AI
Can you run gpt-oss-20b on your GPU? Yes with 16 GB of VRAM, and slower on 8 GB
gpt-oss-20b fits fully on any 16 GB graphics card: 14.9 GB at 8K context and 15.5 GB at 32K, per the llama.cpp guide. An 8 GB or 12 GB card still runs it with some layers in system RAM. What your GPU, RAM and Mac need, how fast each card is, and the Ollama setting that quietly cuts your context. Checked Nov 3, 2026.
Aliteq Team · · 9 min