Study Finds Nine Major AI Services Hide Free Plan Message Limits From Users

A review of nine popular AI platforms — including ChatGPT, Gemini, Claude, and Grok — found that none publicly discloses a numeric cap on free-tier chat messages. Researchers preserved and timestamped 70 official pages from these services as of September 22, 2026, tying every documented value to its source. While companies maintain pricing pages and help centers, the relevant usage details are scattered, often undated, and subject to change without clear notice — one value changed during the research itself. Limits are typically described in vague terms such as "generous limits" or "practically unlimited," leaving users unable to anticipate when access will be cut off. The findings make no service recommendations but aim to document what each company discloses and, crucially, what it omits.