GPU × local model compatibility
Can Apple MacBook Pro M4 Max (40-core GPU) 48GB run OpenAI gpt-oss-20b?
Yes — it can run.
An M4 Max 48GB configuration has ample unified memory for gpt-oss-20b, with Metal runtime behavior distinct from CUDA GPUs.
14.28GBVRAM required
36.00GBAvailable memory
21.72GBMemory headroom
MXFP4Recommended quantization
8KContext
Try these alternatives:InternVL3 5-GPT-OSS-20B-A4B-PreviewKimi-VL-A3B-InstructKimi-VL-A3B-Thinking-2506
A lighter MXFP4 / 8K configuration also fits.
Calculated estimate, not a measured benchmark.