GLM-5.1

zai-org/glm-5.1

GLM-5.1 is Z.AI's latest flagship model, meticulously engineered for long-horizon autonomous tasks. Capable of working continuously on a single assignment for up to 8 hours, it autonomously manages the entire workflow—from initial planning and execution to iterative optimization and the delivery of production-grade results. While its general capabilities and coding proficiency are on par with Claude Opus 4.6, GLM-5.1 excels particularly in sustained execution, complex engineering optimization, and real-world development scenarios. This makes it the ideal foundational model for powering advanced autonomous agents and long-horizon coding assistants.

Features

Serverless API

Docs

zai-org/glm-5.1 is available via Novita's serverless API, where you pay per token. There are several ways to call the API, including OpenAI-compatible endpoints with exceptional reasoning performance.

Available Serverless

Run queries immediately, pay only for usage

Input$1.4 / M Tokens

Cache Read$0.26 / M Tokens

Output$4.4 / M Tokens

Use the following code examples to integrate with our API:

1from openai import OpenAI
2
3client = OpenAI(
4    api_key="<Your API Key>",
5    base_url="https://api.novita.ai/openai"
6)
7
8response = client.chat.completions.create(
9    model="zai-org/glm-5.1",
10    messages=[
11        {"role": "system", "content": "You are a helpful assistant."},
12        {"role": "user", "content": "Hello, how are you?"}
13    ],
14    max_tokens=131072,
15    temperature=0.7
16)
17
18print(response.choices[0].message.content)

Info

Provider

Zai-org

Quantization

fp8

Supported Functionality

Context Length

204800

Max Output

131072

Serverless

Supported

Function Calling

Supported

Structured Output

Supported

Reasoning

Supported

Anthropic API

Supported

Input Capabilities

text

Output Capabilities

text