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What is Tev1?

Tev1 is an advanced model designed for quick decision-making and classification, created by Together AI and fine-tuned from Qwen3.5 4B. It features an intuitive interface that allows users to enter a state, pose a question, and select from 2 to 24 labeled options, leading to an output of a single letter that corresponds to a semantic key via software. This innovative structure is particularly advantageous for diverse production tasks, including the routing of support tickets, evaluating automated returns, implementing policy guidelines, conducting sentiment analysis, categorizing documents, and embedding precise decision-making within extensive agent workflows. With its impressive 4.7B parameter count and a context window of 32.8K tokens, Tev1 leverages non-thinking generation to deliver swift and dependable classifications. The model has been honed using a broad collection of 37,840 examples that encompass intent detection, boolean comprehension, sentiment evaluation, policy enforcement, and the categorization of news articles and academic research. For optimal performance, it is recommended to set the temperature to 0 and maintain a low output budget, which ensures that the results remain both consistent and easy to understand. Furthermore, Tev1 is recognized as a highly adaptable tool that meets a variety of classification requirements effectively and efficiently. Overall, its capabilities make it an essential asset in any decision-making framework.

What is Span-01?

Span-01 represents a cutting-edge hyper-parallel reasoning classifier designed to detect complex patterns within large production traces in a single forward pass. Rather than generating tokens sequentially, it evaluates natural-language behavior definitions and outputs direct probabilities that indicate whether a specific behavior is present, absent, or unobservable. The model begins with a foundational training phase focused on general classification reasoning through Reinforcement Learning with Human Feedback (RLAIF), which is followed by fine-tuning aimed explicitly at behavior detection. This training methodology empowers Span-01 to effectively leverage previously unseen definitions for both new behaviors and diverse domains, thereby circumventing the constraints of a fixed taxonomy. During inference, its hyper-parallel definition branches are capable of assessing multiple behaviors at once against the same trace context. Additionally, the use of hybrid attention enhances its ability to reason over lengthy and complex inputs. Engineered for the scrutiny of production environments, Span-01 emphasizes safety, reliability, grounding, agent behavior, and response quality while tackling challenges like jailbreak and prompt injection detection alongside privacy and confidentiality issues. This innovative methodology not only makes Span-01 a noteworthy milestone in the domain but also paves the way for more efficient and thorough investigations into intricate behaviors, ultimately leading to improved decision-making processes. As a result, its deployment could significantly enhance operational standards across various industries.

Media

Media

Integrations Supported

Python
TypeScript
Qwen3.5

Integrations Supported

Python
TypeScript
AssemblyAI
Cognee
Google GenAI SDK
JavaScript
LangChain
LinkUp
LlamaIndex
Mastra AI
Mem0
OpenAI
OpenAI Agents API
PostHog
Vercel

API Availability

Has API

API Availability

Has API

Pricing Information

$0.04 per 1M tokens
Free Version

Pricing Information

$199 per month
Free Version
Free Trial Offered?

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub
Online Training

Company Facts

Organization Name

Together AI

Date Founded

2022

Company Location

United States

Company Website

www.together.ai/models/tev1-4b-experimental

Company Facts

Organization Name

Respan

Date Founded

2023

Company Location

United States

Company Website

www.respan.ai/blog/introducing-span-1

Categories and Features

AI Decision Models

Not specified

Categories and Features

AI Decision Models

Not specified

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