OpenAI: gpt-oss-20b

Name: OpenAI: gpt-oss-20b
Price: 0.14 USD
Author: openai

OpenAI: gpt-oss-20b is openai's model. It is not yet scored on the meo first-party benchmark; aggregated third-party results and OpenRouter metadata are shown below.

Aggregated third-party benchmarks

Benchmark	Value	Source
AA Coding Index	19	artificial_analysis
AA Intelligence Index	25	artificial_analysis
AA Math Index	89	artificial_analysis
AIME 2025	89.3%	artificial_analysis
GPQA Diamond	68.8%	artificial_analysis
Humanity's Last Exam	9.8%	artificial_analysis
IFBench	65.1%	artificial_analysis
LCR (long-context reasoning)	30.7%	artificial_analysis
LiveCodeBench	77.7%	artificial_analysis
MMLU-Pro	74.8%	artificial_analysis
SciCode	34.4%	artificial_analysis
τ²-bench	60.2%	artificial_analysis
Terminal-Bench Hard	10.6%	artificial_analysis
Median output throughput (tokens/s)	268	artificial_analysis
Median time to first token (s)	0.42	artificial_analysis

Artificial Analysis (artificialanalysis.ai). Redistribution requires an AA commercial license.

Model details

Lab: openai
Released: 2025-08-05
Weights: Open
Context: 131K
Max output: —
Knowledge cutoff: 2024-06-30
Price in: $0.03/M
Price out: $0.14/M
Modality: text->text

View on OpenRouter ↗Hugging Face ↗

Sources: openrouter · artificial_analysis

FAQ

Is OpenAI: gpt-oss-20b open weights?

Yes — OpenAI: gpt-oss-20b is released with open weights.