In a move that signifies a pivotal shift in its strategy, OpenAI officially released two state-of-the-art, open-weight language models, GPT-OSS 20B and GPT-OSS 120B, on August 5, 2025. This release marks OpenAI’s first foray into providing fully open-weight models since GPT-2, making powerful AI capabilities more accessible to developers, researchers, and enterprises under the permissive Apache 2.0 license.