Thomas Dimson and Joey Flynn launched the website In the Weights to evaluate how artificial intelligence models recognize public figures. The website queries multiple large language models and aggregates their results.

In the Weights queries AI models such as Grok, Gemini, various versions of GPT, Claude, and Llama. The models receive a prompt requesting up to 10 results with a short description and a confidence score for a given name. The website then clusters similar descriptions and assigns a strength score; it also displays which models returned specific answers for a given name and highlights potential hallucinations in model responses.

Dimson and Flynn created In the Weights after leaving OpenAI. They had previously joined OpenAI through the acquisition of their design startup, Global Illumination. Dimson stated that he and Flynn built the website to "get the creative juices flowing again" after their departure. He also indicated that the site's direction was influenced by a blog post referencing Terry Bisson's short story "They're Made Out of Meat."

The name "In the Weights" refers to the numerical parameters that shape an AI model's training and output. Dimson stated that "Google vanity searches are the wrong objective in 2026 as more traffic moves to LLMs." On June 20, 2026, Macaulay Culkin held the top position on the In the Weights leaderboard with a strength score of 988, with Luciano Pavarotti having a comparable score.

Dimson reported that the reception for the website has been strong. "Reception has been insane so far, we thought this would be a mild curiosity but it seems like it has struck a nerve of wanting to see if you live forever in the super intelligence (the comparison factor doesn't hurt either!)," Dimson said. However, AI critic Anthony Moser described In the Weights as "literally the same as asking 13 chatbots to tell you about yourself." Dimson plans to analyze why different models within the same series produce varied results, how models are biased towards different types of people, and which individuals should have a Wikipedia article but do not.