Same prompt, two local MoEs: V8 engine demos

The DeepSeek V4.1 Flash build: a V8 engine on a test stand, rendered in Three.js — **DeepSeek V4.1 Flash, UD-IQ1_M**

The Qwen 3.8 FN build: a V8 engine on a test stand, rendered in Three.js — **Qwen 3.8 FN, NVFP4**

Side by side

DeepSeek V4.1 FlashQwen 3.8 FN

Cutaway

Exploded view

Part inspection

The runs

How each run went.

Both runs were local on Basalt. The setups differ, so read each column as its own run.
Metric	DeepSeek V4.1 Flash	Qwen 3.8 FN
Quant	UD-IQ1_M	NVFP4
Agents	1	orchestrator + 5 subagents, up to 3 at once
Wall time	~60 min	~72 min
Tokens generated	250k	443k+ (orchestrator only)
Decode speed	94 tok/s	~350 tok/s combined (125 per request)
Peak context	346k, never compacted	262k window, compacted twice
Avg time to first token	3.0 s	0.99 s

The prompt

Let's build a V8 engine.

A stunning, fully interactive 3D simulation of a 90-degree V8 on an industrial
engine test stand, in Three.js/WebGL, running in the browser.

Eight cylinders in two banks of four, cross-plane, with visible pistons, rods,
crankshaft, camshafts and valves.
Detailed heads, intake, exhaust headers, bolts and pipework.
Realistic PBR metals.
Real, synchronised animation: pistons driven off the crank, cams turning at
half crank speed, and a full four-stroke valve sequence.
An RPM slider from 0 to 4 000, plus slow motion.
WASD plus mouse walking, orbit, and smooth zoom.
Working controls: START / STOP, RPM CONTROL, CUTAWAY, EXPLODED VIEW, ASSEMBLE,
PART INSPECTION, RESET CAMERA.
Procedural geometry only — no downloaded models.
Every control functional, and nothing floating apart.

The builds bundle three.js (MIT license) and are shown as the models produced them.