Z.ai · Open weights

GLM 5.3 Flash Uncensored

Added Jul 29, 2026Open weights

GLM 5.3 Flash Uncensored is an uncensored fine-tune of the efficient 320B mixture-of-experts reasoning model with provider-dependent vision support, built for unrestricted chat, creative writing, coding, agentic work, tool use, and long-context tasks.

Reasoning
Tools
Vision
Structured output

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

Pricing

USD per 1M tokens

Input: $0.20
Output: $0.80
Cache read: $0.07

Reference prices as published by the model provider. API example

Specifications

Context window: 1M
Max output: 32.8K
Average output (7 days): 692 tokens; Longer than 61% of 468 models

Side by side

Compare models

Put GLM 5.3 Flash Uncensored next to up to three other models. The comparison stays in the link, so you can share it.

TryQwen3.6 35B A3B TEE Step 3.7 Flash Thinking Ministral 14B All 3

Public evaluations

Benchmarks

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

#17Combined8.5%

Ranks among Noumen catalog models on Combined 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: 208.6 tok/s; Faster than 85% of 253 models
Time to first token: 2.9 s; Quicker than 58% of 253 models
Prompt cache hits: 92.0%; About $0.0804 per 1M input tokens with caching
Request success (24h): 99.8%; 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 98.9%

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

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