Google open-sourced TensorFlow, its machine learning framework, under the Apache 2.0 license. Announced by Jeff Dean and Rajat Monga, the release opened up the second-generation machine learning system Google had been using internally, along with its library, tools, tutorials, and examples. It improved on the previous DistBelief system in speed, scalability, and production readiness — twice as fast on some benchmarks — and was the same technology behind image search in Google Photos and Smart Reply in Gmail. The release decisively established the practice of sharing research as working implementations rather than papers alone, and vastly widened access to deep learning. PyTorch would later contest its lead, but at this point TensorFlow became the industry standard.