The Future of Life Institute’s March 2023 open letter “Pause Giant AI Experiments” opens with a specific request: “We call on all AI labs to immediately pause for at least 6 months the training of AI systems more powerful than GPT-4.” The threshold was pegged to GPT-4, which OpenAI had released days earlier, rather than to any model already in training. No such pause occurred.
The Pause letter asked for a six-month halt above GPT-4
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Last verified June 6, 2026