Meta just graduated to the "Big Kid Table." After the middling reception of Llama 4 Maverick, Mark Zuckerberg is firing back with Muse Spark, a closed-source, multi-agent powerhouse designed to take on GPT-5.4. Plus, a new open-source king, GLM-5.1, just proved that AI can now handle 8-hour autonomous coding marathons without losing its mind.

We’ll talk about:

• Meta’s Muse Spark: Why the "Open AI" darling is going closed-source and how its new orchestration layer puts it in the global Top 5.
• The 8-Hour Workflow: Inside GLM-5.1, the new open-source model that crushes SWE-Bench Pro and can build entire Linux apps in a single session.
• The Claude "Speed Hack": Why a controversial trick to make Claude faster is going viral and the ethical debate it's sparking.
• HappyHorse-1.0: The mystery video model that just swiped the #1 spot on the Artificial Analysis rankings.
• Anthropic’s "Project Glasswing": How the new "Mythos" model exposed thousands of vulnerabilities and what companies are doing to stay safe.

Keywords: Meta Muse Spark, GLM-5.1, HappyHorse AI, Anthropic Mythos, Open-Source AI.

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