gpt-oss-120b vs Llama-3.1-405B-FP8
Specs, VRAM requirements and download trends — updated 6 August 2026.
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | gpt-oss-120b | Llama-3.1-405B-FP8 |
|---|---|---|
| Parameters | 120.4 B | 405.9 B |
| Architecture | GptOssForCausalLM | LlamaForCausalLM |
| Context length | 131,072 | — |
| Licence | apache-2.0 | llama3.1 |
| Commercial use | Allowed | Conditional |
| Languages | — | 8 |
| Downloads 30d | 4,221,708 | 493,412 |
| Downloads all time | 48.6 M | 1.1 M |
| Quantizations on the Hub | SAFETENSORS | SAFETENSORS |
| Gated | No | Yes — accept licence |
| First seen on the Hub | 2025-08-04 | 2024-07-20 |
Download trend
Daily snapshots, last 10 days (28 Jul – 6 Aug)
4.3 M419 K
gpt-oss-120b
Llama-3.1-405B-FP8
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
gpt-oss-120b · fp16 @ 128K ctx
433.0 GB / 24 GB
Llama-3.1-405B-FP8 · fp16
597.3 GB / 24 GB