The AI Chatbot Showdown of 2025: Grok vs DeepSeek vs Perplexity
Grok-4, xAI’s chatbot, launched in July 2025 and is now integrated as a voice assistant in Tesla vehicles. In the same month, xAI secured a U.S. Department of Defense contract worth up to $200 million for Grok. DeepSeek’s R1 model, released January 2025, became the most-downloaded free iOS app in the U.S. and claims 96 million monthly users. Perplexity AI reached a $14–18 billion valuation in 2025 and drew acquisition interest from Apple.