Z.ai: GLM 5.3 Prime✓ Catalog verified
GLM-5.3-Prime is the high-speed variant of Z.ai's GLM-5.3, inheriting its full capabilities while delivering 1.5–2× the output throughput through inference acceleration. It supports text input and output with a 1M-token...
Overview
GLM-5.3-Prime is the high-speed variant of Z.ai's GLM-5.3, inheriting its full capabilities while delivering 1.5–2× the output throughput through inference acceleration. It supports text input and output with a 1M-token...
Access: available through the official Z Ai API. Context window: 1M.
Specifications
| API identifier | z-ai/glm-5.3-prime |
| Provider | Z Ai |
| Model type | Text LLM |
| Context window | 1M catalog |
| Input modalities | text |
| Output modalities | text |
| Released | Sep 23, 2026 |
| Moderated | No |
| Architecture modality | text->text |
API defaults
{
"top_p": 0.95,
"temperature": 1
}Pricing
Live pricing components for z-ai/glm-5.3-prime as published in the catalog.
| Pricing component | Raw unit price | Normalized | Unit |
|---|---|---|---|
| Prompt tokens | $0.0000028 | $2.80 / 1M | Per input token |
| Completion tokens | $0.0000088 | $8.80 / 1M | Per output token |
| Request fee | N/A | N/A | Per request |
| Image fee | N/A | N/A | Per image unit |
| Web search fee | N/A | N/A | Per search request |
Cost calculator
Estimate monthly spend from your own token volumes.
Estimated Total Cost
$3.16Calculated from current list pricing in the ModelsAtlas catalog.Capabilities
| Capability | Status | What it means |
|---|---|---|
| Visual Understanding | Not advertised | Image and document analysis support |
| Audio Processing | Not advertised | Speech and voice aligned flows |
| Tool Calling | ✓ Supported | Supports tools / function calling |
| Self-Hosting | Not advertised | Deploy outside managed APIs |
Capability signals
Directional signals derived from model metadata and capability tags — not official benchmark submissions.
Quick start
Call Z.ai: GLM 5.3 Prime through an OpenAI-compatible client.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_API_KEY"
)
response = client.chat.completions.create(
model="z-ai/glm-5.3-prime",
messages=[{"role": "user", "content": "Explain quantum physics."}]
)
print(response.choices[0].message.content)Alternatives
Closest models by context window from a different provider.
| Model | Provider | Context | Input /1M | Actions |
|---|---|---|---|---|
| Amazon: Nova 2 Lite | Amazon | 1M | $0.30 | View → |
| Amazon: Nova Premier 1.0 | Amazon | 1M | $2.50 | View → |
Sources & attribution
Pricing and metadata are maintained in the ModelsAtlas catalog.
Frequently asked questions
How much does Z.ai: GLM 5.3 Prime cost?
$2.80 per 1M input tokens and $8.80 per 1M output tokens on the official Z Ai API.
What is the context window of Z.ai: GLM 5.3 Prime?
Z.ai: GLM 5.3 Prime supports up to 1M tokens of context.
Does Z.ai: GLM 5.3 Prime support tool / function calling?
Yes, Z.ai: GLM 5.3 Prime supports tool / function calling — you can register tools and the model will emit structured tool calls.
How do I access Z.ai: GLM 5.3 Prime?
Use the official Z Ai API with the model id `z-ai/glm-5.3-prime`. See the Quick start section above for code examples.