GLM-5.1

GLM-5.1

Z.ai
Span-01

Span-01

Respan
+
+

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About

GLM-5.1 is the latest iteration of Z.ai’s GLM series, designed as a frontier-level, agent-oriented AI model optimized for coding, reasoning, and long-horizon workflows. It builds on the GLM-5 architecture, which uses a Mixture-of-Experts (MoE) design to deliver high performance while keeping inference costs efficient, and is part of a broader push toward open-weight, developer-accessible models. A core focus of GLM-5.1 is enabling agentic behavior, meaning it can plan, execute, and iterate across multi-step tasks rather than simply responding to single prompts. It is specifically designed to handle complex workflows such as debugging code, navigating repositories, and executing chained operations with sustained context. Compared to earlier models, GLM-5.1 improves reliability in long interactions, maintaining coherence across extended sessions and reducing breakdowns in multi-step reasoning.

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 Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises 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 teams who need a cost-efficient, agent-capable model for coding, automation, and long multi-step workflows with flexible deployment options

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

Free
Open source
Free Version 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

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

Review this Software

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

Z.ai
Founded: 2023
China
z.ai/

Company Information

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

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Categories

AI Coding Models Supported
AI Models Supported
Foundation Models Supported

Categories

AI Decision Models Supported

Integrations

JavaScript Supported
Python Supported
TypeScript Supported
C++ Supported
Claw Code Supported
GLM Coding Plan Supported
GLM-5-Turbo Supported
LangChain Not Supported
OpenAI Not Supported
OpenAI Agents API Not Supported
OpenRouter Supported
PyTorch Supported
R Supported
Roo Code Supported
Rust Supported
SQL Supported
Swift Supported
Tabbit Browser Supported
Together AI Supported
Vercel Not Supported

Integrations

JavaScript Supported
Python Supported
TypeScript Supported
C++ Not Supported
Claw Code Not Supported
GLM Coding Plan Not Supported
GLM-5-Turbo Not Supported
LangChain Supported
OpenAI Supported
OpenAI Agents API Supported
OpenRouter Not Supported
PyTorch Not Supported
R Not Supported
Roo Code Not Supported
Rust Not Supported
SQL Not Supported
Swift Not Supported
Tabbit Browser Not Supported
Together AI Not Supported
Vercel Supported
Claim GLM-5.1 and update features and information
Claim GLM-5.1 and update features and information
Claim Span-01 and update features and information
Claim Span-01 and update features and information