Is GLM 4.5 Air available on FastMetal?

Not at the moment. GLM 4.7 Flash, from the same lab, is available on the FastMetal API today.

What is the context window of GLM 4.5 Air?

131,072 tokens, shared between the prompt and the response.

z-ai/glm-4-5-air

Not Available

GLM 4.5 Air

GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications. Like GLM-4.5, it adopts the Mixture-of-Experts (MoE) architecture but with a more compact parameter size. GLM-4.5-Air also supports hybrid inference modes, offering a "thinking mode" for advanced reasoning and tool use, and a "non-thinking mode" for real-time interaction. Users can control the reasoning behaviour with the `reasoning` `enabled` boolean. [Learn more in our docs](https://openrouter.ai/docs/use-cases/reasoning-tokens#enable-reasoning-with-default-config)

7/25/2025

131,072 tokens

Specifications

Modalities

Input

text

Output

text

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

Max Output Tokens

98,304

Frequently asked questions

Is GLM 4.5 Air available on FastMetal?: Not at the moment. GLM 4.7 Flash, from the same lab, is available on the FastMetal API today.
What is the context window of GLM 4.5 Air?: 131,072 tokens, shared between the prompt and the response.

Models you can use on FastMetal