gpt-oss-120b and gpt-oss-20b are here. Developed with feedback from the open-source community, these models push the frontier of open models at their size. Hugging Face, NVIDIA, Ollama, vLLM, LM Studio and OpenAI have come together to host this six week hackathon. Your challenge is to apply these models in creative, unexpected ways: build a robot with reasoning, craft a local agent that thrives offline, fine-tune a model into something indispensable, or push the edge with the weirdest hardware you can imagine. Maybe your project will benefit humanity, or maybe it’ll be so unexpected it surprises everyone in the room. However you build, this is your moment to redefine what open models can do. Get Started
Both gpt-oss models are free to download on Hugging Face.
Learn more about the models: openai.com/open-models
Github: github.com/openai/gpt-oss
Check out this microsite of gpt-oss in action: gpt-oss.com
Online
OpenAI
$30,000