Le Chaton Fat

Le Chaton Fat is a language model that reportedly achieved a 90.6% score on the MMLU-Pro benchmark, a result that has sparked intense discussion and skepticism on AI Twitter. The name, French for 'the fat cat,' appears to be a playful alias, possibly for a new or unreleased model. The high score, if verified, would place it among the top-performing models on this challenging benchmark, which tests knowledge across 57 subjects. However, the evidence is currently limited to a single viral post on X (formerly Twitter), and no official documentation, model card, or API has been released. The community reaction suggests a mix of amusement and doubt, with many questioning the legitimacy of the result. Based on community signals so far, Le Chaton Fat may be a hoax, a leaked internal model, or a benchmark overfit. Until more concrete evidence emerges—such as a paper, model release, or independent verification—its true nature remains uncertain. This term is trending due to the viral nature of the claim and the strong reactions it has provoked.

A single X post claiming a 90.6% MMLU-Pro score went viral, causing widespread discussion and skepticism in the AI community.