AI Reference 070
Modern Model Families
Current · Aug 2026
Primary sources linked
Llama 4 Scout and Maverick
Definition
Meta released Llama 4 Scout and Maverick in April 2025 as natively multimodal mixture-of-experts models. Meta describes Scout as having 17 billion active parameters and 16 experts, and Maverick as having 17 billion active parameters and 128 experts.
MODEL FAMILY / DIFFERENT DEPLOYMENT TARGETSFASTSMALLFRONTIER
What are Scout and Maverick?
Llama 4 Scout and Llama 4 Maverick are Meta models released in April 2025. Meta describes both as natively multimodal mixture-of-experts models.
How the two models differ
Meta described Scout as a model with 17 billion active parameters and 16 experts. Maverick also uses 17 billion active parameters but 128 experts, giving it much larger total capacity while keeping per-token activation relatively sparse.
Why active parameters matter
In an MoE model, the total number of stored parameters is not the same as the number used for each token. Routing activates only selected experts. That distinction is essential when comparing MoE models with dense models where nearly all parameters participate in each forward pass.
Related terms, defined
These nearby terms are linked because they name distinct concepts that are easy to confuse with this page's subject.
Modern Model Families
The Grok Model Family
Grok is the model family developed by xAI/SpaceXAI, spanning general reasoning, coding, voice and generative-media systems.
Modern Model Families
Grok 4.5
SpaceXAI introduced Grok 4.5 in July 2026 for coding, agentic tasks and knowledge work, then expanded its availability through the company's own products and integrations including GitHub Copilot.
Modern Model Families
The Mistral Model Family
Mistral AI develops commercial and open-weight language models for general generation, coding, multimodal and specialist workloads.
Modern Model Families
Cohere Command Models
Cohere's Command family is designed heavily around enterprise generation, retrieval, tool use and multilingual applications. Cohere's 2026 documentation lists Command A+ as a mixture-of-experts model with text and image input support.
Modern Model Families
Open, Open-Weight and Closed AI Models
AI models differ in what users can inspect and control. Open-weight models make trained parameters available under a license; closed models are typically accessed through hosted products or APIs.
Reference guide and primary sources
Wikipedia is used here as a terminology and history reference guide. Current model versions, institutional statistics and product-specific claims are also linked to first-party or institutional sources because those details can change faster than encyclopedia articles.