JMax

A math-native programming language for science, data, and visualization.

JMax is what you'd build if you started from "I want MATLAB / Julia / R / Mathematica, but as a single self-contained tool with no install dance and 2,500 functions built in." It's a complete data-science surface, linear algebra, signal processing, plotting, statistics, ML primitives, projected onto flowG so the same code runs on CPU, Apple-silicon Metal, or WebGPU.

This is the public release surface. Source is private at openIE-dev/jmax-core.

Try it in your browser, no install: play.charlot-lang.dev runs the JMax evaluator compiled to WebAssembly. Nothing leaves the page.

Status

Release binaries + examples + documentation. JMax is a free and open research project, released under MIT OR Apache-2.0 (see COPYRIGHT).

What you get

Binary	Purpose
jmax	The JMax CLI: REPL, file runner, formatter, MCP server

Install

JMax ships as a self-contained prebuilt binary, download the archive for your platform from the latest release (assets: jmax-<version>-<target>.tar.gz, with SHA-256 checksums):

V=0.1.0; T=aarch64-apple-darwin   # Apple silicon; pick your target
curl -fsSL "https://github.com/openIE-dev/jmax/releases/download/v$V/jmax-$V-$T.tar.gz" | tar xz
sudo mv "jmax-$V-$T/jmax" /usr/local/bin/ && jmax --version

Targets: aarch64-apple-darwin, x86_64-apple-darwin, x86_64-unknown-linux-musl, aarch64-unknown-linux-musl, x86_64-pc-windows-msvc. Full instructions in the install guide.

Platform support:

Platform	Status
macOS arm64 (Apple Silicon)	shipping
macOS x86_64	shipping
Linux x86_64 (musl)	shipping
Linux aarch64 (musl)	shipping
Windows x86_64	shipping
WASM (browser)	shipping

Hello, JMax

# Solve a linear system, look at the spectrum, return the determinant.
let A = [[2.0, 1.0], [1.0, 3.0]]
let b = [5.0, 10.0]
let x = A \ b            # -> [1, 3]
let spectrum = eig(A)    # -> [3.618, 1.382]
det(A)                   # -> 5

jmax run examples/hello/hello.jm     # -> 5.0

REPL:

jmax repl

See examples/ for linear algebra, signal processing, plotting, science notebooks, and the JMax → flowG projection.

What makes JMax different

• 2,500+ functions across 82 modules, all in one binary, linear algebra, FFT, optimization, statistics, ML primitives, file IO, plotting, nothing else to install. The reference documents the 113 most-used as top-level built-ins.
• .jm files run anywhere, same code on CPU, GPU, WGPU via flowG dispatch.
• Energy receipts, every workload optionally records picojoule-per-operation via the substrate-energy layer.
• MCP server built in, JMax exposes its computation surface as an MCP server (jmax mcp) so any LLM agent can route math through it.
• Pure Rust, no Python, no C++ shared libraries, no LAPACK or BLAS to install. JMax compiles to a single binary.

How it fits

JMax is the scientific-computing surface in the openIE-dev family:

• flowG, the substrate JMax compiles to
• Lux, general-purpose sibling
• Joule, energy-budgeted compiled sibling
• JouleDB, the metered database for persistence

Documentation

The documentation site and the GitHub Pages book mirror each other:

	Website	GitHub Pages
Home / language	charlot-lang.dev	openie-dev.github.io/jmax
Docs & function reference	docs.charlot-lang.dev	/reference/builtins
jmax CLI reference	api.charlot-lang.dev	/reference/cli
Browser playground	play.charlot-lang.dev	,

• Examples → examples/
• Source mirror → openIE-dev/jmax-core

Releases

GitHub Releases, tagged versions with prebuilt binaries for every supported platform, plus SHA-256 checksums.

Community

• Discussions, Q&A, function requests
• Issues, bug reports
• Security: see SECURITY.md

License

Copyright (c) 2026 Open Interface Engineering, Inc. Licensed under either of Apache License, Version 2.0 (LICENSE-APACHE) or the MIT license (LICENSE-MIT), at your option, for the binaries, the documentation and the examples. Earlier releases and earlier versions of this README described the binaries as Business Source License 1.1; that no longer applies.