Oliver Wehrens

Quick test Qwen3.8 27B

qwen38

One Shot

I finally converted my last server (128GB RAM, RTX 4090) to proxmox. My Nvidia GPU is on passthrough to my LLM VM.

Qwen3.6 powered my podcast news summarizer and my cooking / planning / shopping mobile app (no App Store, just Family Friends, Testflight maybe later).

Now Qwen3.8 came out and I time to put it to a test. Creating different games. It ran at the same speed as Qwen 3.6, ~ 43 tokens / sec, 200k context window. It does think a lot. Reducing the thinking budget might be an option. On the other hand when it runs over night in nightshift, I do not care so much. All examples below are one-shots, one short prompt - one result.

Parameters:


./llama.cpp/build/bin/llama-server \
--model unsloth/Qwen3.8-27B-GGUF/Qwen3.8-27B-UD-Q4_K_XL.gguf \
    -fa on \
    -ngl 99 \
    --threads 8 \
    --cache-type-k q4_0 \
    --cache-type-v q4_0 \
    --batch-size 2048 \
     --ubatch-size 512 \
    --temp 0.25 \
    --mmproj unsloth/Qwen3.8-27B-mmproj-F16.gguf \
    --top-p 0.95 \
    --ctx-size 200000 \
    --top-k 40 \
    --min-p 0.00 \
    --port 8080 --host 0.0.0.0

Games

Tetris Qwen3.8

create a Tetris game in a browser / html

"Tetris"

Play it

Tetris with Opus 5

The same prompt with Opus 5 (High).

"Tetris"

Play it

Flight Simulator Qwen3.8

Build me a flight simulator for a browser / html

"Flight Simulator"

How to fly it

  • Takeoff — hit Start Engine, hold Shift for full throttle. At ~55 kt the nose rotates on its own; ease off and fly.
  • Controls — W/S pitch, A/D roll, Q/E rudder, Shift/Ctrl throttle, Space brake, C cockpit/chase camera, M sound, Esc pause, R restart.

The model is real-ish — below 33 kt you stall (watch the warning and the nose drop), hard landings or water impact destroy the airframe, turns bleed energy, and there’s turbulence above ~2,000 ft. Explore — the world is 16 km of procedural mountains, lakes, forests, and a town east of the field. Clouds sit around 700–1,200 m, so you can fly through them.

Play it

Flappy Bird Qwen 3.8

build a flappty bird games html / browser

In Februray 2025 I tried to create Flappy Bird with DeepSeek 671B Parameter model. Now this works on the 27B model. And it really works. I like to nintendoesk look.

And I’m still bad at it.

"Flappy Bird"

Play it

Coding

Next up setting it up in ‘Oh my Pi’. Wanted to play around with that one for a while.