OpenAI: gpt-oss-20b (free)
Released Aug 5, 2025text→text
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gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...
Best overall rank
#229
▼ 2 vs 7d ago
Total arena votes
63,102
Across 28 (subset, category) entries
Providers on OR
1
Darkbloom
First seen
2026-05-08
72 days tracked
Trend
Pricing
No priced fields.
Capabilities
Modality
text->textContext
131K tokens
Tokenizer
GPT
Knowledge cutoff
2024-06-30
Max output
33K tokens
Moderation
Unmoderated
Hugging Face
Supported parameters
frequency_penalty
include_reasoning
logprobs
max_tokens
presence_penalty
reasoning
reasoning_effort
repetition_penalty
response_format
seed
stop
structured_outputs
temperature
tool_choice
tools
top_k
top_logprobs
top_p
Providers
| Provider | Region / Tag | Context | Input/M | Output/M | Uptime 1d | Latency | Quant | Cache |
|---|---|---|---|---|---|---|---|---|
| Darkbloom | darkbloom | 131K | - | - | 96.14% | - | - | - |
Per-category ranks
Text
| Rank | Category | Variant | Trend | Elo | Votes |
|---|---|---|---|---|---|
| #151 | Korean | - | 1292 | 218 | |
| #152 | Japanese | - | 1263 | 233 | |
| #188 | Math | - | 1336 | 679 | |
| #190 | Industry Mathematical | - | 1330 | 583 | |
| #191 | Industry Medicine And Healthcare | - | 1352 | 561 | |
| #191 | Polish | - | 1277 | 780 | |
| #193 | Spanish | - | 1305 | 253 | |
| #196 | Chinese | - | 1348 | 488 | |
| #202 | Expert | - | 1318 | 490 | |
| #205 | Coding | - | 1369 | 2,168 | |
| #205 | Industry Business And Management And Financial Operations | - | 1322 | 1,849 | |
| #206 | German | - | 1270 | 208 | |
| #208 | Industry Software And It Services | - | 1358 | 3,707 | |
| #216 | Non English | - | 1269 | 5,546 | |
| #221 | Russian | - | 1301 | 605 | |
| #224 | Hard Prompts English | - | 1339 | 2,447 | |
| #226 | Exclude Ties | - | 1262 | 7,779 | |
| #228 | Hard Prompts | - | 1323 | 4,797 | |
| #229 | Overall | - | 1317 | 10,622 | |
| #230 | English | - | 1331 | 5,064 | |
| #230 | Industry Life And Physical And Social Science | - | 1328 | 1,683 | |
| #240 | Industry Legal And Government | - | 1322 | 694 | |
| #242 | Multi Turn | - | 1292 | 1,836 | |
| #244 | Longer Query | - | 1301 | 2,090 | |
| #246 | Instruction Following | - | 1281 | 2,554 | |
| #252 | Industry Entertainment And Sports And Media | - | 1256 | 1,746 | |
| #255 | Industry Writing And Literature And Language | - | 1274 | 2,179 | |
| #266 | Creative Writing | - | 1238 | 1,243 |