Paid for Sonnet 4.6 but Response Quality Has Dropped Significantly — Starting to Suspect It's Actual

[kui niu]

I'm a paying RovoDev customer with valid billing on file, and I'd like to raise a serious concern.

I've been using the Claude Sonnet 4.6 tier, but the responses I'm getting feel noticeably weaker in reasoning, depth, and overall quality — more consistent with Claude Haiku 4.5 than Sonnet 4.6. I strongly suspect I'm not being served the model I'm paying for.

This is a significant issue. I'm paying a premium for Sonnet 4.6 and expect to receive exactly that. If the correct model is not being delivered as advertised, I'd like to request a full refund.

[kui niu]

I noticed this issue started after I upgraded to version 0.13.57. Has anyone else experienced the same problem after updating to this version?