# NumPy 2.x incompatible with modules compiled for NumPy 1.x — Software interface version compatibility

For NumPy 2.x incompatible with modules compiled for NumPy 1.x, product is NumPy; software version is 2.0; dependency version is modules compiled with NumPy 1.x, recorded from its source on 2026-08-04.

- **Product:** NumPy
- **Version pairing:** NumPy 2.x incompatible with modules compiled for NumPy 1.x _(unconfirmed — we could not tie this to the quote below)_
- **Software version:** 2.0 _(unconfirmed — we could not tie this to the quote below)_
- **Dependency version:** modules compiled with NumPy 1.x _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> A module that was compiled using NumPy 1. x cannot be run in

## Source

- https://numpy.org/doc/stable/user/troubleshooting-importerror.html

Last verified: 2026-08-04. Review by: 2026-10-03.
Part of [Software interface version compatibility](https://referencesource.org/software-interface-version-compatibility/).