Rankings / OpenAI
GPT OSS 20B
open weightsreleased 2025-08-05
BenchAtlas Index
as of 2026-07-14
high effort
rank #320
9 families · 5 categories · high
base configuration
rank #344
8 families · 4 categories · medium
low effort
rank #363
9 families · 5 categories · high
Benchmark evidence
56 results
agentic coding
| τ²-Bench | high effort | 60.2 % | independent | Artificial Analysis |
| τ²-Bench | low effort | 50.3 % | independent | Artificial Analysis |
| τ²-Bench subset=banking | high effort | 7.0 % | independent | Artificial Analysis |
coding
| LiveCodeBench v6 implementation=artificial-analysis | high effort | 77.7 % | independent | Artificial Analysis |
| LiveCodeBench v6 implementation=artificial-analysis | low effort | 65.2 % | independent | Artificial Analysis |
| SciCode | high effort | 34.4 % | independent | Artificial Analysis |
| SciCode | low effort | 34.0 % | independent | Artificial Analysis |
external indices
| AA Coding Index | high effort | 20.7 points | independent | Artificial Analysis |
| Intelligence Index v4.1 | high effort | 14.9 points | independent | Artificial Analysis |
| Intelligence Index v4.1 | low effort | 14.3 points | independent | Artificial Analysis |
| AA Math Index | high effort | 89.3 points | independent | Artificial Analysis |
| AA Math Index | low effort | 62.3 points | independent | Artificial Analysis |
factuality
| MASK contamination=Potential contamination warning: This model was evaluated after the public release of MASK, allowing model builder access to the prompts and solutions. | 86.5 % 84.4–88.5 | independent | Scale Labs |
human preference
| Coding (style control)older version arena=text · category=coding · style_control=true | 1369.5 1356.6–1382.4 | community | LMArena Leaderboard Dataset | |
| Industry Software And It Services (style control)older version arena=text · category=industry_software_and_it_services · style_control=true | 1358.5 1348.6–1368.4 | community | LMArena Leaderboard Dataset | |
| Industry Medicine And Healthcare (style control)older version arena=text · category=industry_medicine_and_healthcare · style_control=true | 1352.5 1326.7–1378.3 | community | LMArena Leaderboard Dataset | |
| Hard Prompts English (style control)older version arena=text · category=hard_prompts_english · style_control=true | 1338.6 1326.3–1350.8 | community | LMArena Leaderboard Dataset | |
| Math (style control)older version arena=text · category=math · style_control=true | 1335.8 1313.8–1357.9 | community | LMArena Leaderboard Dataset | |
| English (style control)older version arena=text · category=english · style_control=true | 1330.9 1322.3–1339.6 | community | LMArena Leaderboard Dataset | |
| Industry Mathematical (style control)older version arena=text · category=industry_mathematical · style_control=true | 1329.7 1305.7–1353.7 | community | LMArena Leaderboard Dataset | |
| Industry Life And Physical And Social Science (style control)older version arena=text · category=industry_life_and_physical_and_social_science · style_control=true | 1328.5 1313.4–1343.7 | community | LMArena Leaderboard Dataset | |
| Hard Prompts (style control)older version arena=text · category=hard_prompts · style_control=true | 1322.7 1313.8–1331.5 | community | LMArena Leaderboard Dataset | |
| Industry Legal And Government (style control)older version arena=text · category=industry_legal_and_government · style_control=true | 1322.1 1298.7–1345.5 | community | LMArena Leaderboard Dataset | |
| Industry Business And Management And Financial Operations (style control)older version arena=text · category=industry_business_and_management_and_financial_operations · style_control=true | 1321.7 1307.8–1335.6 | community | LMArena Leaderboard Dataset | |
| Overall (style control) arena=text · category=overall · style_control=true | 1317.3 1310.9–1323.6 | community | LMArena Leaderboard Dataset | |
| Russian (style control)older version arena=text · category=russian · style_control=true | 1301.5 1277.9–1325.0 | community | LMArena Leaderboard Dataset | |
