The honest, $0-markup cost to run gpt-oss-20b (OpenAI, 21B) and Phi-4 (Microsoft, 14B), side by side — free on your own machine, on your own rented GPU at the vendor's price, or via your own API key.
| gpt-oss-20b | Phi-4 | |
|---|---|---|
| Parameters | 21B | 14B |
| Context window | 131.1K | 16.4K |
| License | Commercial OK | Commercial OK |
| VRAM to run | ~15 GB (Q4_K_M) | ~13 GB (Q4_K_M) |
| Rent a GPU | $0.26/hr | $0.26/hr |
| Your API key | $0.09/1M | $0.21/1M (est.) |
VRAM, size, context and license are facts from the catalog and the shared cost engine; API prices are real where we have them (labeled "est." otherwise). We don't rank model quality or quote benchmarks here.
Full cost breakdown: gpt-oss-20b →
Full cost breakdown: Phi-4 →
Open the free Spanvero advisor → to compare them live for your exact workload and hardware.
Spanvero · All comparisons · Prices as of 2026-06-17. $0 markup, your own accounts, we never resell compute. © 2026 Cynosure LLC.