Model reference · open weights

Llama-4-Scout-16E

LLMs meta-llama Vision + text 3 builds Its own licence terms 247k dl/mo

Llama-4-Scout-16E is an open-weight language model from Meta. Llama-4-Scout-17B-16E-Instruct-quantized.w4a16 (INT4) weighs 64.9 GB; the smallest configuration that runs it is H100 80 GB.

  • Llama-4-Scout-16E is a natively multimodal model developed by Meta that uses a mixture-of-experts architecture for text and image understanding.
  • It is intended for commercial and research use in assistant-like chat, visual reasoning, and captioning tasks.
  • The model contains 108.6 billion parameters and supports 12 languages, including Arabic, English, and Spanish, under a custom commercial license.

Summary of the meta-llama/Llama-4-Scout-17B-16E-Instruct model card, 2026-10-01. The estimate below is for another build of the family.

What it is

Released byMeta
Released2025-04-02
Parameters108.6B
VRAM64.9 GB for the weights

What it runs on

Memory and cards for Llama-4-Scout-17B-16E-Instruct-quantized.w4a16 (INT4)

64.9 GBweights, file size
197 MBcache per 1K tokens
2.1 GBruntime overhead, at least
10,485,760 tokenscontext max
CardRequests at onceContext maxMemory
8K each32K each
RTX 3060 12 GB … L40S 48 GB
6 smaller cards
———
A100 80 GB6155K78.2 GB
H100 80 GB3—31K78.1 GB
RTX PRO 6000 Blackwell 96 GB133109K93.8 GB
DGX Spark (GB10) 128 GB unified225176K107 GB
H200 141 GB4110328K138 GB
B200 180 GB6416515K176 GB
2× L40S 48 GB
tensor parallel
11293K44.0 GB a card
4× RTX 4090 24 GB
tensor parallel
123100K23.4 GB a card
4× RTX 3090 24 GB
tensor parallel
123101K23.4 GB a card
4× RTX 5090 32 GB
tensor parallel
317252K31.0 GB a card
2× H100 80 GB
tensor parallel
4812384K78.1 GB a card
2× A100 80 GB
tensor parallel
5413433K78.2 GB a card
Memory needed at each load
Requests at once8K tokens each32K tokens each
168.6 GB73.4 GB
575.0 GB99.2 GB
879.8 GB118 GB
1692.7 GB170 GB
32118 GB273 GB
64170 GB479 GB

One card, with vLLM's small-card settings.

Builds

Sizes, precisions & builds

BuildParamsPrecisionWeightsSmallest setup
Llama-4-Scout-17B-16E-Instruct ↗ 108.6BBF16 217 GBnone of the reference configurations
Llama-4-Scout-17B-16E-Instruct-GGUF ↗
packaged by unsloth
27 builds: TQ1_0 29.3 GB … BF16 216 GB
—GGUF 65.4 GBH100 80 GB
Llama-4-Scout-17B-16E-Instruct-quantized.w4a16 (above) ↗
packaged by RedHatAI
109.4BINT4 64.9 GBH100 80 GB

From the model card

What Meta says about Llama-4-Scout-16E

Read the model card
MoE BitsTypeDisk SizeHF LinkAccuracy
1.78bitIQ1_S33.8GBLinkOk
1.93bitIQ1_M35.4GBLinkFair
2.42-bitIQ2_XXS38.6GBLinkBetter
2.71-bitQ2_K_XL42.2GBLinkSuggested
3.5-bitQ3_K_XL52.9GBLinkGreat
4.5-bitQ4_K_XL65.6GBLinkBest

Currently text only is supported.

Chat template/prompt format:

🦙 Fine-tune Meta's Llama 4 with Unsloth!

  • Fine-tune Llama-4-Scout on a single H100 80GB GPU using Unsloth!
  • Export your fine-tuned model to GGUF, Ollama, llama.cpp, vLLM or 🤗HF.

