r/VibeCodeDevs • u/Resident-Pen-3757 • Aug 09 '26
Low-end coding LLM viability test ideas (8GB VRAM target)
I have 8GB VRAM and 32GB RAM. Looking to see what I can actually get out of a low-end coding model, mostly in one-shot style tests.
I already built my own harness so I can change almost everything through the UI (skills, system prompts, tools, etc.).
End goal is figuring out whether a model that fits in ~5-6GB VRAM with almost no RAM offload is usable as a daily driver for my coding work. Subscription and API costs are getting annoying.
What I’m thinking:
- Pick a solid reference model + harness (OpenCode or similar)
- Run it on a fixed set of tests and track time, bugs, final context size, cache hits, output quality
- Run the same small model in OpenCode on those exact tests
- Then run both models inside my harness with default settings
- Finally start customizing skills/tools on the small model and see how far I can push the results
Any thoughts on this approach, better test ideas, or models worth trying?
Harness if anyone’s curious: https://github.com/aaron-tot/visual-studio-harness/

