Ollama

Free

ollama.com

Open-source framework enabling developers to run, customize, and serve large language models locally on macOS, Linux, and Windows.

About Ollama

Ollama is a revolutionary open-source tool and local inference runtime that allows developers to run cutting-edge large language models locally with a single terminal command. Engineered to solve the complexity of running local AI without dealing with complicated Python environments or GPU driver mismatches, Ollama bundles model weights, configurations, and quantization settings into a clean Modelfile format.

The platform supports leading open-weight foundation models including Llama 3, Mistral, Gemma, Phi, DeepSeek, and Code Llama. Ollama automatically leverages available hardware acceleration—including Apple Silicon Metal, NVIDIA CUDA, and AMD ROCm—to deliver blazing-fast token generation speeds. It exposes a native OpenAI-compatible REST API, allowing local models to power third-party desktop tools, IDEs, and agentic workflows.

Ollama is completely free and open-source software under the MIT license, available across macOS, Linux, and Windows. With an extensive official model registry and zero cloud telemetry, it has established itself as the gold standard for private, offline local AI development.

Key Features

Core capabilities and technical highlights of Ollama

One-line command interface allowing developers to download and run models like `ollama run llama3` instantly.

Native hardware acceleration leveraging Apple Silicon GPU, NVIDIA CUDA cores, and AMD ROCm automatically.

OpenAI-compatible REST API enabling drop-in replacement for cloud LLM endpoints in existing software projects.

Modelfile specification providing declarative model customization, parameter tuning, and prompt template packaging.

Popular Use Cases

How teams, developers, and creators get value from Ollama

1Run open-source large language models locally with zero internet connection for maximum privacy and zero API costs.

2Serve an OpenAI-compatible REST API locally on localhost port 11434 to power local web applications and agents.

3Customize model system prompts, temperature parameters, and context lengths using declarative Modelfiles.

4Accelerate AI model inference automatically using Apple Silicon Metal, NVIDIA CUDA, and AMD hardware.

Frequently Asked Questions

Common questions and answers regarding Ollama

Is Ollama free?

Yes, Ollama is 100% free and open-source software under the MIT license, with zero subscription fees or commercial restrictions.

Which operating systems support Ollama?

Ollama runs natively on macOS (with Apple Silicon Metal acceleration), Linux, and Windows.

Does Ollama provide an API for developers?

Yes, Ollama runs a local HTTP server exposing REST APIs for chat completions, embeddings, and raw text generation compatible with the OpenAI API format.

Can Ollama run models offline?

Yes, once a model is downloaded to your local machine, Ollama operates completely offline without sending any data over the internet.

Which models can I run with Ollama?

Ollama supports popular open-weight models including Llama 3, Mistral, Gemma, Qwen, DeepSeek, Phi, and Code Llama.