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Qwen3.8-27B model shows significant performance gains with 'x-high' reasoning effort setting

A user on Reddit's r/LocalLLaMA community has conducted an informal comparison of the Qwen3.8-27B model's performance across different "reasoning effort" settings. The tests indicate that the "x-high" setting significantly increases visual fidelity in generated SVGs, producing results rated higher in quality, but at a cost of approximately seven times longer generation time compared to the "low" setting. The "low" and "medium" settings showed similar performance in terms of speed and output quality, while "x-high" resulted in a dramatically higher number of reasoning tokens. AI

IMPACT Higher reasoning effort settings in models like Qwen3.8-27B can lead to improved output quality at the cost of significantly increased processing time, influencing user choices for specific tasks.

RANK_REASON User-conducted benchmark of an open-source model's parameter tuning.

Read on r/LocalLLaMA →

AI-generated summary · Google Gemini · from 3 sources. How we write summaries →

Qwen3.8-27B model shows significant performance gains with 'x-high' reasoning effort setting

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User-conducted benchmark of an open-source model's parameter tuning.
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COVERAGE [3]

  1. r/LocalLLaMA TIER_1 English(EN) · /u/alanoo ·

    Why no "high" reasoning effort in Qwen 3.8 27b ?

    <!-- SC_OFF --><div class="md"><p>The gap between &quot;medium&quot; and the default &quot;xhigh&quot; is ridiculously huge. Medium barely thinks, xhigh... well there has already been many posts about that.</p> <p>The naming itself seems to point out that there should have been a…

  2. r/LocalLLaMA TIER_1 English(EN) · /u/Danmoreng ·

    Qwen3.8 27B reasoning effort low/medium/xhigh comparison

    <table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1vpuh7m/qwen38_27b_reasoning_effort_lowmediumxhigh/"> <img alt="Qwen3.8 27B reasoning effort low/medium/xhigh comparison" src="https://preview.redd.it/fkbx5qf41qjh1.png?width=140&amp;height=113&amp;auto=webp&a…

  3. r/LocalLLaMA TIER_1 English(EN) · /u/SarcasticBaka ·

    The difference between "medium" and "xhigh" reasoning effort for Qwen3.8-27B is actually insane.

    <!-- SC_OFF --><div class="md"><p>I'm currently testing out Qwen3.8-27B using Unsloth's UD-Q4_K_XL running a freshly rebuilt llama.cpp. I have a 22GB RTX 2080TI on which I'm able to fit 100k context with q8_0 quantization, and using MTP with --spec-draft-n-max 4 I get about 40tk/…