gpt-oss-20b vs gpt-oss-20b-MXFP4-Q8
Specs, VRAM requirements and download trends — updated 6 August 2026.
mlx-community · B
Params
20.9 B
Context
131,072
30d
355 K
apache-2.0 · commercial OK
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | gpt-oss-20b | gpt-oss-20b-MXFP4-Q8 |
|---|---|---|
| Parameters | 21.5 B | 20.9 B |
| Architecture | GptOssForCausalLM | GptOssForCausalLM |
| Context length | 131,072 | 131,072 |
| Licence | apache-2.0 | apache-2.0 |
| Commercial use | Allowed | Allowed |
| Languages | — | — |
| Downloads 30d | 8,616,555 | 355,273 |
| Downloads all time | 87.8 M | 7.1 M |
| Quantizations on the Hub | SAFETENSORS | SAFETENSORS |
| Gated | No | No |
| First seen on the Hub | 2025-08-04 | 2025-08-29 |
Download trend
Daily snapshots, last 10 days (28 Jul – 6 Aug)
8.6 M346 K
gpt-oss-20b
gpt-oss-20b-MXFP4-Q8
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
gpt-oss-20b-MXFP4-Q8 · fp16 @ 128K ctx
64.0 GB / 24 GB
gpt-oss-20b · fp16 @ 128K ctx
82.4 GB / 24 GB