Span-01

Span-01

Respan
+
+

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About

The Decisions API turns text and images into typed decisions an application can use, evaluating inputs about 10x faster than the Responses API. Developers provide a model, shared input evidence, and one or more questions describing what should be evaluated, and the API returns structured answers that can be used to classify content, route requests, prioritize work, or make threshold-based decisions. It supports three question types: predicate checks whether a condition is true and returns a probability from 0 to 1; choice selects one value from a fixed set and returns option probabilities and confidence; and score evaluates an input against ordered rubric levels and returns a probability-weighted score. Inputs can be plain text or user messages containing both text and images, allowing applications to evaluate cases such as visible product damage, request intent, document type, issue severity, or answer relevance.

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.

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

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

Audience

Developers and AI application teams needing to classify, score, route, and prioritize text or image inputs through fast, structured model decisions

Audience

AI, safety, evaluation, and observability teams seeking to detect and score complex behaviors across long production traces with fast, probability-based classification

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

$199 per month
Free Version Supported
Free Trial Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Company Information

OpenAI
Founded: 2015
United States
developers.openai.com/api/docs/guides/decisions

Company Information

Respan
Founded: 2023
United States
www.respan.ai/blog/introducing-span-1

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Categories

AI Decision Models Supported

Categories

AI Decision Models Supported

Integrations

OpenAI Supported
AssemblyAI Not Supported
Cognee Not Supported
GPT-6 Luna Supported
Google GenAI SDK Not Supported
JavaScript Not Supported
LangChain Not Supported
LinkUp Not Supported
LlamaIndex Not Supported
Mastra AI Not Supported
Mem0 Not Supported
OpenAI Agents API Not Supported
PostHog Not Supported
Python Not Supported
TypeScript Not Supported
Vercel Not Supported

Integrations

OpenAI Supported
AssemblyAI Supported
Cognee Supported
GPT-6 Luna Not Supported
Google GenAI SDK Supported
JavaScript Supported
LangChain Supported
LinkUp Supported
LlamaIndex Supported
Mastra AI Supported
Mem0 Supported
OpenAI Agents API Supported
PostHog Supported
Python Supported
TypeScript Supported
Vercel Supported
Claim OpenAI Decisions API and update features and information
Claim OpenAI Decisions API and update features and information
Claim Span-01 and update features and information
Claim Span-01 and update features and information