ChatGPT vs Grok
The comparison
On App Store, Grok scores higher (4.9/5 vs 4.8/5), from a smaller review base (1,257,605 vs 8,951,821 ratings).
As of Jul 30, 2026, ChatGPT is rated 4.8/5 on App Store (8,951,821 ratings); Grok is rated 4.9/5 on App Store (1,257,605 ratings). No source is blended; each stands on its own.