gpt-oss-20b vs Llama-3.1-8B-Instruct
Specs, VRAM requirements and download trends — updated 10 November 2026.
openai · A · Open weights
Params
21.5 B
Context
131,072
30d
5.8 M
apache-2.0 · commercial OK
meta-llama · B · Open weights
Params
8.0 B
Context
—
30d
4.5 M
llama3.1 licence · conditional
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | gpt-oss-20b | Llama-3.1-8B-Instruct |
|---|---|---|
| Deployment | Open weights · also via API | Open weights · also via API |
| Parameters | 21.5 B | 8.0 B |
| Architecture | GptOssForCausalLM | LlamaForCausalLM |
| Context length | 131,072 | 131,072 |
| Licence | apache-2.0 | llama3.1 |
| Commercial use | Allowed | Conditional |
| Languages | — | 8 |
| Downloads 30d | 5,830,063 | 4,504,499 |
| Downloads all time | 108.5 M | 193.6 M |
| Quantizations on the Hub | SAFETENSORS | SAFETENSORS |
| Gated | No | Yes — accept licence |
| First seen on the Hub | 2025-08-04 | 2024-07-18 |
| API input price / 1M tokens | $0.03 | $0.02 |
| API output price / 1M tokens | $0.13 | $0.04 |
| Est. cost per 1M input + 1M output tokens | $0.16 | $0.06 |
| Cached input / 1M tokens | $0.03 | — |
| AA Intelligence Index | — | — |
| AA Coding Index | 20.7 | 5.4 |
| AA Agentic Index | 1.2 | — |
| Max output tokens | 117,964 | 16,384 |
| API providers | 10 | 4 |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | No |
API cost
Estimated cost of 1M input + 1M output tokens via OpenRouter
gpt-oss-20b
$0.16
Llama-3.1-8B-Instruct
$0.06
Llama-3.1-8B-Instruct is 2.7× cheaper at list price.
Download trend
Daily snapshots, last 90 days (13 Aug – 10 Nov)
8.1 M4.3 M
gpt-oss-20b
Llama-3.1-8B-Instruct
A overtook B on 16 Oct
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
Llama-3.1-8B-Instruct · fp16
19.4 GB / 24 GB
gpt-oss-20b · fp16 @ 128K ctx
82.4 GB / 24 GB