GLM 4.5 Air
Z.aiReleased Jul 25, 2025
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...
- Context window
- 131K tokens
- Max output
- 98K tokens
- Input
- text
- Output
- text
- Tokenizer
- Other
- Knowledge cutoff
- Dec 31, 2024
- Released
- Jul 25, 2025
- Reasoning
- optional
Pricing
Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.
| Per 1M tokens | Provider | + 3% fee | You pay |
|---|---|---|---|
| Input | $0.130 | $0.0039 | $0.134 |
| Output | $0.850 | $0.025 | $0.875 |
| Cache read | $0.025 | $0.0008 | $0.026 |
Benchmarks
Design Arena
| Category | Elo | Win rate | Rank |
|---|---|---|---|
| 3Dmodels | 1200 | 54.1% | #44 |
| Codemodels | 1187 | 51.5% | #58 |
| Data vizmodels | 1237 | 59.4% | #33 |
| Game devmodels | 1160 | 48.4% | #61 |
| SVGmodels | 1129 | 50.8% | #47 |
| UI componentsmodels | 1179 | 54.6% | #55 |
| Websitesmodels | 1189 | 51.3% | #57 |
Head-to-head preference voting. How we filter and rank
Supported parameters
- frequency_penalty
- include_reasoning
- max_tokens
- presence_penalty
- reasoning
- repetition_penalty
- seed
- stop
- temperature
- tool_choice
- tools
- top_k
- top_p
Call it
OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model z-ai/glm-4.5-air.
curl https://api.openkey.ai/v1/chat/completions \
-H "Authorization: Bearer $OPENKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "z-ai/glm-4.5-air",
"messages": [{"role": "user", "content": "Hello"}]
}'import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.openkey.ai/v1",
api_key=os.environ["OPENKEY_API_KEY"],
)
completion = client.chat.completions.create(
model="z-ai/glm-4.5-air",
messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.openkey.ai/v1",
apiKey: process.env.OPENKEY_API_KEY,
});
const completion = await client.chat.completions.create({
model: "z-ai/glm-4.5-air",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);Questions
- How much does GLM 4.5 Air cost via API?
- Through OpenKey, GLM 4.5 Air costs $0.134 per 1M input tokens and $0.875 per 1M output tokens. That is the provider price ($0.130 / $0.850) plus a flat 3% fee — nothing else.
- What is GLM 4.5 Air's context window?
- GLM 4.5 Air accepts up to 131K tokens of context and returns up to 98K tokens per request.
- Is GLM 4.5 Air OpenAI-compatible?
- Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "z-ai/glm-4.5-air" using any OpenAI SDK — only the base URL and API key change.
- What inputs does GLM 4.5 Air support?
- GLM 4.5 Air accepts text input and produces text output. Its knowledge cutoff is Dec 31, 2024.
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