OpenCode v1.18.26

OpenCode v1.18.26 was released on .

Summary

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...

Release Context

  • This was the 187th OpenCode release of 2026 tracked by Havoptic.
  • It shipped 5 days after OpenCode v1.18.25 (August 28, 2026).

Shipped around the same time

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Release Notes

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) - applypatch 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)

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