DeepSeek · Open weights

DeepSeek V4.1 Flash Uncensored Thinking

Added Oct 1, 2026Open weights

A lower-refusal finetune of DeepSeek V4.1 Flash with text input, optional reasoning, and tool calling. Supports a context window of up to 1M tokens.

Reasoning
Tools

Input: Text
Output: Text
Reasoning effort: none · low · medium · high
Discovery tier: Open weights

Pricing

USD per 1M tokens

Input: $0.33
Output: $1.32
Cache read: $0.0083

Reference prices as published by the model provider. API example

Specifications

Context window: 1M
Max output: 65.5K
Average output (7 days): 797 tokens; Longer than 65% of 465 models

Side by side

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TryQwen3.6 27B TEE Muse Glimmer 30B Gemma 4 31B Agares v1 All 3

Public evaluations

Benchmarks

There are no public benchmark results for DeepSeek V4.1 Flash Uncensored Thinking yet.

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: 437.7 tok/s; Faster than 97% of 250 models
Time to first token: 4.8 s; Quicker than 38% of 250 models
Prompt cache hits: 96.4%; About $0.02 per 1M input tokens with caching
Request success (24h): 92.6%; Unstable

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 27.1%

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": "deepseek/deepseek-v4.1-flash-uncensored:thinking",
    "reasoning_effort": "medium",
    "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="deepseek/deepseek-v4.1-flash-uncensored:thinking",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

DeepSeek

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