gpt-oss-20b vs gpt-neox-20b
Specs, VRAM requirements and download trends — updated 21 September 2026.
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | gpt-oss-20b | gpt-neox-20b |
|---|---|---|
| Parameters | 21.5 B | 20.7 B |
| Architecture | GptOssForCausalLM | GPTNeoXForCausalLM |
| Context length | 131,072 | 2,048 |
| Licence | apache-2.0 | apache-2.0 |
| Commercial use | Allowed | Allowed |
| Languages | — | 1 |
| Downloads 30d | 6,658,531 | 652,129 |
| Downloads all time | 98.5 M | 6.2 M |
| Quantizations on the Hub | SAFETENSORS | SAFETENSORS |
| Gated | No | No |
| First seen on the Hub | 2025-08-04 | 2022-04-07 |
Download trend
Daily snapshots, last 56 days (28 Jul – 21 Sep)
8.6 M652 K
gpt-oss-20b
gpt-neox-20b
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
gpt-neox-20b · fp16
49.0 GB / 24 GB
gpt-oss-20b · fp16 @ 128K ctx
82.4 GB / 24 GB