MathCode is a terminal-based AI coding assistant that converts plain-language mathematical problems into Lean 4 theorems and attempts to construct machine-verified proofs.
It features a persistent Lean REPL for rapid iterative feedback and maintains a library of reusable theorems and axioms to build a cumulative knowledge base.
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Persistent Lean 4 REPL for sub-second compilation checks
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Automatic translation of natural language to formal Lean theorems
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Reusable theorem and axiom library with dependency tracking
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Tree-of-subgoals decomposition for parallel proof exploration
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Obsidian vault generation for visualizing theorem-to-lemma dependencies
Open Source
The tool is free to install and use as an open-source project, but it requires an external API provider (such as OpenAI, Anthropic, or OpenRouter) which may incur usage costs based on the selected model.
Best for
Proof engineers and mathematicians requiring a verifiable, inspectable, and persistent system for formalizing and proving mathematical statements.
Not ideal for
General users seeking a casual question-answering system or those without the technical background to manage a local Lean 4 development environment.
MathCode is a powerful, research-oriented tool that shifts AI math solving from one-off answers to a persistent, verifiable environment, though its steep technical requirements limit it to specialized users.
Version 0.3.0 introduced persistent Lean feedback, refined agentic planning, and expanded CLI tools for axiom checking and proof statistics. Version 0.2.0 previously introduced prefix-cache request reshaping to reduce API costs by up to 90%.
As of
Is MathCode free?+
Yes - MathCode is Open Source. The tool is free to install and use as an open-source project, but it requires an external API provider (such as OpenAI, Anthropic, or OpenRouter) which may incur usage costs based on the selected model.
Is MathCode open source?+
Yes - MathCode is open source. The tool is free to install and use as an open-source project, but it requires an external API provider (such as OpenAI, Anthropic, or OpenRouter) which may incur usage costs based on the selected model.
Who is MathCode best for?+
Proof engineers and mathematicians requiring a verifiable, inspectable, and persistent system for formalizing and proving mathematical statements.
Who is MathCode not ideal for?+
General users seeking a casual question-answering system or those without the technical background to manage a local Lean 4 development environment.
What are the best MathCode alternatives?+
The closest MathCode alternatives on ai.dosa.dev are Claude Code, Codex CLI, Amp - all listed under Terminal & CLI Agents.
Who makes MathCode?+
MathCode is developed by Math-AI. It is listed in the Terminal & CLI Agents category on ai.dosa.dev.
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