Install PyAIStack

Requirements

• Python 3.10 or newer
• Ollama running locally
• LLM Providers See supported list

Install Ollama

• On Mac / Linux

curl -fsSL https://ollama.com/install.sh | sh

• On Windows

irm https://ollama.com/install.ps1 | iex

Pull the default models:

ollama pull embeddinggemma
ollama pull gemma3:4b

Install using pip

pip install pyaistack

For PostgreSQL + pgvector support, install the optional dependency:

pip install "pyaistack[postgres]"

The target PostgreSQL database must already have the pgvector extension enabled. See PostgreSQL + pgvector.

Verify the installation

python -c "from pyaistack import RAG; print(RAG().document_count)"

The command prints 0 for a new in-memory index.