage. It is currently free at 1 provider with up to 524K tokens of context.
- Developer
- Upstage
- Context
- 524K tokens
- Type
- Text
- License
- Proprietary
- Free since
- October 5, 2026
Where to use Solar Mini 4 for free
Each row is a separate free endpoint with its own limits.
| Provider | Context | Limit | Card | |
|---|---|---|---|---|
Nous Portal upstage/solar-mini4:free |
524K | The $0 Portal plan includes free models with standard rate limits. Model availability can change. | No | Open |
Quick start
curl https://inference-api.nousresearch.com/v1/chat/completions \
-H "Authorization: Bearer $NOUS_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "upstage/solar-mini4:free",
"messages": [{"role": "user", "content": "Hello!"}]
}'from openai import OpenAI
client = OpenAI(
base_url="https://inference-api.nousresearch.com/v1",
api_key="YOUR_NOUS_API_KEY",
)
reply = client.chat.completions.create(
model="upstage/solar-mini4:free",
messages=[{"role": "user", "content": "Hello!"}],
)
print(reply.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://inference-api.nousresearch.com/v1",
apiKey: process.env.NOUS_API_KEY,
});
const reply = await client.chat.completions.create({
model: "upstage/solar-mini4:free",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(reply.choices[0].message.content);Example for Nous Portal. Any OpenAI-compatible client works: Cursor, Cline, OpenCode, Open WebUI.
Benchmarks
Source: Artificial Analysis · Solar Mini 4
Similar free models
FAQ
Is Solar Mini 4 free?
Yes. As of October 5, 2026, Solar Mini 4 is free at Nous Portal. Each provider has its own limits — see the table above.
What is the context window of Solar Mini 4?
The largest context among free routes is 524,288 tokens. Some providers cap it lower.
How do I call Solar Mini 4 via API?
Use any OpenAI-compatible client with base URL https://inference-api.nousresearch.com/v1, model ID upstage/solar-mini4:free, and a Nous Portal key.
How good is Solar Mini 4?
Artificial Analysis Intelligence Index: 24.1. For comparison, the strongest free model in the catalog right now is GLM 5.3.
Is Solar Mini 4 open-weight?
No, it is proprietary: access is only through provider APIs.