Llama 2 70B Chat

Meta put the weights and a commercial licence out on the same day, and a seventy-billion-parameter chat model that people quantised until it ran on a laptop stopped being a research artefact. Four thousand tokens of context was all it ever had. Amazon switched off its hosted copy in October 2024; the file it was serving is on a great many hard drives still.

Its safety tuning was tight enough that it declined ordinary requests, and the refusals became a genre of screenshot.