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Perplexity AI is an AI-powered research and conversational search engine that answers queries using natural language predictive text. It is based in San Francisco, California . Founded in 2022, Perplexity generates answers using sources from the web and cites links within the text response. [ 2 ]
The perplexity is the exponentiation of the entropy, a more straightforward quantity. Entropy measures the expected or "average" number of bits required to encode the outcome of the random variable using an optimal variable-length code. It can also be regarded as the expected information gain from learning the outcome of the random variable ...
Perplexity makes money by offering a Pro version for $20 per month that allows users to pick from various large language models, among them OpenAI’s GPT-4, Anthropic’s Claude 2.1, or the ...
Mathematically, perplexity is defined as the exponential of the average negative log likelihood per token: = = (()) here is the number of tokens in the text corpus, and "context for token " depends on the specific type of LLM used.
Like a number of AI startups, Perplexity has managed to raise money in a tough environment. In 2023, $170.6 billion was invested across venture—that marks a decline of $71.6 billion from 2022 ...
(Reuters) -Japanese technology investor SoftBank Group Corp's Vision Fund 2 is investing between $10 million and $20 million in U.S. search startup Perplexity AI at a valuation of $3 billion ...
SK Telecom, South Korea's largest telco, is partnering with U.S. AI startup Perplexity to offer the artificial intelligence-based search engine to its users as an alternative to Google and Naver ...
negative log-likelihood per token (logarithm of perplexity) for language modeling. Elo rating in a competition against other models, such as gameplay [ 7 ] or preference by a human judge [ 8 ] Performance can be improved by using more data, larger models, different training algorithms, regularizing the model to prevent overfitting, and early ...
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