OpenCode 1.18.26

Released Sep 01, 2026 · official source

Safe to upgrade? Looks safe

0 bug/regression-labelled issues opened in the 24h after release (0 regression-flagged, 0 mention v1.18.26 in title). Normalised score 0.0.

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Breaking-change highlights

`apply_patch` no longer emits an empty move path in permission metadata. (@altendky)

Auto-extracted lines mentioning breaking/deprecated/removed/migrate. Always read the full notes.

Changelog: v1.18.26

Core

Bugfixes

Claude 5 sessions now tolerate stale thinking blocks instead of failing after prompt or tool changes.
Bedrock GPT-5.6 models now accept none reasoning effort.
Bedrock reasoning and replay handling is more reliable. (@pengzh1)
Tool call timing now stays accurate when tools update their metadata while still running. (@bartlettroscoe)
apply_patch no longer emits an empty move path in permission metadata. (@altendky)

Improvements

Azure CLI sign-in now asks for the resource name directly instead of querying Azure management APIs.

Desktop

Bugfixes

Session renames now save reliably from the title editor and tab context menu.

Thank you to 3 community contributors:

@altendky:
fix(opencode): omit empty apply patch move path (#45329)
@pengzh1:
fix(core): bump @ai-sdk/amazon-bedrock to 4.0.166 for reasoning and replay fixes (#45520)
@bartlettroscoe:
fix(core): Fix for incorrect time.start reset in tool call logging (#32574) (#32596)