OpenAI Just Released Its First Open-Weight Models Since GPT-2

OpenAI has released its first open-weight models in over five years, gpt-oss-120b and gpt-oss-20b. These models have publicly available weights, allowing them to be run locally on consumer devices and fine-tuned for specific purposes. Available under an Apache 2.0 license, the models utilize chain-of-thought reasoning, can execute code, and browse the web. This release represents a strategic shift for the company, complementing its proprietary models and addressing the growing open-weight model landscape. Performance benchmarks for the larger model are reportedly comparable to OpenAI's proprietary o3 and o4-mini models.