Llama 4 Model Information

The Llama 4 collection of models are natively multimodal AI models that enable text and multimodal experiences. These models leverage a mixture-of-experts architecture to offer industry-leading performance in text and image understanding.

These Llama 4 models mark the beginning of a new era for the Llama ecosystem. We are launching two efficient models in the Llama 4 series, Llama 4 Scout, a 17 billion parameter model with 16 experts, and Llama 4 Maverick, a 17 billion parameter model with 128 experts.

Model developer: Meta

Model Architecture: The Llama 4 models are auto-regressive language models that use a mixture-of-experts (MoE) architecture and incorporate early fusion for native multimodality.

    109B (Total)
    400B (Total)

Supported languages: Arabic, English, French, German, Hindi, Indonesian, Italian, Portuguese, Spanish, Tagalog, Thai, and Vietnamese.

Model Release Date: April 5, 2025

Status: This is a static model trained on an offline dataset. Future versions of the tuned models may be released as we improve model behavior with community feedback.

License: A custom commercial license, the Llama 4 Community License Agreement, is available at: https://github.com/meta-llama/llama-models/blob/main/models/llama4/LICENSE

Where to send questions or comments about the model: Instructions on how to provide feedback or comments on the model can be found in the Llama README. For more technical information about generation parameters and recipes for how to use Llama 4 in applications, please go here.

Intended Use

Intended Use Cases: Llama 4 is intended for commercial and research use in multiple languages. Instruction tuned models are intended for assistant-like chat and visual reasoning tasks, whereas pretrained models can be adapted for natural language generation. For vision, Llama 4 models are also optimized for visual recognition, image reasoning, captioning, and answering general questions about an image. The Llama 4 model collection also supports the ability to leverage the outputs of its models to improve other models including synthetic data generation and distillation. The Llama 4 Community License allows for these use cases.

Out-of-scope: Use in any manner that violates applicable laws or regulations (including trade compliance laws). Use in any other way that is prohibited by the Acceptable Use Policy and Llama 4 Community License. Use in languages or capabilities beyond those explicitly referenced as supported in this model card**.

**Note:

1. Llama 4 has been trained on a broader collection of languages than the 12 supported languages (pre-training includes 200 total languages). Developers may fine-tune Llama 4 models for languages beyond the 12 supported languages provided they comply with the Llama 4 Community License and the Acceptable Use Policy. Developers are responsible for ensuring that their use of Llama 4 in additional languages is done in a safe and responsible manner.

2. Llama 4 has been tested for image understanding up to 5 input images. If leveraging additional image understanding capabilities beyond this, Developers are responsible for ensuring that their deployments are mitigated for risks and should perform additional testing and tuning tailored to their specific applications.

How to use with transformers

Please, make sure you have transformers v4.51.0 installed, or upgrade using pip install -U transformers.

from transformers import AutoProcessor, Llama4ForConditionalGeneration
import torch

model_id = "meta-llama/Llama-4-Scout-17B-16E-Instruct"

processor = AutoProcessor.from_pretrained(model_id)
model = Llama4ForConditionalGeneration.from_pretrained(
    model_id,
    attn_implementation="flex_attention",
    device_map="auto",
    torch_dtype=torch.bfloat16,
)

url1 = "https://huggingface.co/datasets/huggingface/documentation-images/resolve/0052a70beed5bf71b92610a43a52df6d286cd5f3/diffusers/rabbit.jpg"
url2 = "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/datasets/cat_style_layout.png"
messages = [
    {
        "role": "user",
        "content": [
            {"type": "image", "url": url1},
            {"type": "image", "url": url2},
            {"type": "text", "text": "Can you describe how these two images are similar, and how they differ?"},
        ]
    },
]

inputs = processor.apply_chat_template(
    

Quoted from the model card on Hugging Face. The full card is behind the Hugging Face link above.

How it works

How language models work

Your prompttext / messagesTransformerattention over tokensNext-token loopgenerate + streamResponsetext · tool callsA language model reads your tokens and predicts the next one, again and again, streaming the reply back.
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