GPT-OSS-20B: gPQA Diamond now reports OpenAI’s published launch result of 71.5%; evaluation settings may differ from other published results

The OnAirToday AI Progress Tracker recorded a verified change to OpenAI's GPT-OSS-20B (version gpt-oss-20b): GPQA Diamond now reports OpenAI’s published launch result of 71.5%; evaluation settings may differ from other published results.

GPT-OSS-20B is OpenAI’s Apache 2.0–licensed, open-weight reasoning model, supporting text generation, tool use and adjustable reasoning effort. Its mixture-of-experts architecture supports local deployment, with the released quantization designed to fit within approximately 16 GB of memory.

What changed in this review:

• Added OpenAI’s published SWE-bench Verified launch result of 60.7%.
• Removed the unverified OTIS Mock AIME and Terminal-Bench entries.
• Cleared token prices: the open-weight release has no single provider-independent input or output rate.

Teams building on GPT-OSS-20B should confirm limits, pricing and benchmark coverage against the vendor's own documentation before relying on these figures.

The full profile — capabilities, benchmark citations, known flaws and risk guidance — is on the tracker at /ai-models/gpt-oss-20b.

References:

• https://openai.com/index/introducing-gpt-oss/
• https://huggingface.co/openai/gpt-oss-20b
• https://github.com/openai/gpt-oss