Z.ai · Open weights

GLM 5.3 Uncensored

Added Sep 26, 2026Open weights

An experimental uncensored version of the full GLM 5.3 reasoning model for chat, creative writing, coding, and tool use. It may show unusual behavior or inconsistent response quality.

Reasoning
Tools

Input: Text
Output: Text
Reasoning effort: low · high · max
Discovery tier: Open weights

Pricing

USD per 1M tokens

Input: $1.25
Output: $2.25
Cache read: $0.30

Reference prices as published by the model provider. API example

Specifications

Context window: 1M
Max output: 131.1K
Average output (7 days): 1.1K tokens; Longer than 74% of 465 models

Side by side

GLM 5.3 Uncensored compared

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

Limits
	GLM 5.3 UncensoredZ.aiThis model	GLM 5.3 Flash CybersecurityZ.aiRemove
Provider	Z.ai	Z.ai
Discovery tier	Open weights	Open weights
Added	Sep 26, 2026	Sep 19, 2026
Context window	1.05M	1.05M
Max output	131.07KBest	32.77K
Average output	1.1K tokens	417 tokens
Pricing, USD per 1M tokens
Input	$1.25	$0.15Best
Output	$2.25	$0.50Best
Cache read	$0.30	$0.075Best
Performance
Throughput	37.0 tok/sBest	13.3 tok/s
Time to first token	7.6 s	6.7 sBest
Request success (24h)	98.8%Best	96.1%
Capabilities
Reasoning	Yes	Yes
Tools	Yes	Yes
Vision	No	Yes
Reasoning effort	low, high, max	low, high, max

Public evaluations

Benchmarks

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

GLM 5.3 Uncensored
GLM 5.3 Flash Cybersecurity

Leaderboard	GLM 5.3 Uncensored	GLM 5.3 Flash Cybersecurity
Usage Share	#8 · 4.8%	Not in top 20

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

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.

Throughput: 37.0 tok/s; Faster than 27% of 251 models
Time to first token: 7.6 s; Quicker than 19% of 251 models
Prompt cache hits: 94.7%; About $0.35 per 1M input tokens with caching
Request success (24h): 98.8%; 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 90.1%

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-5.3-uncensored",
    "reasoning_effort": "low",
    "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-5.3-uncensored",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

Z.ai

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