| Longer Query (style control)older version arena=text · category=longer_query · style_control=true | 1300.7 1287.2–1314.1 | community | LMArena Leaderboard Dataset | |
| Non English (style control)older version arena=text · category=non_english · style_control=true | 1298.7 1290.5–1307.0 | community | LMArena Leaderboard Dataset | |
| Multi Turn (style control)older version arena=text · category=multi_turn · style_control=true | 1291.8 1277.5–1306.0 | community | LMArena Leaderboard Dataset | |
| Instruction Following (style control)older version arena=text · category=instruction_following · style_control=true | 1281.2 1269.0–1293.3 | community | LMArena Leaderboard Dataset | |
| Polish (style control)older version arena=text · category=polish · style_control=true | 1276.5 1254.0–1299.0 | community | LMArena Leaderboard Dataset | |
| Industry Writing And Literature And Language (style control)older version arena=text · category=industry_writing_and_literature_and_language · style_control=true | 1273.5 1260.4–1286.7 | community | LMArena Leaderboard Dataset | |
| Exclude Ties (style control)older version arena=text · category=exclude_ties · style_control=true | 1261.9 1252.9–1270.9 | community | LMArena Leaderboard Dataset | |
| Industry Entertainment And Sports And Media (style control)older version arena=text · category=industry_entertainment_and_sports_and_media · style_control=true | 1256.5 1241.5–1271.5 | community | LMArena Leaderboard Dataset | |
| Creative Writing (style control)older version arena=text · category=creative_writing · style_control=true | 1238.3 1220.1–1256.6 | community | LMArena Leaderboard Dataset |
knowledge science
| GPQA Diamond implementation=vals-ai | 68.9 % | independent | Vals AI | |
| GPQA Diamond implementation=artificial-analysis | high effort | 68.8 % | independent | Artificial Analysis |
| GPQA Diamond implementation=artificial-analysis | low effort | 61.1 % | independent | Artificial Analysis |
| Humanity's Last Exam implementation=artificial-analysis | high effort | 9.8 % | independent | Artificial Analysis |
| Humanity's Last Exam implementation=artificial-analysis | low effort | 5.1 % | independent | Artificial Analysis |
| MMLU-Pro implementation=artificial-analysis | high effort | 74.8 % | independent | Artificial Analysis |
| MMLU-Pro implementation=artificial-analysis | low effort | 71.8 % | independent | Artificial Analysis |
| MMLU-Pro implementation=vals-ai | 71.6 % | independent | Vals AI |
long context instruction
| AA-LCR | low effort | 31.0 % | independent | Artificial Analysis |
| AA-LCR | high effort | 30.7 % | independent | Artificial Analysis |
| IFBench | high effort | 65.1 % | independent | Artificial Analysis |
| IFBench | low effort | 57.8 % | independent | Artificial Analysis |
professional
| CaseLaw | 43.8 % | independent | Vals AI | |
| CorpFin | 53.1 % | independent | Vals AI | |
| LegalBench | 70.8 % | independent | Vals AI | |
| MedQA | 82.9 % | independent | Vals AI | |
| TaxEval | 63.7 % | independent | Vals AI |
reasoning math
| AIME year=2025 · implementation=artificial-analysis | high effort | 89.3 % | independent | Artificial Analysis |
| AIME implementation=vals-ai | 86.0 % | independent | Vals AI | |
| AIME year=2025 · implementation=artificial-analysis | low effort | 62.3 % | independent | Artificial Analysis |
| MATH-500 implementation=vals-ai | 94.2 % | independent | Vals AI |
Agent + model results
systems, not bare-model scores
| agent + model Artificial Analysis harness + GPT OSS 20B | Terminal-Bench 2.1 | 13.9 % | independent | Artificial Analysis |
| agent + model Artificial Analysis harness + GPT OSS 20B | Terminal-Bench Hard | 10.6 % | independent | Artificial Analysis |
| agent + model Artificial Analysis harness + GPT OSS 20B | Terminal-Bench Hard | 4.5 % | independent | Artificial Analysis |
These scores measure the whole agent system (scaffold, tools, budgets) — they are never merged into the bare model’s numbers.