Ollama: Complete Guide to Running Local Large Language Models

What is Ollama?

Ollama is the leading platform for running large language models locally. It brings the power of GPT, Llama, Mistral, and hundreds of other open-source AI models directly to your machine – no API calls, no cloud dependency, complete data privacy.

Ollama enables developers, researchers, and enterprises to run state-of-the-art AI models on their own hardware. From a 3B parameter model on a laptop to a 70B model on a GPU server, Ollama handles it all.

Key Features & Capabilities

• 100+ Pre-built Models – Download and run Llama 3.1, Mistral, Gemma, Phi, Command R, and more with a single command
• Local Execution – All inference happens on your machine. Your data never leaves your infrastructure.
• GPU Acceleration – Full CUDA acceleration on NVIDIA GPUs, Metal support on Apple Silicon
• OpenAI-Compatible API – Use the OpenAI client library with your local Ollama server
• Streaming Responses – Real-time token-by-token streaming for interactive applications
• Vision Models – Process images with vision-capable models like Llama 3.2 Vision
• Tool Calling – Models can call external tools and functions autonomously
• Structured Outputs – Define JSON schemas for structured model responses
• Embedding Generation – Built-in embeddings for semantic search applications
• Thinking Mode – Chain-of-thought reasoning for complex problem solving

Solutions

• AI Coding Assistants – Integrate with Cline, Claude Code, Codex, Copilot CLI for AI-powered coding
• Local Chatbots – Build private chatbots that run entirely offline
• Document Analysis – Summarize, extract, and analyze documents locally
• Enterprise AI – Sovereign AI infrastructure without vendor lock-in
• Research & Experimentation – Test and fine-tune models on your own hardware

Use Cases

• Code Completion – AI code completion in your preferred editor
• Customer Support – Private chatbots for internal support
• Document Q&A – Ask questions about your documents locally
• Data Extraction – Extract structured data from unstructured text
• Content Generation – Generate marketing copy, documentation, reports

Open Data World Integration

On Open Data World, Ollama powers the LLM and Embedding layers. Access it via the Agent API:

curl 'https://agent.open-data.world/agent?action=generate&prompt=your+text'
curl 'https://agent.open-data.world/agent?action=embed&text=your+text'

Or use the Agent Dashboard for interactive model selection.

Technical Specifications

• Platforms – macOS, Linux, Windows, Docker
• GPU Support – NVIDIA (CUDA), Apple Silicon (Metal), AMD
• Model Format – GGUF (GGML Universal Format)
• API – REST API with OpenAI compatibility
• Context Length – Up to 128K tokens (model dependent)