OpenAI Help: Lockdown Mode(simonwillison.net)
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Simon Willison covers OpenAI's Lockdown Mode feature.
Simon Willison covers OpenAI's Lockdown Mode feature.
OpenAI's first open-weight LLMs since GPT-2 (2019). Apache 2.0 license. Trained with RL and distillation from o3 and frontier internal models. GPT-oss-120B runs on single 80GB GPU; 20B runs on 16GB edge devices.