# google-research/dex-lang

Research language for array processing in the Haskell/ML family

Repository: https://github.com/google-research/dex-lang
Canonical: https://ross.abutalabs.com/products/dex-lang
Language: Haskell
License: BSD-3-Clause
License Family: permissive
Last push: 2026-01-05T14:37:26+00:00

## Health v2 (maintenance only)
Score: 59/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 60, release rhythm 35, longevity 100
- inputs: {"age_days": 2504, "days_push": 240, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1696, forks 116 (observed 2026-08-28T04:05:23.893931+00:00)

## What it is
Dex is an experimental research programming language from Google Research for typed, functional array processing in the Haskell/ML family. It explores type systems for array programming, program transformations like differentiation, and compilation to parallel hardware.

## Use cases
- explore type systems for array programming
- differentiate and integrate programs mathematically
- compile numerical code to parallel hardware like GPUs
- interactive incremental numerical programming and visualization
- write functional array-processing prototypes
- run examples like MCMC, ODE integrators, and ray tracers

## When to choose
- you are researching type systems or language design for array programming
- you want a functional language with built-in differentiation for numerical experiments
- you need user-directed compilation to parallel hardware in a research setting

## When to avoid
- you need a production-ready language with ecosystem and tooling support
- you want stable, bug-free numerical computing for real applications
- you prefer mainstream array tools like NumPy or JAX with large communities

## Facets
- artifact type: library
- maturity: experimental
- function: programming-language, compiler, math, gpu-computing, interpreter
- domain: programming-languages, machine-learning, data-science, compilers
- platform: cli
- tags: array-programming, functional-programming, type-systems, automatic-differentiation, research-language, haskell, numerical-computing, parallel-computing, algorithms, linux, macos

## Member repositories
- google-research/dex-lang (main) score 59

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:23.893931+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:37:53.910593+00:00, confidence not recorded.
  - readme: https://github.com/google-research/dex-lang (fetched 2026-08-28T04:05:23.893931+00:00, sha f75350af7382)
- Data as of 2026-08-30T08:39:29.467469+00:00.