Solar DecideUpstage
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Span-01Respan
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Related Products
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About
Solar Decide is Upstage’s structured decision model, serving as a System One endpoint on Solar Mini 4. Instead of generating prose, it takes a state together with one or more typed questions and returns a choice, score, or yes/no answer with calibrated probabilities taken directly from the model. Each question is handled in a single forward pass, making the model suited to fast classification, routing, policy checks, prioritization, and other structured decision tasks. The choice type selects among predefined options and returns the selected option, individual probabilities, and confidence. The score type evaluates an input against ordered criteria and returns a probability-weighted score, legend, probability distribution, and confidence. The noul type returns the probability that a yes-or-no proposition is true. Multiple questions can share the same state in one request, and the state can be provided as text or any JSON value serialized into the prompt.
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About
Span-01 is a hyper-parallel reasoning classifier built to detect complex behaviors across long production traces in a single forward pass. Rather than generating tokens sequentially, it reasons over natural-language behavior definitions and returns direct probabilities for present, absent, and not_observable. The model is trained for general classification reasoning with RLAIF before being specialized for behavior detection, allowing it to apply previously unseen definitions to new behaviors and domains instead of relying on a fixed taxonomy. At inference time, hyper-parallel definition branches evaluate multiple behaviors against the same trace context simultaneously, while hybrid attention helps preserve reasoning over long, complex inputs. Span-01 is designed for production monitoring across safety, reliability, grounding, agent behavior, and response quality, including jailbreak and prompt injection detection, privacy, and secrets.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
AI application teams in search of a tool to classify, route, score, and apply policy decisions through fast, probability-based structured outputs
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Audience
AI, safety, evaluation, and observability teams seeking to detect and score complex behaviors across long production traces with fast, probability-based classification
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Supported
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API
Offers API
Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
$0.1 per 1M tokens
Free Version
Not Supported
Free Trial
Not Supported
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Pricing
$199 per month
Free Version
Supported
Free Trial
Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Supported
In Person
Not Supported
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Company InformationUpstage
Founded: 2020
United States
console.upstage.ai/docs/models/solar-decide
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Company InformationRespan
Founded: 2023
United States
www.respan.ai/blog/introducing-span-1
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Alternatives |
Alternatives |
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Categories |
Categories |
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Integrations
AssemblyAI
Not Supported
Claude Code
Supported
Cognee
Not Supported
Google GenAI SDK
Not Supported
Hermes Agent
Supported
JSON
Supported
JavaScript
Not Supported
LangChain
Not Supported
LinkUp
Not Supported
LlamaIndex
Not Supported
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Integrations
AssemblyAI
Supported
Claude Code
Not Supported
Cognee
Supported
Google GenAI SDK
Supported
Hermes Agent
Not Supported
JSON
Not Supported
JavaScript
Supported
LangChain
Supported
LinkUp
Supported
LlamaIndex
Supported
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