Having this issue as well.

Hello,

same issue. Vulkan driver is installed (2.0.279) for Radeon RX550 on Windows 11

Ok, since 0.5.15, you don't need enable vulkan. It's automatic see log:

2025-03-20T17:09:14.120Z [APP]::{"errno":-4075,"code":"EEXIST","syscall":"symlink","path":"C:\\Users\\xxxx\\AppData\\Local\\Programs\\jan\\resources\\app.asar.unpacked\\shared\\engines\\cortex.llamacpp\\windows-amd64-vulkan\\v0.1.49","dest":"C:\\Users\\xxxx\\AppData\\Roaming\\Jan\\data\\engines\\cortex.llamacpp\\windows-amd64-vulkan\\v0.1.49"}

@emeric-martineau Nope. Tried running models like olm2 on Jan AI and it used my CPU instead of GPU. I will try to upload my log in the next few days.

In my case, when I go to Local engine configuration, I see llama-cpp Backen use windows-amd64-vulkan.

If I run a model, I see GPU is used:

The documentation was not just updated for version 0.5.15.

@mon-jai I think you should open another issue for your GPU not working, and change title of this issue to something like Documentation not updated.

For me, on Linux it fails to load properly sometimes. I have to killall cortex-server and killall jan and then restart and retry til it does work. But it eventually does.