OpenCode v1.18.18

OpenCode v1.18.18 was released on .

Summary

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

Release Context

  • This was the 179th OpenCode release of 2026 tracked by Havoptic.
  • It shipped the same day as OpenCode v1.18.17 (August 12, 2026).

Shipped around the same time

Within 3 days of this release, other AI coding tools also shipped:

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Release Notes

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

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