Google CEO Sundar Pichai demos Duplex at I/O — an AI placing a phone call to a hair salon and negotiating an appointment. The uncanny-valley moment sparks ethics debate.

OpenAI announces its OpenAI Five bots for the full 5v5 Dota 2 game. Months of distributed training set up a showcase match at The International.

OpenAI releases GPT-1, a Transformer-based language model trained with unsupervised pre-training and supervised fine-tuning. Quiet release, enormous long-term impact.