Model profile
GPT-OSS 20B
Evidence coverage
18 of 321 tracked benchmarks are published. 1 is verified and 17 provisional. 6 of 8 categories are measured.
- Published / tracked
- 18 / 321
- Verified
- 1
- Provisional
- 17
- Categories with evidence
- 6 / 8
Evidence by category
- Agentic5 benchmarksReported
- Coding3 benchmarksMixed evidence
- Reasoning2 benchmarksReported
- Knowledge6 benchmarksReported
- Math0 benchmarksNot measured
- Multilingual0 benchmarksNot measured
- Multimodal1 benchmarkReported
- Inst. Following1 benchmarkReported
GPT-OSS 20B ranks #159 out of 200 models on the public leaderboard with an overall score of 42.74/100. It also ranks #75 out of 99 on the verified leaderboard. While not a frontier model, it offers specific advantages depending on the use case.
GPT-OSS 20B is a open weight model with a 128K token context window. It processes queries without explicit chain-of-thought reasoning, offering faster response times and lower token usage.
GPT-OSS 20B sits inside the GPT-OSS family alongside GPT-OSS 120B. This profile currently has 18 of 321 tracked benchmarks. BenchLM only exposes non-generated benchmark rows publicly, so missing categories stay blank until a sourced evaluation is available.
Its strongest category is Agentic (#101), while its weakest is Coding (#104). This performance profile makes it particularly useful for coding agents, browser research, and computer-use workflows.
Peer position
Exact provisional scores and ranks for the closest listed peers. A score can appear before a model clears the evidence threshold for a rank, so equal scores can have different rank states.
Range 42.06–43.2
- Gemma 4 E4BGoogleCompare#15543.2Gemma 4 E4B is #155 with a score of 43.2.
- Mistral Medium 3MistralCompare#15643.2Mistral Medium 3 is #156 with a score of 43.2.
- Sarvam 105BSarvamCompare#15742.97Sarvam 105B is #157 with a score of 42.97.
- Claude 4 SonnetAnthropicCompare#15842.79Claude 4 Sonnet is #158 with a score of 42.79.
- GPT-OSS 20BCurrent modelOpenAI#15942.74GPT-OSS 20B is #159 with a score of 42.74.
- DeepSeek R1 Distill Qwen 32BDeepSeekCompare#16042.58DeepSeek R1 Distill Qwen 32B is #160 with a score of 42.58.
- GPT-4.1 nanoOpenAICompare#16142.06GPT-4.1 nano is #161 with a score of 42.06.
Category percentile
More
Relative position among models eligible for each sourced category. A higher percentile means a stronger position within that category's ranked cohort; 100 is highest.
- Agentic15%Eligible cohort rank #101 of 119Category score 37.4
- Coding15%Eligible cohort rank #104 of 122Category score 40.7
Category evidence
Scores and ranks appear only where this model has published benchmark evidence. Categories without displayable source records remain not measured.
| Category | Score | Rank | Percentile | Weight | Benchmarks | Evidence |
|---|---|---|---|---|---|---|
| AgenticRank #101 of 119Percentile 15thWeight 22%5 benchmarksReported | 37.4 | #101 of 119 | 15th | 22% | 5 benchmarks | Reported |
| CodingRank #104 of 122Percentile 15thWeight 20%3 benchmarksMixed sources | 40.7 | #104 of 122 | 15th | 20% | 3 benchmarks | Mixed sources |
| ReasoningRank Not rankedWeight 17%2 benchmarksReported | 48.0 | Not ranked | Not available | 17% | 2 benchmarks | Reported |
| KnowledgeRank Not rankedWeight 12%6 benchmarksReported | 23.6 | Not ranked | Not available | 12% | 6 benchmarks | Reported |
| MathWeight 5%0 benchmarksNot measured | Not measured | Not ranked | Not available | 5% | 0 benchmarks | Not measured |
| MultilingualWeight 7%0 benchmarksNot measured | Not measured | Not ranked | Not available | 7% | 0 benchmarks | Not measured |
| MultimodalRank Not rankedWeight 12%1 benchmarkReported | 35.4 | Not ranked | Not available | 12% | 1 benchmark | Reported |
| Inst. FollowingRank Not rankedWeight 5%1 benchmarkReported | 67.0 | Not ranked | Not available | 5% | 1 benchmark | Reported |
Chatbot Arena performance
Scroll horizontally to inspect confidence intervals and vote counts.
