diff --git a/plugins/wasm-go/extensions/ai-proxy/provider/openai.go b/plugins/wasm-go/extensions/ai-proxy/provider/openai.go
index af53bb6ed..0a170347f 100644
--- a/plugins/wasm-go/extensions/ai-proxy/provider/openai.go
+++ b/plugins/wasm-go/extensions/ai-proxy/provider/openai.go
@@ -66,7 +66,7 @@ func (m *openaiProviderInitializer) CreateProvider(config ProviderConfig) (Provi
 	capabilities := m.DefaultCapabilities()
 	if !isDirectCustomPath {
 		for key, mapPath := range capabilities {
-			capabilities[key] = path.Join(customPath, mapPath)
+			capabilities[key] = path.Join(customPath, strings.TrimPrefix(mapPath, "/v1"))
 		}
 	}
 	config.setDefaultCapabilities(capabilities)