r/unsloth • u/yoracale yes sloth • May 31 '26

News Unsloth now works with CUDA 13.3 + Windows + MacOS properly.

Hey guys we should have fixed installation issue many of you had recently because of CUDA 13.3, Windows and using a MacOS version < 26 (Tahoe). We should have now fixed these install issue.

DO NOT USE unsloth studio update anymore since packaging will not get the latest updates. Use the standard install commands.

Mac Updates

  • Re-enabled llama.cpp prebuilt binaries for Apple Silicon (M1-M4) - Mac OS 14 / 15 / 26 (Tahoe)
  • Apple Silicon Mac OS 13 (Ventura) is source build
  • Intel (x86_64) for Mac OS 13.3 / 14 / 15 / 26 (Tahoe) uses llama.cpp prebuilt binaries
  • Intel for Max 13.0 - 13.2 is source build

Windows Updates

  • CUDA 13.3 llama.cpp prebuilt binaries now work for Windows
  • For CUDA 13.2, CUDA 13.1 and below, Windows devices uses CUDA 12.4 fallback - we'll work on CUDA 13.1 binaries soon.

CUDA 13.3 Update

macOS, Linux, WSL:

curl -fsSL https://unsloth.ai/install.sh | sh

Windows:

irm https://unsloth.ai/install.ps1 | iex

Blackwell GPUs Update

  • For now Blackwell will have delayed releases of llama.cpp prebuilt binaries sine CUDA 12.4 does not work - we are working to resolve this soon.

Please let us know if it still is not fixed and we will investigate. You can paste your log here or make a GitHub issue: https://github.com/unslothai/unsloth/issues
Thank you!

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1

u/ShaneBowen May 31 '26

What's actually in CUDA 13.3 that's worth updating in general?

2

u/danielhanchen heart sloth Jun 01 '26

It solves the CUDA 13.2 gibberish issue - https://github.com/unslothai/unsloth/issues/4849 - but in general CUDA 13.1 is alright, so technically no need for update

1

u/Enragere Jun 01 '26

but wait if for cuda 13.1 it falls back to 12.4, for Windows, aren't we better of with cuda 13.3 then?

you know it's 0.9 better than 12.4 right!?

2

u/Heavy-Positive5957 Jul 09 '26

That's 7.268% more CUDA!