Where is the Solar Decide documentation?

The Solar Decide documentation on OpenRouter includes the interactive Decisions Lab. The quickstart covers API keys and your first request, and the API reference lists every parameter.

How much does Solar Decide cost?

Solar Decide costs $0.05/M input tokens and $0.00/M output tokens, with separate rates for Cache Read at $0.05/M tokens.

What is the context length of Solar Decide?

Solar Decide has a 524,288 token context window.

What inputs and outputs does Solar Decide support?

Solar Decide accepts text as input and returns structured decisions.

Which providers serve Solar Decide?

Solar Decide is served by 1 provider on OpenRouter: Upstage.

What other text models does Upstage have?

Solar Decide Flash, Solar Mini 4, and Solar Pro 4 are other text models from Upstage.

When was Solar Decide released?

Solar Decide was released on September 28, 2026.

Upstage: Solar Decide

upstage/solar-decide

Compare

Solar Decide is Upstage's structured decision model, served as a System One endpoint on Solar Mini 4. Send a state along with typed questions, and it returns a choice, a score, or a yes/no answer, each with a calibrated probability taken directly from the model rather than written out as text. Because it generates no prose, each decision takes a single forward pass and output tokens are free. With a 512K context window, an entire document can serve as the state. Solar Decide uses the same /v1/systemone schema as Jev, bringing Solar Mini 4's strong Korean understanding to routing, classification, and policy checks.

Modalities

In / out price

50% off

$0.05 / $0per 1M

Context

524K

Released

Sep 28, 2026

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick: Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Latency


50% off	$0.10$0.05	Free	$0.10$0.05	7.53s	99.88%
50% off	$0.10$0.05	Free	$0.10$0.05	7.45s	99.83%

Input $0.05Output Free50% off
7.53s latency99.88% uptime
Input $0.05Output Free50% off
7.45s latency99.83% uptime

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Weighted average

Input

$0.09997/M tokens

Output

$0/M tokens

Solar Decide — Price history

Price history

No effective price data for this selection

		$0.100	$0.00	53.5%
		$0.100	$0.00	46.5%

Effective in $0.100Effective out $0.00
Token share
53.5%
Effective in $0.100Effective out $0.00
Token share
46.5%

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Uptime (3d)

99.99%

Availability (3d)

98.71%

Availability over the last 3 days

Last 72 hours

Availability 98.71%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

99.99%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Not currently available through EU in-region routing. In-region routing docs

More models from upstage

Solar Decide Flash

Solar Decide Flash is Upstage's low-latency structured decision model, a faster variant of Solar Decide built on Solar Mini 4 and served through the System One (/v1/systemone) API. Instead of generating text, it reads a state and answers typed questions, returning a choice, a score, or a yes/no answer, each with a probability taken directly from the model. Each decision is a single forward pass, and output tokens are free.

It is tuned for consistently fast response times in routing, classification, and policy checks. It keeps the 512K context window, so a full document can serve as the state, and carries Solar Mini 4's Korean-language strength.

Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window. It is built for agentic use cases where response speed and cost matter, with fluent Korean alongside strong English and Japanese, and support for long-context workloads.

When using BYOK with ZDR enforcement, the Console API key must belong to a ZDR-enabled Upstage organization. Contact Upstage to enable ZDR on your org.

Text524K context$0.05 / $0.20

Solar Pro 4

Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window. It is built for long-horizon tasks and agentic workflows, with strong capabilities in office productivity, document-intensive work, and coding.

When using BYOK with ZDR enforcement, the Console API key must belong to a ZDR-enabled Upstage organization. Contact Upstage to enable ZDR on your org.

Text524K context$0.15 / $0.60

Solar Pro 3

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 for Korean with English and Japanese support.

Text128K context

Upstage: Solar Decide

Playground

Providers