Submit
Zhipu AIOpen-weight·1049K context·— params·Custom license — see model repository

GLM 5.3zhipu/glm-5-3

GLM 5.3 is Z.ai’s open-weight text reasoning model for software engineering, coding and long-running agent tasks. It supports a one-million-token context and up to 128K output tokens. The multimodal GLM 5.3 Flash family is listed separately.

Cheapest blended:$2.15 / 1M tokenson Zhipu AI · 1 provider listed

Availability and billing notes

Reviewed September 21, 2026 · check the linked provider documentation for later changes.

Official source 1 →Official source 2 →

Pricing across providers

Sort by:
ProviderInput /1MOutput /1MBlended /1MLatency p50FormatFreshnessAction
Zhipu AI
glm-5.3

International Z.ai API, USD. Coding Plan subscription usage is separate.

$1.4
Cached $0.26
$4.4$2.15—OpenAI-compatiblePrice 1mo agoTry →

Affiliate disclosure: We may earn a commission from qualified signups. Pricing independence is enforced at the data layer — see our Editorial Independence Policy.

Works with

Point any of these clients at a hosting's base URL — they all speak at least one of this model's endpoint protocols (OPENAI_COMPATIBLE).

Capabilities

  • code
  • reasoning
  • tool_calling

Code samples

Example using Zhipu AI — the cheapest hosting for this model as of last verification. Swap base_url and model to use a different provider from the matrix above.

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.z.ai/api/paas/v4",
)

response = client.chat.completions.create(
    model="glm-5.3",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

Technical specs

Context
1049K
Max output
131K
Parameters
—
Release
—
Training cutoff
—
License
Custom license — see model repository
Hugging Face →Official documentation →

Similar models

Compare with

  • GLM 5.3 vs DeepSeek V3.1
    Comparison planned — not yet published
  • GLM 5.3 vs R1
    Comparison planned — not yet published
  • GLM 5.3 vs DeepSeek V3
    Comparison planned — not yet published

Frequently asked

How much does GLM 5.3 cost?+
The cheapest public hosting is $2.15 per 1M blended tokens on Zhipu AI. 1 total providers are listed above with per-input / per-output / cached pricing.
How do I access GLM 5.3 from outside China?+
Availability, account verification and payment methods vary by provider and region. Check the official documentation and the selected provider's access requirements before integrating. A directory listing does not guarantee global API access.
Is GLM 5.3 open-source? Can I fine-tune it?+
GLM 5.3 has published weights. License: Custom license — see model repository. Review the linked repository and license for deployment, fine-tuning and commercial-use conditions.
Is GLM 5.3 OpenAI-compatible?+
At least one listed hosting exposes an OpenAI-compatible API, so you can point an existing openai SDK client at the Provider's base_url and use the Provider's model name. See the Code Samples above for a copy-pasteable example.
What's the maximum context window for GLM 5.3?+
The model supports up to 1,048,576 tokens of context (input + output). Some hosted versions may impose a smaller limit — check the "Context" column in the pricing matrix for each provider.