The real cost to run gpt-oss-120b

OpenAI · 117B parameters. OpenAI open-weights MoE — 117B total, ~5.1B active (128 experts). Ships native ~4-bit (MXFP4, ~63 GB) so it fits a single 80GB GPU; Apache-2.0.

Spanvero shows the honest price three ways — free on your own hardware, your own rented GPU at the vendor's rate, or your own API key — with $0 markup. Loading the interactive advisor…