gpt-oss-20b vs gemma-2-27b-it
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
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | gpt-oss-20b | gemma-2-27b-it |
|---|---|---|
| Deployment | Open weights · also via API | Open weights · also via API |
| Parameters | 21.5 B | 27.2 B |
| Architecture | GptOssForCausalLM | Gemma2ForCausalLM |
| Context length | 131,072 | 8,192 |
| Licence | apache-2.0 | gemma |
| Commercial use | Allowed | Conditional |
| Languages | — | — |
| Downloads 30d | 5,764,154 | 19,598 |
| Downloads all time | 105.3 M | 5.4 M |
| Quantizations on the Hub | SAFETENSORS | SAFETENSORS |
| Gated | No | Yes — accept licence |
| First seen on the Hub | 2025-08-04 | 2024-06-24 |
| API input price / 1M tokens | $0.018 | $0.65 |
| API output price / 1M tokens | $0.09 | $0.65 |
| Est. cost per 1M input + 1M output tokens | $0.11 | $1.30 |
| Cached input / 1M tokens | $0.009 | — |
| AA Intelligence Index | 10 | — |
| AA Coding Index | — | — |
| AA Agentic Index | — | — |
| Max output tokens | 32,768 | 2,048 |
| API providers | 10 | 1 |
| Tool calling | Yes | No |
| Reasoning mode | Yes | No |
API cost
Estimated cost of 1M input + 1M output tokens via OpenRouter
gpt-oss-20b
$0.11
gemma-2-27b-it
$1.30
gpt-oss-20b is 12.0× cheaper at list price.
Download trend
Daily snapshots, last 90 days (28 Jul – 25 Oct)
8.6 M19 K
gpt-oss-20b
gemma-2-27b-it
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
gemma-2-27b-it · fp16
64.5 GB / 24 GB
gpt-oss-20b · fp16 @ 128K ctx
82.4 GB / 24 GB