FrontierThe story, in brief
gpt-oss-120b & gpt-oss-20b Model Card
OpenAI just open-sourced two reasoning models under Apache 2.0. Here's why that changes everything.
The KeyNews take
Why it matters
OpenAI releasing open-weight reasoning models (120B and 20B parameters) under permissive Apache 2.0 licensing signals a major shift in competitive strategy—making frontier reasoning capabilities accessible to the broader developer ecosystem rather than gatekeeping behind API walls.
The key facts
5 to knowTwo models released: gpt-oss-120b and gpt-oss-20b
License: Apache 2.0 (permissive open-source)
Capability focus: reasoning models
Open-weight distribution (not just API access)
Published August 5, 2025
Go to the source
OpenAI Blogopenai.com
Publisher excerpt: We introduce gpt-oss-120b and gpt-oss-20b, two open-weight reasoning models available under the Apache 2.0 license and our gpt-oss usage policy.