2026-05-21 BREAKTHROUGHS☾ PM
Meta releases the full 405 billion parameter Llama 3.1 model with open weights.
📰 THE BRIEF
Meta published complete model weights for Llama 3.1 405B under a permissive license that allows commercial use. Users can download the checkpoint and run inference on a single 8xH100 node or via quantized versions on consumer hardware.
💡 WHY IT MATTERS
Developers learn that frontier-scale performance no longer requires paying per-token API fees or signing restrictive terms. Organizations can now host models internally to retain data sovereignty and eliminate recurring inference costs.
👥 WHO'S DOING IT
Meta AI released the 405B checkpoint on July 23, 2024, and within two weeks the Hugging Face community reported over 1.2 million downloads and fine-tunes achieving 82 percent on MMLU.
⚡ TRY IT
- Visit https://ai.meta.com/blog/meta-llama-3-1/ and accept the license to download the 405B weights.
- Load the model with Hugging Face Transformers and the 4-bit quantization config from bitsandbytes.
- Run a single forward pass on your local GPU to verify tokens-per-second and memory footprint.