[ERROR] Error when the model uses WebFetch in Claude Code (integrated into Claude Desktop)
Status Open
Maintainer reply None cached
Activity 0 comments · opened Aug 7, 2026
Preflight Checklist
- [x] I have searched existing issues and this hasn't been reported yet
- [x] This is a single bug report (please file separate reports for different bugs)
- [x] I am using the latest version of Claude Code
What's Wrong?
When models using webfetch tool, always error
What Should Happen?
The model always encounters errors when using webfetch.
Error Messages/Logs
url: https://example.com
prompt: What is the content of this page? Summarize briefly.
API Error: 400 Invalid value: 'none'. Supported values are: 'concise', 'detailed', and 'auto'.Steps to Reproduce
.
Claude Model
Opus
Is this a regression?
I don't know
Last Working Version
_No response_
Claude Code Version
latest
Platform
Other
Operating System
Windows
Terminal/Shell
PowerShell
Additional Information
<img width="1343" height="275" alt="Image" src="https://github.com/user-attachments/assets/9e1cbd41-0a5c-4850-97dd-30da6c764b8b" />