Meta 发布 Muse Spark Open：目前最强的美国开源权重模型
Meta 放出了 Muse Spark Open，816B 总参数里只有 42B 激活，跑 Code Arena 拿了美国开源第一，价格还比 Muse Wonder 便宜近八成。
AI at Meta 发布 Muse Spark Open，定位为目前最强的美国开源权重模型，主打编程与智能体任务。模型总参数 816B、激活 42B，上下文窗口 1M token，原生支持文本、图像、视频、音频多模态。在 Code Arena: WebDev 排行榜上，它以 1511 分位列美国开源模型第一、全部开源模型第 13 名，比 Meta 上一款开源模型 Muse Glimmer（1355 分）高出 156 分。定价为每百万输入/输出 token $1.25/$4.25，比 Muse Wonder (Max) 便宜 79%。
Exciting news: Muse Spark Open (Max) by @AIatMeta is the #1 US open model in the Code Arena: WebDev! With 1511 pts, it’s #13 among open models overall. As the first open-weight release in the Muse Spark family, it scored 156 pts above Muse Glimmer, @AIatMeta ’s earlier open model at #41 among open models with 1355 pts. Priced at $1.25/$4.25 per 1M input/output tokens, it’s 79% less than Muse Wonder (Max) and priced on par with Muse Spark 1.3 (Max). By domain, Muse Spark Open (Max) ranks: - #13 in Brand & Marketing, and in Data & Analytics - #14 in Reference-Based Design - #15 Gaming, and in Consumer Product - #20 in Simulations Congrats to the team at @AIatMeta on this contribution to the open ecosystem! AI at Meta @AIatMeta Today we’re releasing Muse Spark Open, the most capable US open-weight model to date. Built for coding and agentic work, it excels at long-horizon tasks, complex software engineering, and multi-step reasoning. Key Model Specs: → 816B total / 42B active parameters → 1M token context window → Natively multimodal across text, image, video, audio 🔗 View Quoted Tweet 💬 10 🔄 3 ❤️ 36 👀 4539 📊 11 ⚡
