This 3D coding test by @thehypedotnews found DeepSeek-V4-Pro-0813 used 48X more tokens than Muse Spark 1.2.

thats why for agentic coding, the model's ability to reach an answer matters almost as much as the answer itself. A model that keeps reopening files, reconsidering decisions, and resending context can turn a small build into a huge inference loop.

The test used Nous Research's Hermes Agent CLI through OpenRouter, identical prompts, and the same Three.js constraints across three voxel-city scenes.

Prompt caching can suppress billing without fixing the latency and retry burden created by a call-heavy agent loop.

- total cost
#1 muse spark 1.2 – $0.53
#2 gemini 3.7 flash – $0.56
#3 deepseek v4 pro – $4.57