Z.ai · Efficient

GLM-4 Long

Added Jan 1, 2024

Use in the app

Extended context model supporting up to 1M tokens

Input: Text
Output: Text
Discovery tier: Efficient

Pricing

USD per 1M tokens

Input: $0.20
Output: $0.20

Reference prices as published by the model provider. API example

Specifications

Context window: 1M
Max output: 4.1K
Average output (7 days): 252 tokens; Longer than 26% of 468 models

Side by side

GLM-4 Long compared

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

Limits
	GLM-4 LongZ.aiThis model	GLM 5.3 UncensoredZ.aiRemove
Provider	Z.ai	Z.ai
Discovery tier	Efficient	Open weights
Added	Jan 1, 2024	Sep 26, 2026
Context window	1M	1.05MBest
Max output	4.1K	131.07KBest
Average output	252 tokens	1.1K tokens
Pricing, USD per 1M tokens
Input	$0.20Best	$1.25
Output	$0.20Best	$2.25
Cache read	—	$0.30
Performance
Throughput	—	38.9 tok/s
Time to first token	—	26.2 s
Request success (24h)	—	98.8%
Capabilities
Reasoning	No	Yes
Tools	No	Yes
Reasoning effort	—	low, high, max

Public evaluations

Benchmarks

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

GLM-4 Long
GLM 5.3 Uncensored

Leaderboard	GLM-4 Long	GLM 5.3 Uncensored
Usage Share	Not in top 20	#8 · 4.8%

Ranks among Noumen catalog models on Usage leaderboards. Only top-20 placements are listed.

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": "glm-4-long",
    "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="glm-4-long",
    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.