Explore Z.AI: GLM 4.5 Air Model

Discover flexible reasoning with GLM 4.5 Air's dual inference modes.

Input: text Output: text Context: 131,072 tokens Release: 2025-07-25

Z.AI's GLM 4.5 Air, released on July 25, 2025, is a streamlined text-based AI model designed for agent-centric applications. It features a Mixture-of-Experts (MoE) architecture with a more compact parameter size, making it a lightweight variant of the GLM 4.5 family. The model supports a context length of up to 131,072 tokens, allowing for extensive text interaction. With its dual-mode inference—'thinking mode' for advanced reasoning and 'non-thinking mode' for real-time interaction—users can tailor the model's reasoning capabilities to fit their needs. Input and output are text-based, with a variety of parameters available for customization, such as frequency and presence penalties, temperature, and more. Ideal for applications requiring flexible reasoning and efficient text processing.

Use Cases

Here are a few ways teams apply Z.AI: GLM 4.5 Air (free) in practice—from fast drafting to multimodal understanding. Adapt these ideas to your workflow.

Enhance agent-centric applications

Facilitate advanced text reasoning

Enable real-time text interactions

Customize text processing parameters

Optimize for lightweight deployments

Key Features

A quick look at the capabilities that make this model useful in real projects.

Compact Mixture-of-Experts architecture

Context length up to 131,072 tokens

Hybrid inference modes for flexibility

Customizable reasoning behavior

Text input and output modalities

Supports various parameter adjustments

Specs

Overview

Vendor
z-ai

Model ID
z-ai/glm-4.5-air:free

Release
2025-07-25

Modalities & context

Input
text

Output
text

Context
131,072 tokens

Parameters & defaults

Supported parameters: frequency_penalty, include_reasoning, max_tokens, presence_penalty, reasoning, repetition_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_p

Defaults: temperature 0.75, top_p 0.95

Benchmark tests: Z.AI: GLM 4.5 Air (free)

We ran this model against a few representative prompts to show its range. Review the outputs below and be the judge.

Text

Prompt:

Write 150 words on how AI might positively upend work, leisure and creativity

AI is poised to be a powerful catalyst for positive change, fundamentally reshaping our lives. In the workplace, it will automate mundane tasks, freeing humans to focus on strategic thinking, innovation, and complex problem-solving. This shift promises not just greater efficiency but more meaningful and engaging work. For leisure, AI will deliver hyper-personalized experiences, from crafting unique itineraries to generating bespoke entertainment, making our downtime richer and more fulfilling. Perhaps most profoundly, AI will become a collaborative partner in creativity. It can serve as an infinite muse, offering novel ideas and overcoming creative blocks for artists, musicians, and writers. This human-AI synergy will unlock new forms of expression and push the boundaries of what we consider possible, ushering in an era of unprecedented innovation and artistic discovery.

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up.end

/ˌəpˈend/

verb

To “upend” means to completely disrupt, overturn, or drastically change the established order or structure of something. It implies a significant shift or alteration that can potentially have far-reaching consequences. When something is upended, it is turned upside down or transformed in a way that challenges conventional norms or expectations. The term often carries a sense of innovation, transformation, and sometimes even a hint of upheaval, indicating that the changes are not just minor adjustments but rather a fundamental reimagining of the status quo.

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