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The initial reactions to OpenAI’s landmark open source gpt-oss models are highly varied and mixed
The verdict, for now, is split. OpenAI’s gpt-oss models are a landmark in terms of licensing and accessibility.
He praised their strong performance on reasoning and STEM-heavy benchmarks, and hailed the new “Harmony” prompt template format — which offers developers more structured terms for guiding model responses — and support for third-party tool use as meaningful contributions. In a lengthy X post, Clem Delangue, CEO and co-founder of AI code sharing and open source community Hugging Face, encouraged users not to rush to judgment, pointing out that inference for these models is complex, and early issues could be due to infrastructure instability and insufficient optimization among hosting providers. Even more cautious was Wharton School of Business at the University of Pennsylvania professor Ethan Mollick, who wrote on X that “The US now likely has the leading open weights models (or close to it)”, but questioned whether this is a one-off by OpenAI.
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