Blender is an open-domain chatbot developed at Facebook AI Research (FAIR), Facebook’s AI and machine learning division. According to FAIR, it is the first chatbot that has learned to blend several conversation skills, including the ability to show empathy and discuss nearly any topic, beating Google’s chatbot in tests with human evaluators.
Blender was trained using previously available public domain conversations including 1.5 billion conversation examples. The resulting neural network was too large to fit on a single device, so Facebook engineers split it into smaller pieces to make it scale to even larger datasets.

Skill blending is, as mentioned, one of Blender key features.

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