What is Z.ai: GLM-5's context window?

Z.ai: GLM-5 supports a context window of 200,000 tokens, allowing you to process large documents and maintain long conversations.

How to use Z.ai: GLM-5 API via Ofox?

Simply set your base URL to https://api.ofox.io/v1 and use your Ofox API key. The API is OpenAI-compatible — just change the base URL and API key in your existing code.

Z.ai: GLM-5

Name: Z.ai: GLM-5
Brand: z-ai
Price: 1 USD
Availability: InStock

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z-ai/glm-5

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GLM-5 is Z.ai's flagship open-source foundation model, engineered for complex systems design and long-horizon agent workflows. Built for expert developers, it delivers production-grade performance on large-scale programming tasks and combines advanced agentic planning, deep backend reasoning, and iterative self-correction, moving beyond code generation toward full-system construction and autonomous execution. It supports reasoning, function calling (tool use), prompt caching, and web search. Context: 200K tokens, output: 128K. Available via OpenAI and Anthropic protocols through Ofox.

Context Window

200K

Max Output Tokens

128K

Released

2026-02-11

Capabilities

Function CallingReasoningPrompt CachingWeb Search

Available Providers

Z.aiAliyun

Supported Protocols

openaianthropic

Providers

Aliyunprovider.type: "aliyun"

Input Tokens

$1/M

Output Tokens

$3.2/M

Cache Read

$0.2/M

Web Search

$0.01/R

Protocols

openai/v1/chat/completions

anthropic

Z.aiprovider.type: "zai"

Input Tokens

$1/M

Output Tokens

$3.2/M

Cache Read

$0.2/M

Web Search

$0.01/R

Protocols

openai/v1/chat/completions

anthropic

Playground

Open in OfoxChat

Code Examples

from openai import OpenAI

client = OpenAI(
    base_url="https://api.ofox.io/v1",
    api_key="YOUR_OFOX_API_KEY",
)

response = client.chat.completions.create(
    model="z-ai/glm-5",
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)

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

Uptime & Status

Benchmarks

LMArena ↗Evaluated as glm-5

Z.ai: GLM-5 scores 1456 in the Overall category of the LMArena text leaderboard (style control), ranking #44 of 374 models based on 27,815 human preference votes (updated 2026-07-12).

Benchmark scores for glm-5 on LMArena
Category	Arena Score	95% CI	Rank	Votes
Overall	1456	1452–1461	#44 of 374	27,815
Hard Prompts	1478	1472–1483	#44 of 374	17,145
Coding	1498	1490–1505	#54 of 369	7,214
Math	1443	1428–1457	#56 of 362	1,607
Creative Writing	1445	1435–1454	#32 of 372	4,518
Instruction Following	1446	1440–1453	#46 of 374	8,912
Chinese	1523	1507–1539	#14 of 344	1,511

Source: LMArena · CC BY 4.0 · Updated 2026-07-12 · Methodology ↗ · Ranks compare models within each category of the LMArena text leaderboard (style control). Scores come from third-party human preference evaluations, not from OFOX.