Hai Gaon

Hai Gaon, head of the Pumbedita academy, issued responsa across the Jewish world, weighing Talmudic precedent, local custom, and reason. His legal works, such as Sefer ha-Mekach u-Memkar, helped standardize commercial practice and modeled clarity in method, language, and sources.

Hai Gaon is best known as a religious leader. Babylonian Jewish sage, last of the Geonim, whose responsa and legal works guided a far-flung diaspora.

Hai Gaon lived 939-1038 CE, born in 939 and died in 1038, during the medieval period.

There is no verified IQ score for Hai Gaon — modern IQ testing only began in 1905, and the numbers attached to historical figures online are retrospective estimates, not real test results. Psychologists have occasionally published such estimates from biographical evidence, but historians treat them as speculation. The better measure of Hai Gaon's mind is the record itself, and you can explore it firsthand by asking the AI Hai Gaon how they thought through their hardest decisions.

Yes. Historiqly lets you chat with an AI Hai Gaon that responds in character and is grounded in their real life, work, and era. A good first question is: "How should I pose a halakhic question clearly?"