Jaithon 3: A Fast Language with the Perfect Syntax

Jaithon 3, a fast programming language with the perfect syntax

Jaithon 3 is a dynamically executed, garbage-collected language with a bytecode VM, drawing architecture from Java and syntax from Rust and Python. It is heavily bootstrapped, with most features written in Jaithon itself. The project leverages AI-assisted coding (about 80% of raw code) while maintaining human oversight for design and architecture. It includes a REPL, formatter, type checker, and packages like jaiplot and jaitensor for GPU-accelerated ML.

Without agentic coding, Jaithon 3 probably wouldn't have existed, and Jaithon would have been stuck at a primal level.
  1. AbhiramaVS

    Hi HN! I’m Abhirama, and I started Jaithon in 2023 when I was in 8th grade to teach myself how to code in C. Jaithon 1 was really bad, it was all in one file and it was completely an interpreter and it was extremely slow with bugs everywhere. Recently, I have came back to this project with the goal of making the perfect programming language that is not only fast, but it has the optimal syntax & features out of every programming language.

    Jaithon has Python features such as comprehensions, f-strings and first-class functions with declared fields, explicit visibility, traits and checked type annotations, along with syntax choices from lua, Java, bash, c++, go, and rust.

    The compiler separates lexing, parsing, type checking and bytecode generation. The VM has 107 opcodes along with a JIT compiler to speed stuff up, polymorphic inline caches and a garbage collector.

    Jaithon is nearly completely bootstrapped, with the lexer, parser, and bytecode generation built completely within Jaithon itself. The syntax of jaithon code is also easily customizable.

    You can build and run it with:

    git clone https://github.com/abhiramasonny/jaithon

    cd jaithon

    make

    ./jaithon examples/hello.jai

    It would mean a lot if you star the project on my GH as I am trying to reach 15 stars soon :) anyways, lmk if you have any feedback. Currently Jaithon is between Java and C++ for speed (a more detailed benchmark exists within the project by running make benchmark) and I am in the process of optimizing the VM. […]

  2. andai

    Note: Unrelated to the Jai programming language (but they both use .jai file extension).

  3. abhinai

    This language keeps the best parts of Python while discarding the bad. I clicked the link apprehensively, but I have to agree that this syntax is spot-on (for me, at least). So many new languages miss the mark.

  4. mixmastamyk

    Neat, looks more like Rust than Java or Python on the surface though. That’s good in general.

    Also am slightly dismayed that new langs are copying the f-string, which was chosen only because Python had no more Ascii punctuation chars left for such a feature. Would much recommend shell-style quote syntax instead, perhaps omitting $.

  5. IshKebab

    Yes!! I love that you detailed AI usage in the readme. This should be 100% standard, even if you don't use AI at all, you need to say so these days.

    At the point where you add a license, add an AI usage section to your readme. This is a perfect example.

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2026-08-15