Kimi K2.5 Free OpenCode Zen throws an error #8208

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opened 2026-02-16 18:09:26 -05:00 by yindo · 2 comments
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Originally created by @vladbesson on GitHub (Feb 1, 2026).

Originally assigned to: @fwang on GitHub.

Description

An error message keeps popping up when attempting to use the Kimi K2.5 Free OpenCode Zen model:

JSON Schema not supported: could not understand the instance `{'description': 'Value to set. Must match field type from schema. For references: {_type: "reference", _ref: "id"}. For blocks: include _type.'}`.

Plugins

No response

OpenCode version

1.1.48

Steps to reproduce

  1. run opencode
  2. choose Kimi K2.5 Free OpenCode Zen
  3. choose Plan mode
  4. ask single question
Image

Screenshot and/or share link

No response

Operating System

macOS 26.2

Terminal

kitty

Originally created by @vladbesson on GitHub (Feb 1, 2026). Originally assigned to: @fwang on GitHub. ### Description An error message keeps popping up when attempting to use the Kimi K2.5 Free OpenCode Zen model: ``` JSON Schema not supported: could not understand the instance `{'description': 'Value to set. Must match field type from schema. For references: {_type: "reference", _ref: "id"}. For blocks: include _type.'}`. ``` ### Plugins _No response_ ### OpenCode version 1.1.48 ### Steps to reproduce 1. run opencode 2. choose Kimi K2.5 Free OpenCode Zen 3. choose Plan mode 4. ask single question <img width="1302" height="906" alt="Image" src="https://github.com/user-attachments/assets/736ea0bb-f867-4fe7-b8b2-835fdfca2400" /> ### Screenshot and/or share link _No response_ ### Operating System macOS 26.2 ### Terminal kitty
yindo added the bugzen labels 2026-02-16 18:09:26 -05:00
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@github-actions[bot] commented on GitHub (Feb 1, 2026):

This issue might be a duplicate of existing issues. Please check:

  • #11446: New Kimi 2.5 model is giving error "Extra inputs are not permitted, field: 'reasoning_content', value: []"
  • #11550: Read tool for kimi k2.5 on zen dose not work on images

Feel free to ignore if none of these address your specific case.

@github-actions[bot] commented on GitHub (Feb 1, 2026): This issue might be a duplicate of existing issues. Please check: - #11446: New Kimi 2.5 model is giving error "Extra inputs are not permitted, field: 'reasoning_content', value: []" - #11550: Read tool for kimi k2.5 on zen dose not work on images Feel free to ignore if none of these address your specific case.
Author
Owner

@pjosdev commented on GitHub (Feb 1, 2026):

Same issue when the provider is OpenRouter.

EDIT: I disabled Sanity CMS MCP and issue is gone.

@pjosdev commented on GitHub (Feb 1, 2026): Same issue when the provider is OpenRouter. EDIT: I disabled Sanity CMS MCP and issue is gone.
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Reference: anomalyco/opencode#8208