OpenAI launches 'open-weight language models' - What's big deal? AI giant OpenAI Tuesday launched two open-weight language models, gpt-oss-120b and gpt-oss-20b, with Sam Altman calling them a big dealWednesday August 6, 2025 1:50 PM , ummid.com News NetworkAI giant OpenAI Tuesday launched two open-weight language models, gpt-oss-120b and gpt-oss-20b, with Sam Altman calling them a big deal. An open-weight model, in the context of generative AI, is one in which the trained parameters are made public, allowing users to fine-tune it. "A Big Deal"While announcing the launch of the free downloadable AI models, OpenAI founder Sam Altman writing on X said "gpt-oss is a big deal”. “This is the first time that we’re releasing an open-weight model in language in a long time, and it’s really incredible,” OpenAI co-founder and president Greg Brockman told journalists during a briefing.