GPT-OSS is OpenAI’s first open-weight model in six years. OpenAI is releasing a new open-weight model dubbed GPT-OSS that can be downloaded for free, be customized, and even run on a laptop.

OpenAI’s new open-weight models are gpt-oss-120b and gpt-oss-20b. The smaller model, gpt-oss-20b, can be run on a consumer laptop or powerful phone.

The new OpenAI models come in two variants (120b and 20b) to run on less powerful hardware configurations. Both are transformers with a configurable chain of thought (CoT), supporting low, medium, and high settings.