Is GLM 4.5 available on FastMetal?

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

What is the context window of GLM 4.5?

131,000 tokens, shared between the prompt and the response.

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Z.ai

z-ai/glm-4-5

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GLM 4.5

GLM-4.5 is our latest flagship foundation model, purpose-built for agent-based applications. It leverages a Mixture-of-Experts (MoE) architecture and supports a context length of up to 128k tokens. GLM-4.5 delivers significantly enhanced capabilities in reasoning, code generation, and agent alignment. It supports a hybrid inference mode with two options, a "thinking mode" designed for complex reasoning and tool use, and a "non-thinking mode" optimized for instant responses. Users can control the reasoning behaviour with the `reasoning` `enabled` boolean.

7/25/2025

131,000 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

131,000

Data policy

Prompt retention: Unknown — we could not confirm
Training: Unknown — not declared

"Unknown" does not mean "safe". It means we could not confirm it.

Whether a provider trains on prompts is a declared value from our terms with them. Retention is determined from the upstream listing for every host this model can reach. Neither is guessed.

Frequently asked questions

Is GLM 4.5 available on FastMetal?: Not at the moment. GLM 4.7, from the same lab, is available on the FastMetal API today.
What is the context window of GLM 4.5?: 131,000 tokens, shared between the prompt and the response.

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