Because they model this on Jev's API instead of OpenAI's version.
replyIt's an abbreviation for a "Bernoulli" random variable: https://en.wikipedia.org/wiki/Bernoulli_distribution
replyWas my question too. Apparently it is derived from Bernoulli (Can't find the source now).
replyJev's founder mentioned the background on the latent space podcast.
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