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Model releaseFrontierUSConfirmed

OpenAI releases gpt-oss, its first open-weights language models since GPT-2

See how this story connects

Source: OpenAI

OpenAI released gpt-oss-120b and gpt-oss-20b under the Apache 2.0 licence. It said the larger model nears o4-mini on core reasoning benchmarks and runs on a single 80 GB GPU, and the smaller one matches o3-mini on common benchmarks and runs on devices with 16 GB of memory.

Why it matters

Companies and governments wanting OpenAI-grade reasoning on their own hardware could run it locally under a permissive licence.

When
5 Aug 2025
ID
WTA-N-2025-0187
Who
OpenAI

Summary by wheresthe.ai, from OpenAI. Checked against the source on 9 Oct 2026.

Read the original at OpenAI

Source copy: download the page text as saved on 18 Oct 2026 (PDF). Also held by the Internet Archive.

Earlier in this Storyline: What led hereDeepSeek releases R1 reasoning model with open weights under MIT licence

Cite this story

WTA-N-2025-0187: “OpenAI releases gpt-oss, its first open-weights language models since GPT-2.” wheresthe.ai, 5 Aug 2025. https://wheresthe.ai/d/openai-gpt-oss-open-weights-2025-08/ (source: OpenAI).

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