opus 5 vs kimi k3 vs muse spark 1.2 – one shopping mall, day and night, in three.js

scenes: a frutiger aero mall at opening hour, and the same mall hours after closing. one camera walk each, 3,600 frames per cut. muse needed a stronger day prompt, opus a hand-fix on the day lights, muse another on the night lights

the setup: streamed straight off @OpenRouter, no agent loop, no tools, no filesystem – one prompt in, one javascript fule out. the camera, the timer and the render loop are ours and identical for all three, so the same 60-second walk runs through every world. the day prompt and the night prompt are one file with two paragraphs swapped

models: @AnthropicAI claude opus 5, @Kimi_Moonshot kimi k3, @AIatMeta muse spark 1.2

- total time to answer, two scenes
#1 muse spark 1.2 – 6m 08s
#2 claude opus 5 – 35m 37s
#3 kimi k3 – 76m 56s

- total output tokens
#1 muse spark 1.2 – 30,280
#2 kimi k3 – 134,603
#3 claude opus 5 – 172,353

- total price
#1 muse spark 1.2 – $0.135
#2 kimi k3 – $2.021
#3 claude opus 5 – $4.345

- lines shipped
#1 claude opus 5 – 2,461
#2 kimi k3 – 1,754
#3 muse spark 1.2 – 1,289

- draw commands the gpu gets per frame, peak
#1 kimi k3 – 221
#2 claude opus 5 – 554
#3 muse spark 1.2 – 2,969

observations:

• muse punches far above its price. $0.135 and 6m 08s for both scenes, against $4.345 and 35m 37s from opus – 32x cheaper, 6x faster, and per output token it runs $0.0045 against opus's $0.0252. by day it holds the frame next to models that cost thirty times more

• cheapest to generate, most expensive to play: muse draws 3,036 calls a frame against kimi's 223, and it is the panel that stalls the browser

• kimi thinks the longest and answers the slowest. 49m 30s on the night scene alone, 106k reasoning tokens across the two – and it is the only one of the three whose code we never touched

• opus lit the day mall with two fill lights almost as strong as the sun, and never asked for a single shadow – so nothing in the room cast one, and the picture flattened into white. kimi kept its sun five times stronger than the fill and left shadows on. by night opus did it right on its own, unprompted: the darkest picture of the three

• we hand-fixed two panels: opus by day, muse by night, lights only, both originals kept

the six scenes in the video cost $6.50, and 16 runs and $8.54 to get there. meta muse did 9 of those runs, and its final two took 6m 08s and 13.5 cents – which, at that time and that price, is a result!

watch the full test via link