Short answer (as of Oct 14, 2026): On a 16 GB computer, start with Mistral Nemo 12B, Gemma 3 12B, Gemma 4 12B. They fit with room to spare. GPT-OSS 20B is a tight squeeze.
Our picks for a 16 GB computer
We kept models our formula says need 12 GB or less. That leaves about 4 GB for your system and browser. Then we sorted by size, since bigger usually means smarter.
| Model | Maker | Trust | Quality | RAM needed | Business | Sign-up |
|---|---|---|---|---|---|---|
| Mistral Nemo 12B | Mistral AI | 84 | Strong | 11 GB | Yes | No |
| Gemma 3 12B | 58 | Strong | 11 GB | With limits | Yes | |
| Gemma 4 12B | 84 | Strong | 11 GB | Yes | No | |
| Qwen3.5 9B | Alibaba Qwen | 84 | Good | 9 GB | Yes | No |
| Nemotron Nano 9B v2 | NVIDIA | 64 | Good | 9 GB | With limits | No |
| Qwen2.5 VL 7B | Alibaba Qwen | 84 | Good | 8 GB | Yes | No |
| Qwen3 8B | Alibaba Qwen | 84 | Good | 8 GB | Yes | No |
| DeepSeek R1 0528 8B | DeepSeek | 84 | Good | 8 GB | Yes | No |
| GPT-OSS 20B (tight fit) | OpenAI | 84 | Very strong | 17 GB (maker says 16 GB) | Yes | No |
RAM numbers are our estimate for a 4-bit file, not a test. See the formula.
What about GPT-OSS 20B?
OpenAI says GPT-OSS 20B can "run within 16GB of memory" (source). Our simple formula says about 17 GB. So we list it above as a tight fit. Close other apps and keep chats short. On a 24 GB or 32 GB machine it fits with room to spare.
Mac or PC?
On a Mac with an Apple chip, the memory is shared with the graphics, so the full 16 GB counts. On a PC, a graphics card with 16 GB of VRAM is the fast way. A PC with 16 GB of normal RAM and no big card still works, just slower.
LM Studio says 16 GB of RAM is a good start. See best local AI for Mac or can my gaming PC run AI?
How to try one
Install LM Studio, search for the model name, and pick a file that ends in Q4_K_M. Our LM Studio guide walks you through it in about 15 minutes.
Common questions
What is the best local AI model for 16 GB of RAM?
Our top picks by size and trust are Mistral Nemo 12B, Gemma 3 12B, Gemma 4 12B. Each one needs about 12 GB or less by our estimate, which leaves room for your system.
Can 16 GB of RAM run GPT-OSS 20B?
Just barely. OpenAI says it runs within 16 GB of memory. Our formula says about 17 GB. Close other apps, or use a machine with 24 GB or more.
Is 16 GB enough for local AI?
Yes for good everyday models. LM Studio says 16 GB of RAM is a good start. For the strong 27B to 32B models, plan on 32 GB.
Sources we checked
- OpenAI gpt-oss-20b model card, checked Oct 14, 2026
- LM Studio system requirements, checked Oct 14, 2026
- Mistral Nemo 12B official page, checked Oct 14, 2026
- Gemma 3 12B official page, checked Oct 14, 2026
- Gemma 4 12B official page, checked Oct 14, 2026
Newsletter
Local AI news for non-coders
Which new models are worth your time, which ones are just hype, and the license gotchas before they bite. All the useful bits, none of the nerd-party small talk.
This opens our sign-up page on Beehiiv, our email provider. Confirm your email there to join.