Solar Pro 3
UpstageReleased Jan 27, 2026
Solar Pro 3 is Upstage's powerful Mixture-of-Experts (MoE) language model. With 102B total parameters and 12B active parameters per forward pass, it delivers exceptional performance while maintaining computational efficiency. Optimized...
- Context window
- 128K tokens
- Input
- text
- Output
- text
- Tokenizer
- Other
- Released
- Jan 27, 2026
- Reasoning
- optional
Pricing
Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.
| Per 1M tokens | Provider | + 3% fee | You pay |
|---|---|---|---|
| Input | $0.150 | $0.0045 | $0.154 |
| Output | $0.600 | $0.018 | $0.618 |
| Cache read | $0.015 | $0.0004 | $0.015 |
Benchmarks
Artificial Analysis
- Intelligence index
- 14.1
- Coding index
- 16.2
- Agentic index
- 2.7
Supported parameters
- include_reasoning
- max_tokens
- reasoning
- response_format
- structured_outputs
- temperature
- tool_choice
- tools
Call it
OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model upstage/solar-pro-3.
curl https://api.openkey.ai/v1/chat/completions \
-H "Authorization: Bearer $OPENKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "upstage/solar-pro-3",
"messages": [{"role": "user", "content": "Hello"}]
}'import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.openkey.ai/v1",
api_key=os.environ["OPENKEY_API_KEY"],
)
completion = client.chat.completions.create(
model="upstage/solar-pro-3",
messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.openkey.ai/v1",
apiKey: process.env.OPENKEY_API_KEY,
});
const completion = await client.chat.completions.create({
model: "upstage/solar-pro-3",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);Questions
- How much does Solar Pro 3 cost via API?
- Through OpenKey, Solar Pro 3 costs $0.154 per 1M input tokens and $0.618 per 1M output tokens. That is the provider price ($0.150 / $0.600) plus a flat 3% fee — nothing else.
- What is Solar Pro 3's context window?
- Solar Pro 3 accepts up to 128K tokens of context.
- Is Solar Pro 3 OpenAI-compatible?
- Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "upstage/solar-pro-3" using any OpenAI SDK — only the base URL and API key change.
- What inputs does Solar Pro 3 support?
- Solar Pro 3 accepts text input and produces text output.