diff --git a/packages/proxy/schema/secrets.ts b/packages/proxy/schema/secrets.ts
index 2056ff2a..923bceff 100644
--- a/packages/proxy/schema/secrets.ts
+++ b/packages/proxy/schema/secrets.ts
@@ -8,8 +8,8 @@ export const BaseMetadataSchema = z
     excludeDefaultModels: z.boolean().nullish(),
     additionalHeaders: z.record(z.string(), z.string()).nullish(),
     supportsStreaming: z.boolean().default(true),
-    custom_model: z.string().nullish(),
-    custom_system_prompt: z.string().nullish(),
+    overrideModel: z.string().nullish(),
+    overrideSystemPrompt: z.string().nullish(),
   })
   .strict();
 
diff --git a/packages/proxy/src/proxy.ts b/packages/proxy/src/proxy.ts
index 65dbfbb2..a80645e3 100644
--- a/packages/proxy/src/proxy.ts
+++ b/packages/proxy/src/proxy.ts
@@ -1182,12 +1182,12 @@ async function fetchModelLoop(
   const secrets = await getApiSecrets(model);
 
   const customModelOverride =
-    secrets.length > 0 && secrets[0].metadata?.custom_model
-      ? String(secrets[0].metadata.custom_model)
+    secrets.length > 0 && secrets[0].metadata?.overrideModel
+      ? String(secrets[0].metadata.overrideModel)
       : null;
   const customSystemPromptContent =
-    secrets.length > 0 && secrets[0].metadata?.custom_system_prompt
-      ? String(secrets[0].metadata.custom_system_prompt)
+    secrets.length > 0 && secrets[0].metadata?.overrideSystemPrompt
+      ? String(secrets[0].metadata.overrideSystemPrompt)
       : null;
 
   if (customModelOverride) {