yanzhi

experiencing similar issue too, here is the log ``` {"message":"400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.1.content.0: Invalid `signature` in `thinking` block\"},\"request_id\":\"req_vrtx_011CVMkoUR3ukzE5uNm6Nuip\"}","status":400,"request_id":"req_vrtx_011CVMkoUR3ukzE5uNm6Nuip","modelId":"claude-sonnet-4-5@20250929","providerId":"vertex","details":{"type":"error","error":{"type":"invalid_request_error","message":"messages.1.content.0: Invalid `signature` in `thinking` block"},"request_id":"req_vrtx_011CVMkoUR3ukzE5uNm6Nuip"}} Request ID: req_vrtx_011CVMkoUR3ukzE5uNm6Nuip ```