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Z.ai · Open weights

GLM 4.6 Original

Added Dec 11, 2025Open weights

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Use in the app

GLM-4.6, Zhipu's flagship text model with 256K context window and advanced reasoning capabilities. Direct via Z-AI (Zhipu).

  • Reasoning
  • Tools
Input
Text
Output
Text
Discovery tier
Open weights

Pricing

USD per 1M tokens
Input
$0.50
Output
$2.00
Cache read
$0.10

Reference prices as published by the model provider. API example

Specifications

Context window
256K
Max output
65.5K
Average output (7 days)
1.3K tokens
Longer than 81% of 468 models

Side by side

GLM 4.6 Original compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

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GLM 4.6 OriginalZ.aiThis modelGLM 5 OriginalZ.aiRemove
ProviderZ.aiZ.ai
Discovery tierOpen weightsOpen weights
AddedDec 11, 2025Feb 11, 2026
Limits
Context window256KBest200K
Max output65.54K128KBest
Average output1.3K tokens250 tokens
Pricing, USD per 1M tokens
Input$0.50Best$0.60
Output$2.00$1.90Best
Cache read$0.10$0.10
Performance
Request success (24h)99.4%99.7%Best
Benchmark indexes
Intelligence Index14.927.9Best
Math Index44.3—
Capabilities
ReasoningYesYes
ToolsYesYes
Structured outputNoYes
Reasoning effort——

Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

  • GLM 4.6 Original
  • GLM 5 Original

Intelligence Index

  • GLM 4.6 Original14.9
  • GLM 5 Original27.9

GLM 4.6 Original: Better than 37% of 326 scored models

3.8Catalog models by score55.1

Indexes

  • Math Index

    Composite of the math evaluations

    • GLM 4.6 Original: 44.3
    • GLM 5 Original: —

Document reasoning

  • AA-LCRv1.1

    Reasoning across long documents

    • GLM 4.6 Original: 26.3%
    • GLM 5 Original: 75.7%Top

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • GLM 4.6 Original: 5.5%
    • GLM 5 Original: 29.3%Top

  • GPQA Diamond

    Graduate-level science questions

    • GLM 4.6 Original: 63.2%
    • GLM 5 Original: 82.0%Top

  • MMLU-Pro

    Multi-subject knowledge and reasoning

    • GLM 4.6 Original: 78.4%
    • GLM 5 Original: —

  • IFBench

    Following precise output instructions

    • GLM 4.6 Original: 36.7%
    • GLM 5 Original: 72.3%Top

Coding

  • LiveCodeBench

    Recent competitive programming problems

    • GLM 4.6 Original: 56.1%
    • GLM 5 Original: —

Math

  • AIME 2025

    Competition mathematics, 2025 problems

    • GLM 4.6 Original: 44.3%
    • GLM 5 Original: —

Legacy evaluations

  • Terminal-Bench Hard

    Earlier terminal task suite

    • GLM 4.6 Original: 28.8%
    • GLM 5 Original: 43.2%Top

  • τ²-Bench Telecom

    Tool use in a customer-support simulation

    • GLM 4.6 Original: 76.9%
    • GLM 5 Original: 98.2%Top

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • GLM 4.6 Original: 26.3%
    • GLM 5 Original: 75.7%Top

Scores from Artificial Analysis, updated Oct 26, 2026. Artificial Analysis

Live routing data

Performance and reliability

Recent averages across requests routed for this model. Your own speed depends on prompt length, reasoning effort and load.

Prompt cache hits
24.4%
About $0.40 per 1M input tokens with caching
Request success (24h)
99.4%
Reliable

Cache hits are the share of input tokens recently served from a prompt cache across all requests. They are not a forecast of your own hit rate.

Hourly request success · last 72 hoursLowest hour 97.3%
  • Healthy (98% or more)
  • Degraded (90–98%)
  • Down (under 90%)
  • No requests

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart
curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "z-ai/glm-4.6-original",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'
import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="z-ai/glm-4.6-original",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

Z.ai

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