Muse Spark Open vs DeepSeek V4.1 Flash in Claude Code: what to measure before you pick

Meta released Muse Spark Open weights on 15 October, followed by coding tests against DeepSeek V4.1 Flash on 16 October. In Claude Code, Muse Spark Open responded in 16 seconds but failed to render a working dashboard. Conversely, DeepSeek V4.1 Flash took 2 minutes 29 seconds, utilizing a headless Chrome browser to deliver a functional result. Additionally, tests for DeepSeek V4.1 Flash across four platforms, including XHuoAPI, evaluated its cost and reliability as a coding agent.