Meta Replaces Llama With Muse Spark AI, Launches Contemplating Mode

Meta has officially discontinued its Llama model line and unveiled Muse Spark as its flagship AI system, signaling a strategic shift in the company's AI division under Meta Superintelligence Labs.

Muse Spark Availability and Positioning

Muse Spark is now available today in Meta AI applications. The company describes it as "the first step on our scaling ladder" for a family of Muse models that will follow. Unlike Anthropic's recent Claude Mythos Preview announcement, which remains in limited testing, Muse Spark has immediate public availability.

Meta positions Muse Spark as a direct competitor to frontier models from other labs. According to Meta, the model offers "competitive performance in multimodal perception, reasoning, health, and agentic tasks." The company acknowledges current performance gaps in long-horizon agentic systems and coding workflows.

Contemplating Mode: Parallel Reasoning Architecture

Muse Spark includes two primary reasoning modes. The base "Thinking" mode benchmarks favorably against Anthropic's Claude Opus 4.6 Max, Google's Gemini 3.1 Pro High, OpenAI's GPT-5.4 Xhigh, and xAI's Grok 4.2 Reasoning models.

Meta's Contemplating mode represents a more significant capability leap, orchestrating multiple agents that reason in parallel. This architecture directly competes with Gemini 3.1 Deep Think and GPT-5.4 Pro. According to Meta, Contemplating mode achieves 58% on Humanity's Last Exam and 38% on FrontierScience Research benchmarks. The company notes this mode will roll out gradually.

Specialized Health Capabilities

Meta has invested significant resources in health-focused reasoning. The company collaborated with over 1,000 physicians to curate training data for medical accuracy. Muse Spark can generate interactive displays explaining health information including nutritional content and exercise physiology.

The model demonstrates multimodal strengths in visual STEM questions, entity recognition, and localization tasks.

API Access and Strategic Timing

Meta is opening a private API preview for select partners alongside the public release. The announcement comes as major AI labs release increasingly capable reasoning models, with Meta positioning Muse as a foundational competitor in this space.

The transition from Llama to Muse represents Meta's pivot toward a unified superintelligence approach under Alexandr Wang's leadership of Meta Superintelligence Labs.

What This Means

Meta's full departure from Llama signals the completion of its shift from open-source model distribution to closed-API commercial deployment. The emphasis on health applications and parallel reasoning agents indicates Meta is targeting enterprise and healthcare verticals beyond general-purpose chat. Contemplating mode's gradual rollout suggests the company is managing compute costs while establishing performance baselines against competitors' reasoning models.