OpenAI’s success in overtaking Google with an artificial intelligence–powered chatbot has achieved what seemed impossible in the past: It has forced the two AI research teams within Google’s parent, Alphabet, to overcome years of intense rivalry to work together.

Software engineers at Google’s Brain AI group are working with employees at DeepMind, an AI lab that is a sibling company within Alphabet, to develop software to compete with OpenAI, according to two people with knowledge of the project. Known internally as Gemini, the joint effort began in recent weeks, after Google stumbled with Bard, its first attempt to compete with OpenAI’s chatbot.

The release of Bard was also marred internally by the resignation of a prominent Google AI researcher who had raised red flags about its development to Alphabet CEO Sundar Pichai and other executives.