Local model run decision

Can Apple MacBook Pro M4 Max (40-core GPU) 48GB run OpenAI gpt-oss-20b?

Yes — the recommended configuration fits.

21.52GB memory headroom remains.

14.48GBCalculated requirement
36GBUsable VRAM / RAM
MXFP4Recommended quant
8KContext
Calculated, not benchmarked.

Related compatibility answers