Unexpected line breaks in the thinking output of GLM-5 via OpenCode Zen

[sghng]

Description

When using GLM-5 via OpenCode Zen, the thinking output includes unexpected line breaks:

Other models in OpenCode Zen are normal.

Might be related to #16903

Plugins

No response

OpenCode version

1.3.10

Steps to reproduce

No response

Screenshot and/or share link

No response

Operating System

macOS 26.4

Terminal

Ghostty

[github-actions]

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

• The opencode under WSL outputs only one word per line during thinking. #20234: Similar symptom of unexpected line breaks/one word per line in thinking output (different environment - WSL, but same visual behavior)
• [BUG] GLM-5 model pollutes context window with broken thinking output #16903: GLM-5 model polluting context window with broken thinking output (already referenced in your report)

If your issue is distinct from these, please clarify how it differs.