Although C is still a powerhouse programming language, C’s difficulty with large-scale projects knocked it down the index, especially compared with C++.

Rust and Kotlin slowly approach the top 10 while Python becomes increasingly untouchable.

The AI boom is starting to show up on the TIOBE Index by bringing back a formative programming language.

December 2025 TIOBE Index recap: Python dominates, C-C# hold steady, while SQL climbs, R enters the top 10, and Delphi/Object Pascal drops out.

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