Open-source releaseHigh global significanceConfirmed confidence
OpenAI releases GPT-OSS
OpenAI's first hundred-billion-parameter foundation model released to the open-source community.
What happened
Event details
GPT-OSS is the first hundred-billion-scale foundation model OpenAI released to the open-source community. It is a 120B open-source autoregressive Transformer, released on August 5, 2025; the primary source is "Introducing gpt-oss."
Assessment
Why it matters
Rated on the impact-v1 six-axis scale: technical 4/5, market 4/5, ecosystem 4/5, policy & social 1/5, scope 4/5, durability 4/5.
79/100Global significance score. Regional effects are recorded only when the evidence supports a meaningful difference.