> For the complete documentation index, see [llms.txt](https://docs.aichatone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aichatone.com/product-guides/custom-chatbots/local-llm-models/ollama.md).
# Ollama
[Ollama](https://github.com/ollama/ollama) allows you to run open-source large language models, such as Llama 2, LLaVA, Mistral, Orca etc locally.
## Preparation[](https://doc.chathub.gg/custom-chatbots/openai#preparation)
Install Ollama and download models.
## Configuration
We're using the `gemma:2b` model in this example.
API Key is required but ignored, so you can input any string.
## Set up environment variables for CORS
Run the following commands so that Ollama allows connection from AIChatOne
```
launchctl setenv OLLAMA_HOST "0.0.0.0"
launchctl setenv OLLAMA_ORIGINS "*"
```
After that, you need to restart Ollama for the changes to take effect.
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For more details:
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