What it does
Core capabilities at a glance
- Drop-in OpenAI API replacement for chat, images, audio, and embeddings
- Multi-modal support (text, image, audio, video)
- Backend-agnostic (llama.cpp, diffusers, whisper, piper)
- GPU acceleration (CUDA, Metal, OpenCL)
- Gallery of pre-configured model YAML files
- REST API with LangChain and plugin integrations
Deep dive
The full breakdown - performance, comparisons, and setup
LocalAI
LocalAI aims to be the single API endpoint that replaces every OpenAI service you use. Chat completions, image generation, text-to-speech, speech-to-text, embeddings - all served from one Docker container on your hardware.
What it is
LocalAI is a Go-based API server created by Ettore Di Giacinto that acts as a drop-in replacement for OpenAI's API. Unlike Ollama which focuses on LLMs, LocalAI covers the full OpenAI surface: /v1/chat/completions, /v1/images/generations, /v1/audio/speech, /v1/audio/transcriptions, and /v1/embeddings.
It uses a backend plugin architecture - llama.cpp for LLMs, diffusers for image generation, whisper.cpp for STT, and piper for TTS - all configurable through YAML model definition files.
Why this matters
LocalAI's value proposition is API compatibility breadth. If your application uses multiple OpenAI APIs - chat, images, audio - LocalAI can replace all of them with a single local endpoint:
- Full API surface: chat, images, audio, embeddings, all OpenAI-compatible
- Model gallery: curated YAML files make adding new models a one-liner
- Backend flexibility: swap inference engines without changing your API calls
- Active development: releases every 2-3 weeks, responsive maintainer
Performance you'll see
| Hardware | Workload | Performance |
|---|---|---|
| RTX 4090 | Qwen3 8B chat | ~80 tok/s |
| RTX 4090 | Stable Diffusion XL image | ~2 s/image |
| RTX 4090 | Whisper transcription | ~8x real-time |
| CPU-only | Piper TTS | ~2x real-time |
How it stacks up
| LocalAI | Ollama | vLLM | ComfyUI | |
|---|---|---|---|---|
| LLM inference | ✓ | ✓ | ✓ | ✗ |
| Image generation | ✓ | ✗ | ✗ | ✓ |
| TTS/STT | ✓ | ✗ | ✗ | ✗ |
| Embeddings | ✓ | ✓ | ✗ | ✗ |
| API compatibility | OpenAI full | OpenAI chat | OpenAI chat | None |
| Best for | All-in-one API | LLM-only | Production LLM | Image/video |
What runs on it
- Open WebUI - connects to LocalAI as an OpenAI-compatible provider
- AnythingLLM - supports LocalAI for RAG workflows
- n8n - uses LocalAI's API for automation workflows
Get started
docker run -ti --gpus all \
-p 8080:8080 \
-v $PWD/models:/build/models \
localai/localai:latest-gpu-nvidia-cuda-12
# Or with docker-compose using the full AIO setup
git clone https://github.com/mudler/LocalAI
cd LocalAI
docker-compose up -dWhen to use something else
Frequently asked
Quick answers to common questions
What is LocalAI?
LocalAI is a inference-server tool for local AI workloads. Self-hosted, OpenAI-compatible API server for LLMs, image generation, audio, and embeddings.
Is LocalAI free and open source?
Yes, LocalAI has 49,624 GitHub stars and is licensed under MIT. You can self-host it for free on linux, docker, macos, windows.
What platforms does LocalAI support?
LocalAI runs on linux, docker, macos, windows.
What hardware do I need for LocalAI?
The hardware requirements depend on which models you run. Check our hardware directory for compatible GPUs and systems. LocalAI has 49,624 GitHub stars and an active community.
Does LocalAI support GPU acceleration?
LocalAI supports GPU acceleration via CUDA, Metal, or Vulkan depending on your platform. For the best performance, pair it with an NVIDIA RTX 4090 or 5090.
What are the best alternatives to LocalAI?
Popular alternatives include other inference-server tools in our directory. Browse our full collection at /tool for comparisons, community reviews, and benchmark data to find the right fit for your workflow.
How much does LocalAI cost?
LocalAI is free-open-source. It is completely free and open source to self-host.
Pairs well with
Complementary tools, models, and hardware