OpenCode 1.18.18

Released Aug 13, 2026 · official source

Safe to upgrade? Looks safe

0 bug/regression-labelled issues opened in the 72h after release (0 regression-flagged, 0 mention v1.18.18 in title). Normalised score 0.0.

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Changelog: v1.18.18

Core

Bugfixes

Select the Kimi system prompt correctly for official Moonshot and Kimi providers
Fix xhigh reasoning effort for xai models