100 Questions is a web based tool that performs a visibility audit across four major AI platforms: OpenAI, Claude, Gemini, and Grok. Its primary function is to identify where these models overlook a brand during user queries, which competitors appear instead, and which sources the models trust. The audit costs nine dollars and requires no subscription. Results are private by default, with a 30 day retention period for the stored answers. The audit delivers a set of metrics including visibility, prominence, share of voice, citations, and a grounding required assessment. It also lists missed buyer questions, the sources cited by the AI models, and five evidence backed actions to improve visibility. The tool presents these findings as a client ready report rather than a continuous monitoring dashboard. Users receive a benchmark example that shows current visibility percentages, coverage rates, owned citation counts, and eligible citations across each AI model. Typical use cases involve brand teams, marketers, or agencies who want a one time assessment of how their brand appears in AI generated responses. The workflow begins with the user submitting their brand information, after which the tool runs queries across the four AI models using their native web search capabilities. The output includes a structured breakdown by model, such as GPT 4.5 mini, Claude Sonnet 4.6, Gemini 3.1 Flash Lite, and Grok 4.5, along with the specific search backends used by each. No technical installation or ongoing commitment is required to access or interpret the results.