Z.ai: GLM 5.3 Flash: AI model
GLM 5.3 Flash is a native multimodal model for efficient coding and agents from Z.ai with a 1M-token context window. Reachable from inside Iran through Hormouz.
- Context window:
- 1,048,576 tokens
- Input:
- $0.03/1M tokens
- Output:
- $0.9/1M tokens
- Type:
- text, image, video
- Vision
- Tools
- Streaming
- Long context
Thinking levels: Always thinks · max · high · low
GLM 5.3 Flash is the efficient member of Z.ai's GLM-5.3 family. It takes text, images and video natively, and its hybrid sparse-and-linear attention keeps long-context answers accurate while cutting compute, so a 1M-token window stays affordable. It always reasons first, with low, high or max effort, and is aimed at coding and long agent tasks.
It accepts text, image and video input and returns text, and supports tool calling, structured JSON output and streaming. It always reasons before answering, and you choose how hard it thinks with the reasoning effort setting. GLM 5.3 Flash is commonly used for budget coding agents, long-document and video analysis, visual question answering and long agent runs. Hormouz serves it behind an OpenAI-compatible API: point your base URL at Hormouz, drop in a Hormouz key, and existing OpenAI SDK code runs without changes.
Pricing is usage-based: $0.15 per million input tokens and $0.5 per million output tokens. There is no fixed monthly fee, and you pay only for the tokens you use. Hormouz provides stable access to the model from inside Iran, with no foreign credit card or circumvention tooling required.
GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks. Its hybrid sparse and linear attention architecture maintains accurate long-context behavior while...
Quickstart
curl https://api.hormouz.net/v1/chat/completions \
-H "Authorization: Bearer ng-YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "z-ai/glm-5.3-flash",
"messages": [{"role": "user", "content": "Hello!"}]
}'Specs
| Vendor | Z.ai |
|---|---|
| Type | Text, Image, Video |
| Context window | 1,048,576 tokens |
| Pricing | $0.03/M in · $0.90/M out |
| API | Chat Completions |
| Capabilities | Streaming · Vision · Tools |
Benchmarks
Reasoning
Coding
Agentic
Source: Artificial Analysis
Design Arena
How Design Arena works ↗Metrics sourced from Design Arena
Code example
curl https://api.hormouz.net/v1/chat/completions \
-H "Authorization: Bearer ng-YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "z-ai/glm-5.3-flash",
"messages": [{"role": "user", "content": "Hello!"}]
}'from openai import OpenAI
client = OpenAI(api_key="ng-YOUR_API_KEY", base_url="https://api.hormouz.net/v1")
response = client.chat.completions.create(
model="z-ai/glm-5.3-flash",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({ apiKey: "ng-YOUR_API_KEY", baseURL: "https://api.hormouz.net/v1" });
const response = await client.chat.completions.create({
model: "z-ai/glm-5.3-flash",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);Buy the Z.ai: GLM 5.3 Flash API, paid in rial
- Buy credit with an Iranian bank card; no foreign card or account needed.
- One Hormouz key reaches Z.ai: GLM 5.3 Flash and 600+ other models, and you pay only for what you use.
- No VPN and no risk of a banned account; just change the base URL to api.hormouz.net/v1.
Use via Hormouz
Connect to this model and 600+ others with one API key, then see usage down to each request.
Request company accessFAQ
- How much does GLM 5.3 Flash cost?
- Pricing is usage-based: $0.15 per million input tokens and $0.5 per million output tokens. There is no fixed monthly fee, and you pay only for the tokens you use.
- How do I access GLM 5.3 Flash from inside Iran?
- Create an account on Hormouz and generate an API key. Hormouz provides a stable path to the model from inside Iran, with no foreign credit card or circumvention tooling required.
- Is GLM 5.3 Flash compatible with OpenAI code?
- Yes. Hormouz exposes an OpenAI-compatible API. Point your base URL at Hormouz and swap in your Hormouz key. Your existing SDKs and code run without a rewrite.
- What context window and capabilities does GLM 5.3 Flash have?
- It has a 1M-token context window, accepts text, image and video input, and supports tool calling, structured JSON output and streaming. It always reasons before answering, and you choose how hard it thinks with the reasoning effort setting.
- What is GLM 5.3 Flash good for?
- Typical uses are budget coding agents, long-document and video analysis, visual question answering and long agent runs.
Updated 2026-10-13