Z.ai: GLM 5.3: AI model
GLM 5.3 is a large reasoning model for software engineering and long agent tasks from Z.ai with a 1M-token context window. Reachable from inside Iran through Hormouz.
- Context window:
- 1,048,576 tokens
- Input:
- $0.08/1M tokens
- Output:
- $4.8/1M tokens
- Type:
- text
- Tools
- Streaming
- Long context
Thinking levels: Always thinks · max · high · low
GLM 5.3 is Z.ai's large reasoning model, built for complex software engineering and long agent tasks over a 1M-token context. It improves on GLM-5.2 in coding and in getting more done per token. Reasoning is always on, with low, high and max effort levels; max is the default.
It accepts text 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 is commonly used for complex software engineering, coding agents, long-horizon automation and large-codebase work. 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: $1.4 per million input tokens and $4.4 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 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...
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",
"messages": [{"role": "user", "content": "Hello!"}]
}'Specs
| Vendor | Z.ai |
|---|---|
| Type | Text |
| Context window | 1,048,576 tokens |
| Pricing | $0.08/M in · $4.80/M out |
| API | Chat Completions |
| Capabilities | Streaming · Tools |
Benchmarks
Reasoning
Coding
Agentic
Source: Artificial Analysis
Design Arena
How Design Arena works ↗Ranking distribution
1411 tournaments ?
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",
"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",
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",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);Buy the Z.ai: GLM 5.3 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 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 cost?
- Pricing is usage-based: $1.4 per million input tokens and $4.4 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 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 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 have?
- It has a 1M-token context window, accepts text 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 good for?
- Typical uses are complex software engineering, coding agents, long-horizon automation and large-codebase work.
Updated 2026-10-13