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claude-code - 💡(How to fix) Fix [BUG] Log shows yukonSilver not supported (status=unsupported) [1 participants]

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anthropics/claude-code#54506•Fetched 2026-04-30 06:43:47
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Error Message

Error Messages/Logs

Code Example

Windows 11 Enterprise 23H2 (Build 22631.6783)
Claude Desktop 1.5220.0 (MSIX)
Log shows yukonSilver not supported (status=unsupported)
RAW_BUFFERClick to expand / collapse

Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

Windows 11 Enterprise 23H2 (Build 22631.6783) Claude Desktop 1.5220.0 (MSIX) Log shows yukonSilver not supported (status=unsupported)

What Should Happen?

Windows 11 Enterprise 23H2 (Build 22631.6783) Claude Desktop 1.5220.0 (MSIX) Log shows yukonSilver not supported (status=unsupported)

Error Messages/Logs

Windows 11 Enterprise 23H2 (Build 22631.6783)
Claude Desktop 1.5220.0 (MSIX)
Log shows yukonSilver not supported (status=unsupported)

Steps to Reproduce

Windows 11 Enterprise 23H2 (Build 22631.6783) Claude Desktop 1.5220.0 (MSIX) Log shows yukonSilver not supported (status=unsupported)

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

1.5220.0 (082bd4)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

No response

extent analysis

TL;DR

The issue is likely due to the yukonSilver model not being supported in the current version of Claude Code, and a potential fix could be to use a different model or wait for an update that supports this model.

Guidance

  • Verify that the yukonSilver model is indeed not supported by checking the official documentation or release notes of Claude Code.
  • Check if there are any alternative models available that can be used as a workaround.
  • If this is a regression, try to find the last working version of Claude Code that supported the yukonSilver model to identify the potential cause of the issue.
  • Reach out to the developers or support team of Claude Code to report the issue and ask for an estimated time for a fix or an alternative solution.

Notes

The issue lacks information about the last working version of Claude Code, which could be helpful in identifying the cause of the regression. Additionally, there is no information about potential workarounds or alternative models that could be used.

Recommendation

Apply workaround: Since the yukonSilver model is not supported in the current version, using an alternative model or waiting for an update that supports this model might be the best course of action.

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claude-code - 💡(How to fix) Fix [BUG] Log shows yukonSilver not supported (status=unsupported) [1 participants]