Model Request Error when using Claude Sonnet 4.5 in Rovo Dev Agent

Hi, I’d like to report an issue I encountered when using Claude Sonnet 4.5 (Preview) in the Rovo Dev Agent.

Whenever I run a simple command like test, I get this error:

”Model Request Error
Failed to generate an LLM response.”

What’s strange is that I still have around 700 monthly credits available, and other models work perfectly fine. The issue happens only with Claude Sonnet 4.5.

Screenshot attached.
Is this a model restriction or an internal bug? Thanks!

Summary

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