TIOBE Index for December 2025: R Joins the Top 10 as SQL Climbs

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December’s TIOBE Index closes the year with a steady upper tier and a few late surprises in the lower ranks.

Python remains ahead at 23.64%, while the familiar chase group behind it holds steady for the moment. The real movement comes deeper in the list, where SQL edges upward, R rises to the top 10, and Delphi/Object Pascal slips away.

The TIOBE Programming Community Index tracks the popularity of programming languages using search engine data.

A quiet month at the front

Python’s slight month-to-month dip in November reverses, keeping its lead untouchable. C stays in second ...