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mimo-v2.5 (opencode-go) tool calls fail with "upstream response contained invalid tool calls #43185
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Description
Description
When the model is switched to opencode-go/mimo-v2.5 (also reproducible with opencode-go/mimo-v2.5-pro), any
prompt that requires tool calling fails almost immediately with:
stream disconnected before completion: upstream response contained invalid tool calls
Plugins
No response
OpenCode version
2.14.0
Steps to reproduce
- Point Codex at the opencodex gateway (http://127.0.0.1:10100/v1).
- Select opencode-go/mimo-v2.5 (e.g. via /model).
- Ask it to do anything that requires a tool call (run a command, edit a file, use apply_patch, etc.).
- Observe the stream disconnects with the error above.
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Operating System
Windows11
Terminal
Windows PowerShell
Reacted by altgans
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github-actions commentedon Aug 18, 2026
This issue might be a duplicate of existing issues. Please check:
If your issue is the same root cause, consider adding a comment there instead.
zarahao commentedon Aug 21, 2026
这个PR可能解决这个400错误：#32966
github-actions commentedon Oct 21, 2026
To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.