gpt-oss-20b
OpenAIopen weights
- Licence
- Apache-2.0
- ID
openai/gpt-oss-20b
gpt-oss-20b has a rating of 878 (±78) in the Slovenian Chat Arena, set by 127 votes in blind comparisons in Slovenian. The rating's 95% interval is 800–956: it shows how precisely the votes have pinned the rating down so far. It wins 21.4% of its decided comparisons (21 wins, 77 losses, 29 ties). The median length of its answers is 285 words. It is developed by OpenAI. Its weights are open (licence: Apache-2.0).
At a glance
- Rating
- 878±78
- 95% interval 800–956
- Answer length
- 285words
- median, typically 8–674
- Votes
- 127
- 21.4% of decided votes won
Model information
OpenAI's open-weights model gpt-oss-20b (21B parameters, mixture of experts).
Note: The model is made available in the arena via the NVIDIA NIM API.
It is a reasoning model; its thinking is hidden in the arena.
Statistics
Rating with 95% confidence interval
- GaMS-9B-Instructinactive
- deepseek-v3.2inactive
- GaMS-27B-Instructinactive
- gpt-oss-20b
- Mistral-Small-24B-Instruct-2501inactive
- bielik-11b-v2.3-instructinactive
- llama3-70b-instructinactive
The models just above and below it on the leaderboard, on one axis. The upright mark is the rating, the line its 95% interval.
Vote outcomes
- Wins21
- Ties29
- Losses77
- Total queries
- 204
Answer length among models
Median words per answer for every model on the leaderboard, on one axis.
Longer answers than 25 of 30 other models.
All models in numbers
| Model | Median words |
|---|---|
| gpt-oss-120b | 463 |
| Ministral-3-14B-Instruct-2512 | 348 |
| deepseek-r1 | 336 |
| gemini-2.5-pro | 330 |
| Qwen3-Next-80B-A3B-Instruct | 312 |
| gpt-oss-20b | 285 |
| gemini-3-pro-preview | 260 |
| gemini-2.5-flash | 242 |
| GaMS-9B-Instruct-Nemotron | 236 |
| GaMS-27B-Instruct-Nemotron | 226 |
| Mistral-Large-3-675B-Instruct-2512 | 224 |
| deepseek-r1-0528 | 216 |
| GaMS3-12B-Instruct | 200 |
| llama3-70b-instruct | 168 |
| gpt-5-mini | 162 |
| kimi-k2-instruct | 142 |
| Mistral-Small-24B-Instruct-2501 | 110 |
| gpt-5 | 107 |
| gemma-3-12b-it | 107 |
| bielik-11b-v2.3-instruct | 104 |
| gemma-3-27b-it | 101 |
| gemini-1.5-pro | 100 |
| llama-4-scout-17b-16e-instruct | 91 |
| llama-3.3-70b-instruct | 90 |
| EuroLLM-9B-Instruct | 83 |
| gemini-2.0-flash | 78 |
| llama-4-maverick-17b-128e-instruct | 78 |
| gpt-4o | 68 |
| Zlatorog-12B-Instruct-Beta | 47 |
| GaMS-9B-Instruct | 13 |
| GaMS-27B-Instruct | 10 |