gpt-oss-20b vs Llama-3.1-8B-Instruct
Specs, VRAM requirements and download trends — updated 25 October 2026.
openai · A · Open weights
Params
21.5 B
Context
131,072
30d
5.8 M
apache-2.0 · commercial OK
unsloth · B · Open weights
Params
8.0 B
Context
131,072
30d
177 K
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 |
| 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 | 5,764,154 | 176,516 |
| Downloads all time | 105.3 M | 2.8 M |
| Quantizations on the Hub | SAFETENSORS | SAFETENSORS |
| Gated | No | No |
| First seen on the Hub | 2025-08-04 | 2025-02-15 |
| API input price / 1M tokens | $0.018 | not on OpenRouter |
| API output price / 1M tokens | $0.09 | not on OpenRouter |
| Est. cost per 1M input + 1M output tokens | $0.11 | not on OpenRouter |
| Cached input / 1M tokens | $0.009 | not on OpenRouter |
| AA Intelligence Index | 10 | not on OpenRouter |
| AA Coding Index | — | not on OpenRouter |
| AA Agentic Index | — | not on OpenRouter |
| Max output tokens | 32,768 | not on OpenRouter |
| API providers | 10 | not on OpenRouter |
| Tool calling | Yes | not on OpenRouter |
| Reasoning mode | Yes | not on OpenRouter |
API cost
Estimated cost of 1M input + 1M output tokens via OpenRouter
gpt-oss-20b
$0.11
Download trend
Daily snapshots, last 90 days (28 Jul – 25 Oct)
8.6 M167 K
gpt-oss-20b
Llama-3.1-8B-Instruct
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
Llama-3.1-8B-Instruct · fp16 @ 128K ctx
37.4 GB / 24 GB
gpt-oss-20b · fp16 @ 128K ctx
82.4 GB / 24 GB