Solar Pro 3
Solar Pro 3 is a chat model from Upstage, released January 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...
by Upstage · 128K token context window
Best for
- low-latency chat and routing
- request routing and triage
- text classification
Ways to use Solar Pro 3 in osFoundry
Connect with your own key (BYOK)
Open the key dialog and paste your Upstage API key. osFoundry discovers Solar Pro 3 automatically — assign it to a Maestro role (router, direct, orchestrator, or fallback) in the Pipeline tab and it is live in every chat. Your key, your provider account — no token markup.
Use it in a Room App
Room Apps declare AI features in their manifest, then call them with invokeAI:
import { invokeAI } from '@osfoundry/app-sdk'
// 'summarize' is an AI feature declared in your app manifest.
const result = await invokeAI('summarize', userText)
Call it from your own apps
Once a model is wired into your workspace you can host it as an API and reach it from your own services, scripts, or CI — outside osFoundry.
Solar Pro 3 vs similar models
Licence
Hosted — usage subject to provider terms — Hosted-only model — usage governed by the provider's API terms. Bring your own provider key.
No weights distributed; usage subject to provider terms.
Frequently asked about Solar Pro 3
How much does Solar Pro 3 cost?
Solar Pro 3 is metered at $ 0.150 /1M for input, and $ 0.600 /1M for output. Bring your own Upstage API key — osFoundry passes through provider pricing without markup.
Can I use Solar Pro 3 commercially?
Commercial use is allowed with conditions. Hosted-only model — usage governed by the provider's API terms. Bring your own provider key. No weights distributed; usage subject to provider terms.
What is the context window of Solar Pro 3?
Solar Pro 3 supports a 128K token context window.
Can I run Solar Pro 3 locally?
No — Solar Pro 3 is hosted only and accessed via the Upstage API.
What is Solar Pro 3 best at?
Solar Pro 3 is well-suited to low-latency chat and routing, request routing and triage, text classification.
How do I use Solar Pro 3 in osFoundry?
Paste your Upstage API key in the key dialog (or deploy the open weights for self-hostable models), assign Solar Pro 3 to a Maestro role in the Pipeline tab, then use it in chat, Room Apps via invokeAI, or your own apps.
Published by Upstage on January 27, 2026. Source: https://openrouter.ai/upstage/solar-pro-3