Transformers, transformers, transformers
Transformers, transformers, transformers
Estimated Reading Time: 5 minutes
TL;DR
Today’s issue reviews a few advances in large transformer models this week from DeepMind and Google Research. Large transformers are now able to learn across a very broad range of tasks (visual, NLP, robotic control, arcade games and more) using one joint training regimen. In addition, advances in pre training strategies may allow for considerable additional performance improvements. The combination of these advances raises the possibility that large transformers could prove a durable substrate for intelligent agents.
Gato: A Generalist Agent?
DeepMind has released a new paper on Gato, a multi-modal multi-task transformer. This system trains one agent to execute a broad range of tasks by exploiting the ability of Transformer architectures to model text, images, and actions.
DeepMind plots the performance of Gato versus expert performance on a broad range of tasks. There’s a fairly steep drop where many tasks don’t exceed 60% of expert performance, suggesting there’s a lot of room for improvement. However, DeepMind’s analysis of scaling behavior suggests that Gato consistently improves with additional parameters. The current model has only 1.3 billion parameters, so a larger model could potentially do much better.
Unifying Language Learning Paradigms
Google research has a new intriguing preprint out proposing a unified pretraining objective for language models that combines multiple previous objectives found in the literature. The result model sets state of the art (SOTA) on an astounding 50 NLP tasks! Much of the theory of transformer systems is still quite obscure, which means that clever tricks can yield unexpectedly impactful results.
Is AGI Imminent?
Gato has spurred discussion of whether AGI is imminent (see hacker news). While fears of runaway intelligence may be premature, it is striking how scaled-up transformers are capable of solving tasks across a wide variety of domains. Combined with advances in hardware and new pre training regimes, we may soon see large transformer architectures capable of controlling standalone robotic agents.
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Credits
Author: Bharath Ramsundar, Ph.D.
Editor: Sandya Subramanian, Ph.D.