开源权重周报：M3.1 Flash 与 DeepSeek V4.1 Flash 同价，Space Bunny 身份揭晓
盘点本周开源权重模型：M3.1 Flash 与 DeepSeek V4.1 Flash 同为 $0.15/$0.60（后者高峰翻倍、M3.1 全天平价），并提到早期匿名版即 Space Bunny；作者另用 50 个真实 PR 测了 Meta Muse Spark Open。
Open weights had a loud week. China and the US both shipped. China: → DeepSeek V4.1 Flash at $0.15 / $0.60 per 1M tokens off-peak (weekday peak doubles it) → MiniMax M3.1 Flash at the same list price, flat 24/7. An early version ran anonymously as Space Bunny. US: → NVIDIA Nemotron 3.5 Super VL, a 120B MoE that activates 12B, multimodal for agents → Reflection Beam, a 501B MoE with 23B active, Apache 2.0 → Meta Muse Spark Open, the open reviewer model I didn't race the Flash models on a leaderboard. I gave Muse Spark Open 50 real merged PRs from 9 OSS repos on Token Factory: 25 later reverted, 25 clean. It caught 12 of the 25 bad ones. 8 of those 12 reproduced when I ran the code. Same week. Different jobs. Flash models race on price and speed. Muse had to catch bugs humans already shipped. My full Muse Spark Open benchmark is below
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