GLM-5.3 · 1M tokens

Z.ai's flagship. The same base as GLM-5.2 with all gains coming from post-training: roughly 50% stronger coding and state-of-the-art open-source results on Terminal Bench 3.0. Reasoning is always on and can be dialled from low to max.

What you get

• 1M tokens for every unit you buy. Order several units to stack quota.
• A personal access key for glm-5.3, issued automatically once your order is completed.
• No shipping: delivery is digital, under My Account > Order History and by email.

Capabilities

• Flagship
• Reasoning max
• Tool calls
• Structured output

Best for

Repository-scale refactors, long-horizon agents and security review.

Quick start

from zai import ZaiClient

client = ZaiClient(api_key="YOUR_ACCESS_KEY", base_url="YOUR_BASE_URL")
response = client.chat.completions.create(
    model="glm-5.3",
    messages=[{"role": "user", "content": "Hello"}],
    reasoning_effort="max",
)

print(response.choices[0].message.content)