diff --git a/config.go b/config.go
index 4788ba62a..8bca405bd 100644
--- a/config.go
+++ b/config.go
@@ -70,7 +70,7 @@ func DefaultAzureConfig(apiKey, baseURL string) ClientConfig {
 		APIType:    APITypeAzure,
 		APIVersion: "2023-05-15",
 		AzureModelMapperFunc: func(model string) string {
-			return regexp.MustCompile(`[.:]`).ReplaceAllString(model, "")
+			return regexp.MustCompile(`:`).ReplaceAllString(model, "")
 		},
 
 		HTTPClient: &http.Client{},