GPT OSS 20B
The gpt-oss-20b model (technically 20.9B parameters) achieves near-parity with OpenAI o4-mini on core reasoning benchmarks, while running efficiently on a single 80 GB GPU. The gpt-oss-20b model delivers similar results to OpenAI o3‑mini
Benchmarks
Arena Performance
GPT OSS 20B Performance Across Datasets
Scores sourced from the model's scorecard, paper, or official blog posts
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FAQ
Common questions about GPT OSS 20B
GPT OSS 20B was released on August 5, 2025 by OpenAI.
GPT OSS 20B was created by OpenAI.
GPT OSS 20B has 20.9 billion parameters.
GPT OSS 20B is released under the Apache 2.0 license. This is an open-source/open-weight license.