diff --git a/src/proxy/middleware/request/add-key.ts b/src/proxy/middleware/request/add-key.ts
index 98edfe9..b58f0d4 100644
--- a/src/proxy/middleware/request/add-key.ts
+++ b/src/proxy/middleware/request/add-key.ts
@@ -1,10 +1,17 @@
 import { Key, keyPool } from "../../../key-management";
-import type { ExpressHttpProxyReqCallback } from ".";
+import { ExpressHttpProxyReqCallback, isCompletionRequest } from ".";
 
 /** Add a key that can service this request to the request object. */
 export const addKey: ExpressHttpProxyReqCallback = (proxyReq, req) => {
   let assignedKey: Key;
 
+  if (!isCompletionRequest(req)) {
+    // Horrible, horrible hack to stop the proxy from complaining about clients
+    // not sending a model when they are requesting the list of models (which
+    // requires a key, but obviously not a model).
+    req.body.model = "gpt-3.5-turbo";
+  }
+
   if (!req.body?.model) {
     throw new Error("You must specify a model with your request.");
   }
diff --git a/src/proxy/middleware/request/transform-outbound-payload.ts b/src/proxy/middleware/request/transform-outbound-payload.ts
index 86caed4..627f762 100644
--- a/src/proxy/middleware/request/transform-outbound-payload.ts
+++ b/src/proxy/middleware/request/transform-outbound-payload.ts
@@ -1,6 +1,6 @@
 import { Request } from "express";
 import { z } from "zod";
-import type { ExpressHttpProxyReqCallback } from ".";
+import { ExpressHttpProxyReqCallback, isCompletionRequest } from ".";
 
 // https://console.anthropic.com/docs/api/reference#-v1-complete
 const AnthropicV1CompleteSchema = z.object({
@@ -42,8 +42,7 @@ export const transformOutboundPayload: ExpressHttpProxyReqCallback = (
   _proxyReq,
   req
 ) => {
-  if (req.retryCount > 0) {
-    // We've already transformed the payload once, so don't do it again.
+  if (req.retryCount > 0 || !isCompletionRequest(req)) {
     return;
   }