OpenAI Ships GPT-oss-120B and GPT-oss-20B — First Open-Weight Models From OpenAI, Now Supported in Ollama

GitHub·high signal

OpenAI has released two open-weight models — GPT-oss-120B and GPT-oss-20B — now supported in Ollama alongside DeepSeek, Kimi-K2.5, and GLM-5, marking the first time OpenAI has released models in the open-weight category. The move represents a significant strategic shift for a company that has resisted open-sourcing since GPT-2, and arrives as open-source models from Zhipu and Moonshot are competitive on cost and benchmarks. Details on training data, license terms, and capability benchmarks are still emerging.