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GLM 4.5 Air (Thinking)

Added Jan 1, 2024Open weights

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Use in the app

GLM-4.5-Air with thinking mode enabled for enhanced reasoning capabilities. Shows step-by-step thought process.

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

Pricing

USD per 1M tokens
Input
$0.13
Output
$0.85
Cache read
$0.025

Reference prices as published by the model provider. API example

Specifications

Context window
128K
Max output
98.3K
Average output (7 days)
973 tokens
Longer than 70% of 465 models

Side by side

GLM 4.5 Air (Thinking) compared

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

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GLM 4.5 Air (Thinking)Z.aiThis modelQwen3 Next 80B A3B (Thinking)QwenRemove
ProviderZ.aiQwen
Discovery tierOpen weightsOpen weights
AddedJan 1, 2024Jan 1, 2024
Limits
Context window128K256KBest
Max output98.3KBest32.77K
Average output973 tokens—
Pricing, USD per 1M tokens
Input$0.13Best$0.15
Output$0.85$0.65Best
Cache read$0.025—
Performance
Request success (24h)100.0%—
Benchmark indexes
Intelligence Index11.111.2Best
Coding Index—17.4
Math Index80.784.3Best
Capabilities
ReasoningYesNo
ToolsYesNo
Structured outputYesNo
Reasoning effort——

Public evaluations

Benchmarks

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

  • GLM 4.5 Air (Thinking)
  • Qwen3 Next 80B A3B (Thinking)

Intelligence Index

  • GLM 4.5 Air (Thinking)11.1
  • Qwen3 Next 80B A3B (Thinking)11.2

GLM 4.5 Air (Thinking): Better than 23% of 326 scored models

3.8Catalog models by score55.1

Indexes

  • Coding Index

    Composite of the coding evaluations

    • GLM 4.5 Air (Thinking): —
    • Qwen3 Next 80B A3B (Thinking): 17.4

  • Math Index

    Composite of the math evaluations

    • GLM 4.5 Air (Thinking): 80.7
    • Qwen3 Next 80B A3B (Thinking): 84.3Top

Agentic work

  • GDPval-AAv2.1

    Economically valuable occupational tasks, rated head to head

    • GLM 4.5 Air (Thinking): —
    • Qwen3 Next 80B A3B (Thinking): 128 Elo

Document reasoning

  • AA-LCRv1.1

    Reasoning across long documents

    • GLM 4.5 Air (Thinking): 46.7%
    • Qwen3 Next 80B A3B (Thinking): 63.7%Top

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • GLM 4.5 Air (Thinking): 7.0%
    • Qwen3 Next 80B A3B (Thinking): 12.6%Top

  • GPQA Diamond

    Graduate-level science questions

    • GLM 4.5 Air (Thinking): 73.3%
    • Qwen3 Next 80B A3B (Thinking): 75.9%Top

  • MMLU-Pro

    Multi-subject knowledge and reasoning

    • GLM 4.5 Air (Thinking): 81.5%
    • Qwen3 Next 80B A3B (Thinking): 82.4%Top

  • IFBench

    Following precise output instructions

    • GLM 4.5 Air (Thinking): 37.6%
    • Qwen3 Next 80B A3B (Thinking): 60.7%Top

Coding

  • LiveCodeBench

    Recent competitive programming problems

    • GLM 4.5 Air (Thinking): 68.4%
    • Qwen3 Next 80B A3B (Thinking): 78.4%Top

Math

  • AIME 2025

    Competition mathematics, 2025 problems

    • GLM 4.5 Air (Thinking): 80.7%
    • Qwen3 Next 80B A3B (Thinking): 84.3%Top

  • AIME

    Competition mathematics

    • GLM 4.5 Air (Thinking): 67.3%
    • Qwen3 Next 80B A3B (Thinking): —

  • MATH-500

    Competition math problems

    • GLM 4.5 Air (Thinking): 96.5%
    • Qwen3 Next 80B A3B (Thinking): —

Legacy evaluations

  • Terminal-Bench Hard

    Earlier terminal task suite

    • GLM 4.5 Air (Thinking): 20.5%Top
    • Qwen3 Next 80B A3B (Thinking): 9.8%

  • τ²-Bench Telecom

    Tool use in a customer-support simulation

    • GLM 4.5 Air (Thinking): 46.5%Top
    • Qwen3 Next 80B A3B (Thinking): 41.5%

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • GLM 4.5 Air (Thinking): 46.7%
    • Qwen3 Next 80B A3B (Thinking): 63.7%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
36.0%
About $0.0922 per 1M input tokens with caching
Request success (24h)
100.0%
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 100.0%
  • 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-4.5-Air:thinking",
    "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-4.5-Air:thinking",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

Z.ai

Other Z.ai models, starting with the same family.