---
title: "Proprietary Model"
description: "A proprietary Large Language Model (LLM) is an AI model developed and owned by a specific company, using their private training data and resources. Unlike Open-source Models and Open-weights Models, proprietary LLMs are not publicly available and can only be accessed through the company's LLM API or platform."
canonical_url: "https://promptmetheus.com/resources/llm-knowledge-base/proprietary-model"
---

> Index of every page on this site: [llms.txt](https://promptmetheus.com/llms.txt)

A proprietary [Large Language Model (LLM)](https://promptmetheus.com/resources/llm-knowledge-base/large-language-model-llm) is an AI model developed and owned by a specific company, using their private training data and resources. Unlike [Open-source Models](https://promptmetheus.com/resources/llm-knowledge-base/open-source-model) and [Open-weights Models](https://promptmetheus.com/resources/llm-knowledge-base/open-weights-model), proprietary LLMs are not publicly available and can only be accessed through the company's [LLM API](https://promptmetheus.com/resources/llm-knowledge-base/llm-api) or platform.

Proprietary models are often [fine-tuned](https://promptmetheus.com/resources/llm-knowledge-base/fine-tuning) for specific use cases and industries, offering unique features and capabilities tailored to the company's target audience. Companies with proprietary LLMs maintain control over the model's usage, pricing, and intellectual property.

## Sitemap

See the full [sitemap](https://promptmetheus.com/sitemap.md) for all pages.