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Llama 4 Scout

Meta | 1,310,720 token context | $0.18/M input, $0.59/M output. Llama 4 Scout 17B Instruct (16E) is a mixture-of-experts (MoE) language model developed by Meta, activating 17 billion parameters out of a total of 109B. It supports native multimodal input (text and image) and multilingual output (text and code) across 12 supported languages. Designed for assistant-style interaction and visual reasoning, Scout uses 16 experts per forward pass and features a context length of 10 million tokens, with a training corpus of ~40 trillion tokens. Built for high efficiency and local or commercial…Meta | 1,310,720 token context | $0.18/M input, $0.59/M output. Llama 4 Scout 17B Instruct (16E) is a mixture-of-experts (MoE) language model developed by Meta, activating 17 billion parameters out of a total of 109B. It supports native multimodal input (text and image) and multilingual output (text and code) across 12 supported languages. Designed for assistant-style interaction and visual reasoning, Scout uses 16 experts per forward pass and features a context length of 10 million tokens, with a training corpus of ~40 trillion tokens. Built for high efficiency and local or commercial deployment, Llama 4 Scout incorporates early fusion for seamless modality integration. It is instruction-tuned for use in multilingual chat, captioning, and image understanding tasks. Released under the Llama 4 Community License, it was last trained on data up to August 2024 and launched publicly on April 5, 2025.

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Llama 4 Scout is Meta's efficient mixture-of-experts model, activating 17 billion of its 109 billion parameters per forward pass. Its headline feature is a 10-million-token context window, the longest of any open-weights model at launch, paired with native image understanding across 12 languages. It suits developers and researchers who need multimodal capability at a price well below frontier closed models, or who want to run a capable vision-language model locally.

Known for

  • 10-million-token context window, the longest available in open weights
  • Native image and text input via early fusion, no bolt-on vision adapter
  • MoE architecture keeps active parameters at 17B, reducing inference cost
  • Multilingual across 12 languages, covering chat, captioning and code
  • Open weights under the Llama 4 Community License, local deployment allowed

Watch out for

  • The Llama 4 Community License is not fully permissive; check usage limits before commercial deployment.
  • 109B total parameters means local inference demands serious hardware despite the 17B active count.
  • Training data cuts off August 2024; anything after that is outside what it knows.

Prompts to try

Analyse a dense document
I'm pasting a long contract below. Read the entire thing, then list every clause that creates a financial obligation on my company, the dollar amount or formula involved, and the section number where it appears. Flag any clause where the obligation is open-ended or uncapped.
Describe and reason about an image
Look at the image I've attached. Describe what is happening in precise detail, then tell me what is unusual or inconsistent about it compared to what you would normally expect to see in this kind of scene. Give your reasoning step by step.
Multilingual customer reply
A customer has written to us in French complaining that their order arrived damaged and they want a refund. Draft a professional reply in French that apologises, confirms we will process a full refund within 5 business days, and asks them to keep the damaged item for our records. Keep the tone warm but not effusive.

Compare with

More text models from meta-llama

Questions people ask

Can I run Llama 4 Scout locally?
Yes, the weights are open and available on Hugging Face under the Llama 4 Community License. Bear in mind the full model is 109B parameters, so you will need substantial hardware; quantised versions ease that requirement considerably.
What does Llama 4 Scout cost via API, and how long is its context?
Pricing is $0.18 per million input tokens and $0.59 per million output tokens. The supported context window is 1,310,720 tokens via API, while the underlying model was trained to handle up to 10 million tokens.
How does Scout differ from Llama 4 Maverick?
Both are Llama 4 MoE models, but Scout activates 17B parameters with 16 experts and is positioned as the leaner, more deployment-friendly option; Maverick is the larger sibling aimed at higher-capability tasks.
Captain's verdict
A rare combination of open weights, genuine vision capability and an absurd context window at a price that makes frontier closed models look overpriced.
Model card on Hugging Face
Captain writes these notes from the model's own description and model card. Prices and context sizes are the provider's at the time of writing and can change.
Ranking badge
Updated Oct 22, 2026
Llama 4 Scout on ModelTrends.ai: Heat 5,292°
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