[BUG] Multiple image generation caused a media type mismatch error
Resolved 💬 3 comments Opened Dec 4, 2025 by naushera-lang Closed Dec 8, 2025
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?
- Multiple image generation causes a media type mismatch error
- Error persisted across all subsequent messages
- Conversation became unusable and required restart
- At times happened with just one image generation
Current Workaround
- Start a new conversation when this happens
- Generate images in smaller batches to reduce risk
Claude Code becomes unusable
What Should Happen?
Claude should technically be able to read the images that it's written and then either make edits or a user can have input suggestions, etc
Error Messages/Logs
API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.9.content.36.image.source.base64.data: Image does not match the provided media type
image/png"},"request_id":"req_011CVmPtcWzzKuh2Q8dxookS"}
Steps to Reproduce
Not a coder so not sure how to help
Claude Model
Sonnet (default)
Is this a regression?
I don't know
Last Working Version
_No response_
Claude Code Version
v2.0.58
Platform
Anthropic API
Operating System
macOS
Terminal/Shell
Terminal.app (macOS)
Additional Information
_No response_
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