Meta Llama 4 Behemoth
Last Updated on: Sep 12, 2025
Meta Llama 4 Behemoth
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What is Meta Llama 4 Behemoth?
Llama 4 Behemoth is Meta’s ultimate “teacher” model within the Llama 4 series, currently in preview and training. Featuring an enormous 2 trillion total parameters with 288 billion active in a Mixture-of-Experts architecture (16 experts), it's designed to push the limits of multimodal reasoning, STEM, and long-context tasks. Initially slated for April 2025, its release has been postponed to fall 2025 or later due to internal performance and alignment concerns.
Who can use Meta Llama 4 Behemoth & how?
  • Researchers & AI Labs: Ideal for developing next-gen models, complex reasoning, and cutting-edge experiments.
  • Enterprises: Intended as backend infrastructure to train or fine-tune distilled models (like Maverick) at scale.
  • Developers & Engineers: Access via cloud or platform partnerships once released, especially for high-stakes AI workflows.
  • Academia: Enables study of ultra-large model behavior, multimodal fusion, and teacher-student distillation.
  • Cloud Providers: Will power backend systems and provide inference/dataset services for other models.

How to Use Llama 4 Behemoth?
  • Still in Training: It's currently undergoing safety, alignment, and performance refining—unavailable publicly.
  • Distillation Role: Used internally to train and improve smaller Llama 4 models like Maverick and Scout.
  • Awaiting Release: Public access may be via select cloud platforms or research collabs once performance and reliability are verified.
  • Upcoming Features: Expected to offer multimodal, long-context (1–2 million tokens or more), and top-tier reasoning capabilities.
What's so unique or special about Meta Llama 4 Behemoth?
  • Massive Scale: 2 trillion parameters—one of the largest MoE-based language models ever built.
  • STEM Benchmark Leader: Internal performance shows 95% on MATH-500, 82% GPQA Diamond, ~85.8% multilingual MMLU—surpassing existing flagship models.
  • Teacher Backbone: Powers the development and fine-tuning of smaller, deployable Llama 4 models.
  • Potentially Unmatched Context: Expected to support 1–2 million-token or larger context windows.
  • Cautious Rollout: Meta is delaying public release to ensure strong alignment, performance consistency, and readiness for enterprise standards.
Things We Like
  • Record-breaking scale and internal performance on STEM/multilingual benchmarks
  • Serves as a powerful teacher model to enhance smaller Llama models
  • Expected to support ultra-long context and multimodality
  • Will be available via select cloud/research platforms when ready
Things We Don't Like
  • Still unreleased—delayed to fall 2025 or later
  • Operationally expensive and infrastructure-heavy, limiting early access
  • Internal performance gaps and scale complexities have raised concerns
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FAQs

Meta’s flagship teacher model in Llama 4 with 2 T parameters and 288 B active, designed for deep reasoning and multimodality—still in training, release expected this fall or later.
Because of internal performance shortfalls, safety/alignment tuning, and questions around the value of further scale.
MATH‑500 (95%), GPQA Diamond (82%), multilingual MMLU (~85.8%)—outperforming GPT‑4.5, Claude 3.7, Gemini 2 Pro.
As a teacher model to train smaller Llama versions and eventually power large-scale inference in research and enterprise by cloud/regional partners.
Likely 1–2 million tokens—enabling ultra-long document, code, or multimodal workflows.

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