| View | Elo | Confidence interval | Votes |
|---|---|---|---|
| Text Overall | 1317 | ±6.4 | 10,622 |
| Coding | 1369 | ±12.9 | 2,168 |
| Math | 1336 | ±22.0 | 679 |
| Instruction Following | 1281 | ±12.1 | 2,554 |
| Creative Writing | 1238 | ±18.3 | 1,243 |
| Multi-turn | 1292 | ±14.3 | 1,836 |
| Hard Prompts | 1323 | ±8.8 | 4,797 |
| Hard Prompts (English) | 1339 | ±12.3 | 2,447 |
| Longer Query | 1301 | ±13.4 | 2,090 |
Benchmark Details
Rows below have a displayable published verification record. Each source link and provenance note remains in the page HTML while its category is closed. Source-unverified manual rows and generated rows stay hidden.
Agentic5 benchmarks
Artificial Analysis Agentic Index
τ²-Bench Tool-Agent-User Evaluation
GDPval-AA normalized
Coding3 benchmarks
Artificial Analysis Coding Index
Artificial Analysis SciCode
Reasoning2 benchmarks
Artificial Analysis Long Context Reasoning
Critical Physics Tasks
Knowledge6 benchmarks
Artificial Analysis GPQA Diamond
Artificial Analysis Humanity's Last Exam
Artificial Analysis Omniscience Index
Artificial Analysis Omniscience Accuracy
Artificial Analysis Omniscience Hallucination Rate
Multimodal1 benchmark
Design Arena Website Elo
Inst. Following1 benchmark
Artificial Analysis IFBench
Frequently Asked Questions
How does GPT-OSS 20B perform overall in AI benchmarks?
GPT-OSS 20B has 18 published benchmark scores on BenchLM, but it does not yet have enough non-generated coverage to receive a global overall rank.
Is GPT-OSS 20B good for knowledge and understanding?
GPT-OSS 20B has visible benchmark coverage in knowledge and understanding, but BenchLM does not currently assign it a global category rank there.
Is GPT-OSS 20B good for coding and programming?
GPT-OSS 20B ranks #104 out of 122 models in coding and programming benchmarks with an average score of 40.7. There are stronger options in this category.
Is GPT-OSS 20B good for reasoning and logic?
GPT-OSS 20B has visible benchmark coverage in reasoning and logic, but BenchLM does not currently assign it a global category rank there.
Is GPT-OSS 20B good for agentic tool use and computer tasks?
GPT-OSS 20B ranks #101 out of 119 models in agentic tool use and computer tasks benchmarks with an average score of 37.4. There are stronger options in this category.
Is GPT-OSS 20B good for multimodal and grounded tasks?
GPT-OSS 20B has visible benchmark coverage in multimodal and grounded tasks, but BenchLM does not currently assign it a global category rank there.
Is GPT-OSS 20B good for instruction following?
GPT-OSS 20B has visible benchmark coverage in instruction following, but BenchLM does not currently assign it a global category rank there.
Is GPT-OSS 20B open source?
Yes, GPT-OSS 20B is an open weight model created by OpenAI, meaning it can be downloaded and run locally or fine-tuned for specific use cases.
Which sibling models are related to GPT-OSS 20B?
GPT-OSS 20B belongs to the GPT-OSS family. Related variants on BenchLM include GPT-OSS 120B.
Does GPT-OSS 20B have full benchmark coverage on BenchLM?
Not yet. GPT-OSS 20B currently has 18 published benchmark scores out of the 321 benchmarks BenchLM tracks. BenchLM only exposes non-generated public benchmark rows, so missing categories stay blank until a sourced evaluation is available.
What is the context window size of GPT-OSS 20B?
GPT-OSS 20B has a published context window of 128K, which determines how much text it can process in a single interaction.
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