How much does GLM 5.3 Flash cost?

GLM 5.3 Flash is billed pay-as-you-go at $0.16 per 1M input tokens and $0.52 per 1M output tokens. There is no subscription — you only pay for what you use.

What can GLM 5.3 Flash do?

GLM 5.3 Flash is Z.ai's chat model, accessible through the Api.Airforce API.

Is GLM 5.3 Flash free to use?

GLM 5.3 Flash is a paid, pay-as-you-go model — no subscription, you are only charged for usage.

How do I use GLM 5.3 Flash via the API?

GLM 5.3 Flash is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID glm-5.3-flash with your Api.Airforce API key.

Who makes GLM 5.3 Flash?

GLM 5.3 Flash is Z.ai's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

Z.aiPaidOperational

GLM 5.3 Flash

API model name: glm-5.3-flash

GLM 5.3 Flash is Z.ai's chat model, served on the Api.Airforce unified API. It is priced at $0.16 per million input tokens and $0.52 per million output tokens. That is below the provider's $0.15 official input rate. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.

Get an API key View pricing

Pricing

Input / 1M tokens

$0.16

Output / 1M tokens

$0.52

Cache read / 1M tokens

$0.02

Official input rate

$0.15

Api.Airforce price vs. the provider's official rate.

Specifications

Provider: Z.ai
Type: chat model

What is GLM 5.3 Flash used for?

Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.

GLM 5.3 Flash vs. similar models

Model	Intelligence	Context	Input / 1M	Output / 1M
GLM 5.3 Flash	—	—	$0.16	$0.52
GLM 4	—	—	$5.58	$5.62
GLM 4 Airx	—	—	$0.58	$0.62
GLM 4 Flash	—	—	$0.04	$0.14

Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.

GLM 5.3 Flash — frequently asked questions

How much does GLM 5.3 Flash cost?: GLM 5.3 Flash is billed pay-as-you-go at $0.16 per 1M input tokens and $0.52 per 1M output tokens. There is no subscription — you only pay for what you use.
What can GLM 5.3 Flash do?: GLM 5.3 Flash is Z.ai's chat model, accessible through the Api.Airforce API.
Is GLM 5.3 Flash free to use?: GLM 5.3 Flash is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use GLM 5.3 Flash via the API?: GLM 5.3 Flash is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID glm-5.3-flash with your Api.Airforce API key.
Who makes GLM 5.3 Flash?: GLM 5.3 Flash is Z.ai's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

All models·Quickstart·Chat API reference

Use GLM 5.3 Flash via the API

OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass glm-5.3-flash as the model.

cURL

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer $AIRFORCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "glm-5.3-flash",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

Python

from openai import OpenAI
client = OpenAI(base_url="https://api.airforce/v1", api_key="$AIRFORCE_API_KEY")
r = client.chat.completions.create(
    model="glm-5.3-flash",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(r.choices[0].message.content)

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.airforce/v1", apiKey: process.env.AIRFORCE_API_KEY });
const r = await client.chat.completions.create({
  model: "glm-5.3-flash",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);