upstage · Efficient
Solar Mini 4 Thinking
Solar Mini 4 with reasoning enabled for agentic tasks and harder analysis across a 524K-token context window.
- Reasoning
- Tools
- Structured output
- Input
- Text
- Output
- Text
- Reasoning effort
- none · low · medium · high
- Discovery tier
- Efficient
Pricing
USD per 1M tokens- Input
- $0.05
- Output
- $0.20
- Cache read
- $0.005
Reference prices as published by the model provider. API example
Specifications
- Context window
- 524.3K
- Max output
- 131.1K
- Average output (7 days)
- 2.8K tokens
- Longer than 95% of 465 models
Side by side
Solar Mini 4 Thinking compared
Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.
| Solar Mini 4 ThinkingupstageThis model | LFM2.5 24B A2BliquidRemove | |
|---|---|---|
| Provider | upstage | liquid |
| Discovery tier | Efficient | Efficient |
| Added | Sep 23, 2026 | Oct 14, 2026 |
| Limits | ||
| Context window | 524.29KBest | 128K |
| Max output | 131.07KBest | 8.19K |
| Average output | 2.8K tokens | 5.1K tokens |
| Pricing, USD per 1M tokens | ||
| Input | $0.05 | $0.05 |
| Output | $0.20Best | $0.70 |
| Cache read | $0.005Best | $0.025 |
| Performance | ||
| Request success (24h) | — | 100.0% |
| Capabilities | ||
| Reasoning | Yes | Yes |
| Tools | Yes | Yes |
| Structured output | Yes | Yes |
| Reasoning effort | none, low, medium, high | — |
Public evaluations
Benchmarks
There are no public benchmark results for these models yet.
Developers
Use it through the API
Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.
curl https://www.noumen.xyz/api/v1/chat/completions \
-H "Authorization: Bearer $NOUMEN_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "upstage/solar-mini4:thinking",
"reasoning_effort": "medium",
"messages": [{ "role": "user", "content": "Explain this stack trace." }]
}'import os
from openai import OpenAI
client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
model="upstage/solar-mini4:thinking",
messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)upstage
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