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Z.ai: 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. $0.13 per million input tokens, $0.85 per million output tokens. 131,072 token context window, maximum output of 98,304 tokens. Higher uptime with 3 providers. Includes independent benchmarks from Artificial Analysis.

View source on OpenRouter Hugging Face
Overview

Model specifications

Context
131,072 tokens
Maximum output
98,304 tokens
Architecture
text->text
Tokenizer
Other
Knowledge cutoff
2024-12-31
Moderated
No
OPENROUTER

Complete pricing

Synchronized OpenRouter rates. Token prices are shown per one million tokens.

Input
$0.13
/M tokens
Output
$0.85
/M tokens
Cache read
$0.025
/M tokens
API

Model configuration

Default parameters

temperature
0.75

Reasoning

Moderated
No
Default parameters
No
API

Quick start

Call this exact model ID through OpenRouter’s OpenAI-compatible API.

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"z-ai/glm-4.5-air","messages":[{"role":"user","content":"Hello!"}]}'
Capabilities

Input → Output

Input
text
Output
text
Reasoning

No

API

Supported API parameters

frequency_penaltyinclude_reasoningmax_tokenspresence_penaltyreasoningrepetition_penaltyseedstoptemperaturetool_choicetoolstop_ktop_p
Available providers

3 providers

Live providers on OpenRouter

Provider availability, latency, throughput and routing can change continuously. Open the source page for current operational data.

OpenRouter

Novita

bf16
Context
131K
Maximum output
98K
Input
$0.130
Output
$0.850
Cache read
$0.025
Cache write
Not provided

SiliconFlow

fp8
Context
131K
Maximum output
118K
Input
$0.140
Output
$0.860
Cache read
Not provided
Cache write
Not provided

Z.AI

fp8
Context
131K
Maximum output
98K
Input
$0.200
Output
$1.10
Cache read
$0.030
Cache write
Not provided
z-ai

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