GLM 4.5 Air

by Z.ai

Zero data retention
z-ai/glm-4.5-air
Input
$0.18/1M tokens
Output
$1.19/1M tokens
Context
131Ktokens
Max output
98Ktokens
Knows to
December 2024
Released
25 Jul 2025

About

GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications.

Pricing

Input$0.18per 1M prompt tokens
Output$1.19per 1M generated tokens, reasoning included
Cached input$0.03per 1M tokens read back from the prompt cache

What a request costs

Typical requestEachPer 1,000
Short chat reply1,500 in · 400 out$0.0007$0.749
Question over a long document40,000 in · 800 out$0.0082$8.23
Agent tool step20,000 in · 1,200 out$0.0051$5.07

At the developer-API rate, before any provider promotion or prompt-cache saving. In the app, the model picker shows what a message costs on your plan before you send it.

Benchmarks

Intelligence11.1#209 of 285

Head-to-head rankings

  1. #61Data vizModel arenaElo 118859% wins
  2. #68SVGModel arenaElo 107151% wins
  3. #813DModel arenaElo 112354% wins
  4. #86UI componentsModel arenaElo 112254% wins
  5. #88WebsitesModel arenaElo 114851% wins
  6. #91CodeModel arenaElo 113951% wins
  7. #93Game devModel arenaElo 109748% wins

Scores from Artificial Analysis; bars are scaled to the best model on our list. Rankings from Design Arena head-to-head votes. Published by OpenRouter alongside its catalogue.

Call it from code

OpenAI-compatible: point any OpenAI SDK at https://api.privateer.pro/v1 and set model. Keys are created in the app under Settings.

cURL
curl https://api.privateer.pro/v1/chat/completions \
  -H "Authorization: Bearer $PRIVATEER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "z-ai/glm-4.5-air",
    "messages": [{ "role": "user", "content": "Hello" }]
  }'
Python
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.privateer.pro/v1",
    api_key=os.environ["PRIVATEER_API_KEY"],
)
reply = client.chat.completions.create(
    model="z-ai/glm-4.5-air",
    messages=[{"role": "user", "content": "Hello"}],
)
print(reply.choices[0].message.content)
JavaScript
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.privateer.pro/v1",
  apiKey: process.env.PRIVATEER_API_KEY,
});
const reply = await client.chat.completions.create({
  model: "z-ai/glm-4.5-air",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(reply.choices[0].message.content);

Parameters this model accepts

frequency_penaltyinclude_reasoningmax_tokenspresence_penaltyreasoningrepetition_penaltyseedstoptemperaturetool_choicetoolstop_ktop_p

API reference → · How API billing works →

Prices are USD at the developer-API rate, as of 16 Oct 2026, rebuilt daily from the providers’ live catalogues. ← All models