The Project 1234 family split into Soviet and export branches, then into later refits with different missiles and gun fits.
| Variant | Key fit | Notes |
|---|
| Project 1234 / Nanuchka I | P-120 Malakhit anti-ship missiles | Baseline Soviet service variant with the original missile-heavy coastal strike layout. |
| Project 1234E / Nanuchka II | P-15 Termit export fit | Export derivative built for customers including Libya, India, and Algeria. |
| Project 12341 / Nanuchka III | Kh-35 / Uran modernization and stronger point defense | Later Russian refits added updated missiles and improved gun and fire-control equipment. |