Decoding Large Language Models: Predicting Text with Transformers
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In this riveting exploration, the 3Blue1Brown team delves into the fascinating world of large language models like GPT-3, where predicting the next word is akin to a high-stakes game of probability. These models, with their mind-boggling number of parameters, undergo intense training by processing vast amounts of text - so much so that if a human attempted to read it all, it would take over 2600 years! But fear not, for these models aren't just about spewing out gibberish; they are refined through backpropagation to make more accurate predictions over time. It's like tuning the dials on a massive machine, tweaking parameters to enhance the model's word-guessing prowess.
The sheer scale of computation involved in training these language models is nothing short of jaw-dropping. Imagine performing one billion additions and multiplications every second - it would still take well over 100 million years to complete all the operations required for training. But wait, there's more! Pre-training is just the beginning; chatbots also undergo reinforcement learning with human feedback to fine-tune their predictions. Workers flag unhelpful suggestions, prompting adjustments to the model's parameters to cater to user preferences. It's a relentless cycle of improvement, ensuring that these AI assistants become more adept at understanding and responding to human interactions.
Enter the transformers, a groundbreaking model introduced by a team of researchers at Google in 2017. Unlike their predecessors, transformers process text in parallel, soaking in all the information at once. They associate each word with a list of numbers, using operations like attention to refine these numerical encodings based on context. The goal? To enrich the data and make accurate predictions about what word comes next in a passage. While researchers lay the groundwork for these models, the specific behavior emerges from the intricate tuning of parameters during training, making it a daunting task to decipher the exact reasoning behind the model's predictions. Despite the complexity, the predictions generated by these large language models are remarkably fluent, captivating, and undeniably useful.
Image copyright Youtube
Image copyright Youtube
Image copyright Youtube
Image copyright Youtube
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