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OpenKey

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...

Try in playground
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 tokensProvider+ 3% feeYou 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.

Code sample language
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.