OpenCode 1.18.21

Released Aug 21, 2026 · official source

Safe to upgrade? Looks safe

6 bug/regression-labelled issues opened in the 72h after release (0 regression-flagged, 0 mention v1.18.21 in title). Normalised score 6.0.

Issues counted

#44163 Mobile safe areas are too large (bug)
#44162 Improve WebSocket reconnection reliability (bug)
#44161 Web UI session scroll intermittently stops following the bottom (bug)
#44160 Desktop deep link to create a session does not work (bug)
#44159 Server editor dialog can trap focus outside the dialog (bug)
#44158 Changing the server on / suspends the entire layout (bug)

How this is computed

Changelog: v1.18.21

Core

Bugfixes

Continue responses when a model reports an unknown finish reason instead of stopping early
Route Vertex AI eu and us multi-region Gemini requests through REP endpoints

Desktop

Bugfixes

Keep file search results visible while the next search is loading
Register the archive session command in both desktop layouts (@NathanTCode)

Thank you to 1 community contributor:

@NathanTCode:
fix(app): register archive session command in both layouts (#41741)