gpt-oss: OpenAI validates the open ecosystem (finally)

OpenAI released gpt-oss-20B and gpt-oss-120B, two open-weight, text-only reasoning models under the Apache 2.0 license, with the larger model achieving near-parity with OpenAI o4 mini on core reasoning benchmarks, according to the article. The author, Nathan Lambert, writes that the release marks a major shift in OpenAI's open model strategy and undercuts some of its own API products, and that it could strengthen the U.S. position relative to China's open models. He notes that OpenAI did not release training data, code, base models, or a technical report, and he raises open questions about finetunability, tool-use hallucinations, and the need to reproduce the benchmark results on open infrastructure.