OpenCode v1.18.18 Changelog
What changed in OpenCode CLI v1.18.18, released 2026-08-13 — explained in plain English.
- Fixed a glitch where the Kimi AI was getting the wrong set of background instructions.
- Repaired a setting that controls how hard certain xAI models think.
- This is a small but important update to make sure your AI tools run exactly as intended.
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This release is a quick maintenance update focused on making sure your AI models behave correctly. It matters most to anyone using Kimi or xAI models through OpenCode, ensuring these specific tools get the right instructions and think at the correct intensity.
Fixes
- Kimi system prompt mix-up: A "system prompt" is the hidden set of rules an AI follows. OpenCode was accidentally sending the wrong instructions when you used the official Moonshot or Kimi providers. This is fixed, so those AIs will now understand your requests correctly.
- xAI thinking effort: Some xAI models have a setting called "xhigh" that tells the AI to think really hard about complex problems. This setting was broken, but it's now fixed so the AI will put in the expected amount of brainpower.
Breaking changes
No breaking changes in this release.
How to upgrade
Update to OpenCode v1.18.18 by running:
npm install -g opencode-aiThis is our plain-language summary. Read the complete, official notes on the OpenCode official changelog ↗.
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