Github Copilot Opus 4.1 #2532

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opened 2026-02-16 17:36:07 -05:00 by yindo · 7 comments
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Originally created by @mgstate on GitHub (Nov 3, 2025).

Originally assigned to: @rekram1-node on GitHub.

Description

gh copilot opus 4.1 even on build mode does not write to disk i tried all the different config changes i could make and nothing. gh copilot Sonnet 4.5 works fine.

OpenCode version

0.15.31

Steps to reproduce

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Originally created by @mgstate on GitHub (Nov 3, 2025). Originally assigned to: @rekram1-node on GitHub. ### Description gh copilot opus 4.1 even on build mode does not write to disk i tried all the different config changes i could make and nothing. gh copilot Sonnet 4.5 works fine. ### OpenCode version 0.15.31 ### Steps to reproduce _No response_ ### Screenshot and/or share link _No response_ ### Operating System _No response_ ### Terminal _No response_
yindo added the bug label 2026-02-16 17:36:07 -05:00
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@github-actions[bot] commented on GitHub (Nov 3, 2025):

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

  • #2022: Similar issue where build mode has no effect on files/doesn't edit files
  • #1391: Bug report about build mode tools not being available properly
  • #1803: AWS Bedrock Anthropic Opus 4.1 having issues with the write tool and JSON parsing failures

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

@github-actions[bot] commented on GitHub (Nov 3, 2025): This issue might be a duplicate of existing issues. Please check: - #2022: Similar issue where build mode has no effect on files/doesn't edit files - #1391: Bug report about build mode tools not being available properly - #1803: AWS Bedrock Anthropic Opus 4.1 having issues with the write tool and JSON parsing failures Feel free to ignore if none of these address your specific case.
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@rekram1-node commented on GitHub (Nov 3, 2025):

@mgstate wdym by:

gh copilot opus 4.1 even on build mode does not write to disk

@rekram1-node commented on GitHub (Nov 3, 2025): @mgstate wdym by: > gh copilot opus 4.1 even on build mode does not write to disk
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@mgstate commented on GitHub (Nov 3, 2025):

@rekram1-node it never writes to disk oddly thinks it does i only have this problem with gh opus 4.1

Image

so above is 4.5 created file its there perfectly fine below is gh opus 4.1 says done and did it but does nothing actually

Image Image
@mgstate commented on GitHub (Nov 3, 2025): @rekram1-node it never writes to disk oddly thinks it does i only have this problem with gh opus 4.1 <img width="977" height="120" alt="Image" src="https://github.com/user-attachments/assets/a67e57e0-a3f5-4575-a211-bb1cddf06daf" /> so above is 4.5 created file its there perfectly fine below is gh opus 4.1 says done and did it but does nothing actually <img width="1138" height="552" alt="Image" src="https://github.com/user-attachments/assets/17b0d66a-ae90-49c2-9427-139d1c652c36" /> <img width="896" height="105" alt="Image" src="https://github.com/user-attachments/assets/de0a8780-d49c-4c5a-a46f-1286ffbd7e58" />
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@chen-coalition commented on GitHub (Nov 3, 2025):

Having the same issue

@chen-coalition commented on GitHub (Nov 3, 2025): Having the same issue
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@rekram1-node commented on GitHub (Nov 3, 2025):

huh that's weird is it actually calling tools? or just saying it is.

@rekram1-node commented on GitHub (Nov 3, 2025): huh that's weird is it actually calling tools? or just saying it is.
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@mgstate commented on GitHub (Nov 3, 2025):

Just saying it is its super weird, one time i got it to work was i told claude to prompt opencode and it did the action that way but any direct interaction i have or try with it, it just completely hallucinates and says its doing stuff and does nothing... Like i said its only a issues with gh opus 4.1

@mgstate commented on GitHub (Nov 3, 2025): Just saying it is its super weird, one time i got it to work was i told claude to prompt opencode and it did the action that way but any direct interaction i have or try with it, it just completely hallucinates and says its doing stuff and does nothing... Like i said its only a issues with gh opus 4.1
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@chen-coalition commented on GitHub (Nov 3, 2025):

^ Exact same behavior I'm getting

@chen-coalition commented on GitHub (Nov 3, 2025): ^ Exact same behavior I'm getting
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Reference: anomalyco/opencode#2532