What is Z.ai: GLM-5.2's context window?

Z.ai: GLM-5.2 supports a context window of 1,048,576 tokens, allowing you to process large documents and maintain long conversations.

How to use Z.ai: GLM-5.2 API via Ofox?

Simply set your base URL to https://api.ofox.run/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-5.2

Name: Z.ai: GLM-5.2
Brand: z-ai
Price: 1.4 USD
Availability: InStock
Rating: 5 (1 reviews)

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z-ai/glm-5.2

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GLM-5.2 is the flagship reasoning model on Z.ai's international platform (api.z.ai), built on an open-weights MoE architecture with a 1M-token context window. It features embedded thinking (reasoning_content), prompt caching, tool calling, and web search, with strong coding and long-horizon agentic execution. Available via OpenAI-compatible and Anthropic protocols.

Context Window

Max Output Tokens

128K

Released

2026-06-16

Capabilities

Function CallingReasoningPrompt CachingWeb Search

Available Providers

Zhipu

Supported Protocols

openaianthropic

Providers

Zhipu

Input Tokens

$1.4/M

Output Tokens

$4.4/M

Cache Read

$0.26/M

Web Search

$0.01/R

Protocols

openai/v1/chat/completions

anthropic

Code Examples

from openai import OpenAI

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

response = client.chat.completions.create(
    model="z-ai/glm-5.2",
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)

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

Uptime & Status

Benchmarks

LMArena ↗Evaluated as glm-5.2 (max)

Z.ai: GLM-5.2 scores 1464 in the Overall category of the LMArena text leaderboard (style control), ranking #35 of 374 models based on 14,228 human preference votes (updated 2026-07-12).

Benchmark scores for glm-5.2 (max) on LMArena
Category	Arena Score	95% CI	Rank	Votes
Overall	1464	1458–1471	#35 of 374	14,228
Hard Prompts	1487	1480–1494	#32 of 374	9,331
Coding	1511	1501–1521	#33 of 369	3,968
Math	1477	1455–1499	#22 of 362	708
Creative Writing	1443	1431–1455	#38 of 372	2,561
Instruction Following	1461	1452–1470	#29 of 374	4,852
Chinese	1504	1481–1526	#29 of 344	728

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.