Choupo-2608 — current stable release
Released 2 September 2026 · tag v2608
Four solver binaries (steady, batch, dynamic + control, properties), 50 unit-operation models, a curated thermodynamic catalogue (603 components, 205 Henry pairs, Pitzer and electrolyte-NRTL sets), 393 runnable tutorials, and the three-level conservation discipline — mass, per-element atoms and energy — with the element balance emitted by default on every converged steady run. Runs natively (C++17, zero dependencies) and in the browser via WebAssembly.
Development line — Choupo-dev
The continuously-updated latest · no pinned target version · branch main
The app at choupo.org/app
runs this line by default — a browser app has no install, so
visitors get the newest Choupo, clearly badged
Choupo-dev · <commit> in the top bar. No stability
promises: cases, results and interfaces may shift between commits;
cite and teach from the tagged stable release above.
Cite Choupo
Make the exact software version part of the scientific record.
A moving branch is not a citable object — cite the versioned release you actually used:
Geraldes, V. (2026). Choupo — Open-source Chemical Process Simulator (version 2608) [Computer software]. https://www.choupo.org/
Release history
- Choupo-2608 — released 2 September 2026. The August line: verification as the product's spine, batch membranes, a structured MESH Newton, ice as a phase, and every EduTool symbol glossed against the engine. Announcement & notes