OpenAI · First MLX build 29 Aug 2025
gpt-oss-120b
MLX
Text apache-2.0 Trending
A 117B parameter text generation model from OpenAI, with 3 MLX builds at MXFP4.
- Parameters
- 117B From Hugging Face
- Quantisation
- MXFP4 gpt-oss-120b-MXFP4-Q8
- Memory needed
- 76 GB Estimate, unified memory
- Download
- 65.8 GB Weights, estimated
- Downloads
- 4.3K This build, last 30 days
- Task
- Text generation Text
- MLX builds
- 3 On mlx-community
- Devices
- Mac Apple silicon
Memory
Will it fit?Needs about 76 GB at MXFP4
8 GB
16 GB
24 GB
32 GB
64 GB
128 GB
Fits with headroomTight, close other appsWon’t fit
Estimated from the size of the weights, plus a fifth for context and working memory and 2 GB for macOS and your apps. Long contexts need more.
Run it
Terminal · mlx-lm$ pip install -U mlx-lm
$ mlx_lm.generate --model mlx-community/gpt-oss-120b-MXFP4-Q8 --prompt "Hello"MLX builds
3 on mlx-community| gpt-oss-120b-MXFP4-Q8 | MXFP4 | 65.8 GB | 76 GB | 4.3K |
|---|---|---|---|---|
| gpt-oss-120b-MXFP4-Q4 | MXFP4 | 65.8 GB | 76 GB | 1.3K |
| gpt-oss-120b-mxfp4-bf16 | MXFP4 | 68.8 GB | 79 GB | 677 |
Sizes are estimated from Hugging Face’s parameter counts and the quantisation. Downloads are for the last 30 days.