# Upstage: solar-decide

> Upstage's structured decision model, a System One endpoint on Solar Mini 4. Returns a choice, a score or a yes/no answer with a probability read from the model, in one forward pass, on the same /v1/systemone schema as Jev.

- Page: https://systemonemodels.tech/upstage/solar-decide
- API: https://api.systemonemodels.tech/v1/models/upstage/solar-decide

## Facts

| | |
|---|---|
| Maker | Upstage (https://systemonemodels.tech/upstage) |
| Decides | choice, score, noul, classify, route |
| Architecture | solar |
| Context | 512K tokens |
| Licence | proprietary |
| Availability | Hosted API |
| Released | 2026-09-22 |
| Latest version | 2026.09 |

## Hosted API

- Provider: Upstage (https://console.upstage.ai/docs/models/solar-decide)

- Input: $0.10/MTok · Output: Free

## Model card

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# Solar Decide

Upstage's structured decision model, a System One endpoint on Solar Mini 4. Returns a choice, a score or a yes/no answer with a probability read from the model, in one forward pass, on the same /v1/systemone schema as Jev.

In beta on the Upstage Console (released 22 September 2026 per the console; OpenRouter lists it from 28 September on its Decisions API). $0.10 per million input tokens, output free, cached input $0.10; OpenRouter shows a 50% promotion to $0.05. A 512K-token context lets a whole document be the state, and Upstage highlights its Korean understanding. Solar Mini 4 is a 35B mixture of experts with 3B active parameters (Upstage Console). No accuracy numbers are published.

## What it decides

- **choice** — picks one option from a set
- **score** — places the input on an ordered scale
- **noul** — answers a yes/no question with one calibrated probability
- **classify** — assigns a category from a fixed taxonomy
- **route** — sends the input to one of several destinations

## At a glance

| | |
|---|---|
| Maker | Upstage |
| Released | 2026-09-22 |
| License | proprietary |

## Hosted API

Served by **Upstage** — $0.1/MTok input, $0/MTok output. [Get access](https://console.upstage.ai/docs/models/solar-decide).

## Read more

- [Upstage Console model page](https://console.upstage.ai/docs/models/solar-decide)
- [On OpenRouter](https://openrouter.ai/upstage/solar-decide)

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*This page was opened by System One for Upstage, who can claim the organisation and take it over at any time.*

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From System One Models — https://systemonemodels.tech/ · every System One model: https://systemonemodels.tech/system-one-models