5th August 2025 The long promised OpenAI open weight models are here, and they are very impressive. They’re available under proper open source licenses—Apache 2.0—and come in two sizes, 120B and 20B. OpenAI’s own benchmarks are eyebrow-raising—emphasis mine: The gpt-oss-120b model achieves near-parity with OpenAI o4-mini on core reasoning benchmarks, while running efficiently on a single 80 GB GPU. The gpt-oss-20b; model delivers similar results to OpenAI o3‑mini on common benchmarks and can run...