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A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

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Self-GPT: Open WebUI + Ollama = Self Hosted ChatGPT (sh.itjust.works)

submitted 1 month ago by [email protected] to c/selfhosted

51 comments fedilink hide all child comments

Instructions here: https://github.com/ghobs91/Self-GPT

If you’ve ever wanted a ChatGPT-style assistant but fully self-hosted and open source, Self-GPT is a handy script that bundles Open WebUI (chat interface front end) with Ollama (LLM backend).

Privacy & Control: Unlike ChatGPT, everything runs locally, so your data stays with you—great for those concerned about data privacy.
Cost: Once set up, self-hosting avoids monthly subscription fees. You’ll need decent hardware (ideally a GPU), but there’s a range of model sizes to fit different setups.
Flexibility: Open WebUI and Ollama support multiple models and let you switch between them easily, so you’re not locked into one provider.

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[–] [email protected] 2 points 1 month ago (1 children)

Yeh, i did some looking up in the meantime and indeed you're gonna have a context size issue. That's why it's only summarizing the last few thousand characters of the text, that's the size of its attention.

There are some models fine-tuned to 8K tokens context window, some even to 16K like this Mistral brew. If you have a GPU with 8G of VRAM you should be able to run it, using one of the quantized versions (Q4 or Q5 should be fine). Summarizing should still be reasonably good.

If 16k isn't enough for you then that's probably not something you can perform locally. However you can still run a larger model privately in the cloud. Hugging face for example allows you to rent GPUs by the minute and run inference on them, it should just net you a few dollars. As far as i know this approach should still be compatible with Open WebUI.

[–] [email protected] 1 points 1 month ago (1 children)

Thanks! I actually picked up the concept of context window, and from there how to create a modelfile, through one of the links provided earlier and it has made a huge difference. In your experience, would a small model like llama3.2 with a bigger context window be able to provide the same output as a big modem L, like qwen2.5:14b, with a more limited window? The bigger window obviously allow more data to be taken into account, but how does the model size compare?

[–] [email protected] 1 points 1 month ago

If I understand these things correctly, the context window only affects how much text the model can "keep in mind" at any one time. It should not affect task performance outside of this factor.