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TrueMath is a deterministic mathematical execution engine. It is built to run in partnership with large language models in the AI stack: the model reasons about a request and parses intent, and TrueMath performs the actual calculation — deterministically, at full precision, with provenance for every value, against versioned business logic. When someone asks “what would my monthly payment be if I put 15% down instead of 20%,” an LLM understands the question and identifies the values involved. TrueMath computes the answer and records how it got there.
LLMs reason. TrueMath executes. This is a division of responsibility, not a competition. See How TrueMath fits with LLMs.

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What TrueMath is not

TrueMath is not a better calculator, and it is not a smarter language model. It is execution infrastructure — the layer where correctness, reproducibility, and auditability are enforced. A language model predicts likely text; TrueMath computes guaranteed results. The two solve different problems, and TrueMath is built for the one where “close” is not acceptable.

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How you work with it

You organize calculations into domains — collections of variables (the values you calculate with) and activities (the equations that relate them). TrueMath ships a library of pre-built domains, and you can author your own. A calculation runs inside a conversation. You provide values — in natural language or as structured input — and name what you want to solve for. TrueMath returns the result along with every variable’s value, unit, and provenance. Adjusting an input creates a new scenario, so you can explore what-if questions without losing prior work. You can use TrueMath three ways:
  • The Playground — an interface for entering prompts and exploring calculations. Results are presented visually rather than narrated in prose — tables as tables, charts as charts — with the full underlying data available on demand.
  • The Builder — an environment for authoring domains.
  • The API — call TrueMath over HTTP from your own application or agent.

Quickstart

Run your first calculation in the Playground and through the API.

Core concepts

Domains, activities, variables, provenance, and scenarios.

The guarantees

What “deterministic execution” actually gives you.

API reference

Authenticate, run calculations, and read domains over HTTP.