Model coverage matters because buyers do not stick to one engine. A team that only tracks ChatGPT misses the picture on Perplexity-using technical buyers and Gemini-using Google-account-bound buyers. Profound leads on raw engine count, while Qwairy covers more than 10 providers, including Google AI Overviews, AI Mode, Copilot, Grok, Claude, DeepSeek, and Mistral.
AEO glossary
Model coverage
Model coverage is the count of AI engines an AEO tool monitors, at minimum ChatGPT, Perplexity, Gemini, and AI Overviews; ideally also Claude, Copilot, Grok, Meta AI, and DeepSeek.