Agents et multi-agents

LlamaIndex

run-llama/llama_index

LlamaIndex is an open-source Python data framework for building LLM applications with private data, offering data connectors, indexing structures, and advanced retrieval interfaces. It is complemented by LlamaParse, an enterprise platform for agentic OCR, parsing, extraction, and indexing.

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Vue d’ensemble

LlamaIndex is designed to augment large language models with custom private data. It provides tools to ingest data from various sources (APIs, PDFs, SQL, etc.), structure it into indices or graphs for LLM consumption, and expose an advanced retrieval and query interface. The framework supports both high-level APIs for rapid prototyping and lower-level APIs for deep customization of data connectors, indices, retrievers, and query engines. It is structured around a core package with over 300 optional integration packages available via LlamaHub.

Fonctionnalités clés

  • Data connectors for ingesting APIs, PDFs, docs, SQL, and more
  • Data structuring via indices and graphs for LLM use
  • Advanced retrieval and query interface
  • Over 300 integration packages on LlamaHub
  • High-level and low-level APIs for varied user expertise
  • LlamaParse integration for agentic OCR and document parsing
  • Support for multi-agent workflows
  • In-memory and disk-persisted storage contexts

Prérequis, installation et démarrage rapide

There are two primary installation methods. Starter: install the `llama-index` package which includes core and a selection of integrations. Customized: install `llama-index-core` and then add specific integration packages as needed (e.g., `pip install llama-index-core`, `pip install llama-index-llms-openai`, `pip install llama-index-llms-ollama`, `pip install llama-index-embeddings-huggingface`).

Utilisation

To build a simple vector store index, load documents using `SimpleDirectoryReader`, create an index with `VectorStoreIndex.from_documents(documents)`, and query it using `index.as_query_engine()`. Non-OpenAI LLMs can be configured via the `Settings` object, setting custom LLM, tokenizer, and embedding model instances before creating the index.

Compatibilité des modèles et cas d’usage

Supports OpenAI models out of the box. Compatible with non-OpenAI LLMs such as models hosted via Ollama (e.g., `llama-3.1:latest`) and HuggingFace embedding models (e.g., `BAAI/bge-small-en-v1.5`).

Licence et notes sur les risques

The repository is licensed under the MIT license.

Editorial verification 2026-08-09: repository URL, owner, description, license and repository statistics were reviewed. License metadata: MIT. README was fetched for the channel draft; re-check repository dependencies, releases and model terms before production use.

Publication et maintenance

Not stated in the repository metadata.

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