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[FEATURE]: Add disable_reasoning parameter for GLM/Cerebras thinking toggle #8442

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opened 2026-02-16 18:09:59 -05:00 by yindo · 1 comment
yindo commented 2026-02-16 18:09:59 -05:00
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Originally created by @iamadamreed on GitHub (Feb 3, 2026).

Originally assigned to: @thdxr on GitHub.

Problem

GLM-4.5/4.6/4.7 and Cerebras models support disable_reasoning boolean parameter to control thinking/reasoning output. Currently no way to configure this in OpenCode agent settings.

  • Issue #3259 asked "How to disable thinking in GLM-4.6?" but closed without implementation
  • Useful for reducing tokens, faster responses, avoiding parsing bugs (#6486, #7779, #6708)

Proposed Solution

Add disable_reasoning as optional boolean in agent configuration:

{
  "agent": {
    "fast-build": {
      "model": "cerebras/zai-glm-4.7",
      "disable_reasoning": true
    }
  }
}

Benefits

  • Reduce token usage/costs for simple tasks
  • Faster responses when deep reasoning not needed
  • Avoids reasoning tag parsing issues
  • User control over thinking verbosity

Implementation Notes

  • Apply to GLM and Cerebras providers
  • Default: false (thinking enabled)
  • Parameter name matches GLM/Cerebras API spec
Originally created by @iamadamreed on GitHub (Feb 3, 2026). Originally assigned to: @thdxr on GitHub. ### Problem GLM-4.5/4.6/4.7 and Cerebras models support `disable_reasoning` boolean parameter to control thinking/reasoning output. Currently no way to configure this in OpenCode agent settings. - Issue #3259 asked "How to disable thinking in GLM-4.6?" but closed without implementation - Useful for reducing tokens, faster responses, avoiding parsing bugs (#6486, #7779, #6708) ### Proposed Solution Add `disable_reasoning` as optional boolean in agent configuration: ```json { "agent": { "fast-build": { "model": "cerebras/zai-glm-4.7", "disable_reasoning": true } } } ``` ### Benefits - Reduce token usage/costs for simple tasks - Faster responses when deep reasoning not needed - Avoids reasoning tag parsing issues - User control over thinking verbosity ### Implementation Notes - Apply to GLM and Cerebras providers - Default: `false` (thinking enabled) - Parameter name matches GLM/Cerebras API spec
yindo commented 2026-02-16 18:09:59 -05:00
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@github-actions[bot] commented on GitHub (Feb 3, 2026):

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

  • #3259: How to disable thinking in GLM-4.6? (closed request asking for the same feature)
  • #10320: Specify sub-agent variant (thinking lvl) from script for token economy (related request for thinking level control)

Feel free to ignore if these don't address your specific case.

@github-actions[bot] commented on GitHub (Feb 3, 2026): This issue might be a duplicate of existing issues. Please check: - #3259: How to disable thinking in GLM-4.6? (closed request asking for the same feature) - #10320: Specify sub-agent variant (thinking lvl) from script for token economy (related request for thinking level control) Feel free to ignore if these don't address your specific case.
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Reference: anomalyco/opencode#8442
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