Solar Decide Flash via the Tokenator API
What the model is for
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.
Specification
| Full name | Solar Decide Flash |
| API ID | solar-decide-flash |
| Model vendor | Upstage |
| Type | Decisions (probabilities for typed questions) |
| Context window | 524.3K tokens |
| Tokenator usage multiplier | 1.1× |
| Badge | NEW |
| Input modalities | text |
| Supported API formats | /v1/decisions |
| Upstream providers | 1 |
| Current status | available |
| Data updated | 2026-10-08 |
Upstream providers
| Provider | Multiplier |
|---|---|
| Unified LLM API | 1.1× |
A request goes to the first available provider by priority; if it fails, Tokenator switches to the next one.
Example request
curl https://api.tokenator.top/v1/decisions \ -H "Authorization: Bearer sk-your-tokenator-key" \ -H "Content-Type: application/json" \ -d '{ "model": "solar-decide-flash", "state": "My checkout page shows a blank screen after I click Pay. I have tried two browsers.", "questions": { "is_bug": { "type": "noul", "instructions": "Is the customer reporting a software defect?", "criteria": { "true": "The customer describes broken or unexpected product behavior.", "false": "The customer is asking a question or requesting a feature." } }, "team": { "type": "choice", "instructions": "Which team should own this ticket?", "criteria": { "account": "Login, permissions, or profile issues.", "frontend": "Rendering, layout, or browser compatibility issues.", "payments": "Checkout, billing, or payment processing issues." } }, "urgency": { "type": "score", "instructions": "How urgent is this ticket?", "criteria": [ "Can wait for the next release", "Should be fixed this week", "Blocking revenue right now" ] } } }'
See also
FAQ about Solar Decide Flash
What is the API ID of Solar Decide Flash?
solar-decide-flash — put this into the model field of your request.
What context window does Solar Decide Flash have?
524.3K tokens.
How many tokens will a request cost?
input × 1.1× — the answer with its probabilities is not billed, you pay for the input only: the state and the questions. See the documentation for details.
How do I call this model?
Through /v1/decisions only: the chat endpoints refuse such a model. Question types, the answer shape and examples are in the decisions documentation.