diff --git a/gateway/examples/openai-multi-provider-proxy.yaml b/gateway/examples/openai-multi-provider-proxy.yaml
index e88f18901..2d24fc6b5 100644
--- a/gateway/examples/openai-multi-provider-proxy.yaml
+++ b/gateway/examples/openai-multi-provider-proxy.yaml
@@ -20,9 +20,9 @@
 #
 #   * Multi-provider mode    — put openai-header-router first. It writes
 #     the chosen provider into metadata["selected_provider"]. Each
-#     translator then runs only when that selection equals its own "id".
-#     The "id" doubles as the upstream cluster name, so it must match an
-#     entry in additionalProviders (id or as).
+#     translator then runs only when that selection equals its own
+#     "provider-id". The "provider-id" doubles as the upstream cluster
+#     name, so it must match an entry in additionalProviders (id or as).
 #
 # --------------------------------------------------------------------
 
diff --git a/gateway/gateway-controller/pkg/utils/llm_transformer.go b/gateway/gateway-controller/pkg/utils/llm_transformer.go
index 131d1d39d..4432b0bb9 100644
--- a/gateway/gateway-controller/pkg/utils/llm_transformer.go
+++ b/gateway/gateway-controller/pkg/utils/llm_transformer.go
@@ -798,9 +798,9 @@ func (t *LLMProviderTransformer) proxyUpstreamAuthPolicy(auth *api.LLMUpstreamAu
 }
 
 // proxyTransformerPolicy builds a translator policy for an additional provider's
-// inline transformer. The provider's upstream name is passed to the translator as
-// its "id" param so it targets the correct upstream, and gates execution so the
-// translator runs only when this provider is the selected upstream.
+// inline transformer. The provider's upstream name is passed to the translator
+// as its "provider-id" param so it targets the correct upstream, and gates
+// execution so the translator runs only when this provider is selected.
 func (t *LLMProviderTransformer) proxyTransformerPolicy(transformer *api.LLMProxyTransformer, name, field string) (*api.Policy, error) {
 	if transformer == nil {
 		return nil, nil
@@ -818,7 +818,7 @@ func (t *LLMProviderTransformer) proxyTransformerPolicy(transformer *api.LLMProx
 			params[k] = v
 		}
 	}
-	params["id"] = name
+	params["provider-id"] = name
 
 	condition := selectedProviderExecutionCondition(name, false)
 	return &api.Policy{
diff --git a/gateway/gateway-controller/pkg/utils/llm_transformer_multiprovider_test.go b/gateway/gateway-controller/pkg/utils/llm_transformer_multiprovider_test.go
index 9d558dfaf..1c8bc277a 100644
--- a/gateway/gateway-controller/pkg/utils/llm_transformer_multiprovider_test.go
+++ b/gateway/gateway-controller/pkg/utils/llm_transformer_multiprovider_test.go
@@ -238,7 +238,7 @@ func TestLLMProviderTransformer_TransformProxy_AdditionalProviderTransformerIsCo
 	require.NotNil(t, transformerPolicy.ExecutionCondition)
 	assert.Contains(t, *transformerPolicy.ExecutionCondition, "anthropic-provider")
 	require.NotNil(t, transformerPolicy.Params)
-	assert.Equal(t, "anthropic-provider", (*transformerPolicy.Params)["id"])
+	assert.Equal(t, "anthropic-provider", (*transformerPolicy.Params)["provider-id"])
 	assert.Equal(t, "claude-sonnet-4-5-20250929", (*transformerPolicy.Params)["model"])
 }