Solar Pro 4

Solar Pro 4 is the commercial flagship of Upstage, the Korean AI company, rebuilt for agent work. Its defining trait is restraint: Upstage designed it to say it cannot verify a claim instead of inventing one, and to answer from the evidence in long, multi-document inputs. That roughly tripled its Artificial Analysis Intelligence Index score over Solar Pro 3, to 42.

Upstage officially supports English, Korean and Japanese, and reports 89.0% on GPQA Diamond. Some of its gains come from declining to answer rather than knowing more — which is exactly what you want when the documents are contracts and reports.

For scale: 1,000 requests of about 3,000 tokens in and 1,000 out cost $0.82 — a long prompt and a page of answer each. Every rate is published and stays the same from one request to the next. See every model.

Solar Pro 4 is billed in rupees, on the same monthly invoice as every other model your team uses — no foreign card, no separate Upstage account, and one key for all of it.

Prompts sent to Solar Pro 4 are processed outside Sri Lanka. If a workload has to stay in the country, Qwen3.8-27B (Colombo) runs on our own servers in Colombo.

Use the OpenAI SDK you already have — point it at Roar AI and name the model. Read the docs.

from openai import OpenAI

client = OpenAI(base_url="https://api.roar-ai.com/v1", api_key="roar_live_…")

reply = client.chat.completions.create(
    model="solar-pro4",
    messages=[{"role": "user", "content": "Summarise this contract in plain English."}],
)