Credits

Developer

Apsi is designed and developed by ATEC, its main developer.

How Apsi was built

Apsi is the work of one developer at ATEC, working together with Claude, the AI model made by Anthropic. Development started on 8 November 2026. Everything from the first version to Apsi 2.4.4 — the language, the checker and compilers, the native and GPU code generation, the Python converter, the standard library, the tools, the documentation and this website — took about 25 hours of active work in total. The hours are the time actually spent working, in sessions spread over several days, not the time on the clock.

This figure is final. It counts the first build of the project, from an empty folder to a finished Apsi 2.4.4, and it will not be updated: 2.4.4 completes that first stage, and later versions are new work.

• Official source code: https://apsi.dev/download
• Official website: https://apsi.dev

Apsi is distributed under the Apsi License 2.0. Anyone who shares Apsi or a work based on it must credit ATEC with the address above.

Community

Thank you to everyone who reports problems, writes libraries, answers questions and shares their work in the community.

Open-source software used

Apsi and this website build on excellent open-source projects. Their licences apply to those components.