diff --git a/app/routes/api.chat.ts b/app/routes/api.chat.ts
index b685ac8..0a41c2c 100644
--- a/app/routes/api.chat.ts
+++ b/app/routes/api.chat.ts
@@ -34,13 +34,19 @@ async function chatAction({ context, request }: ActionFunctionArgs) {
 
         const result = await streamText(messages, context.cloudflare.env, options);
 
-        return stream.switchSource(result.toAIStream());
+        return (
+          /* WARNING: toAIStream has been removed from streamText.
+           See migration guide at https://sdk.vercel.ai/docs/migrations */
+          stream.switchSource(result.toDataStream())
+        );
       },
     };
 
     const result = await streamText(messages, context.cloudflare.env, options);
 
-    stream.switchSource(result.toAIStream());
+    /* WARNING: toAIStream has been removed from streamText.
+     See migration guide at https://sdk.vercel.ai/docs/migrations */
+    stream.switchSource(result.toDataStream());
 
     return new Response(stream.readable, {
       status: 200,
diff --git a/app/routes/api.enhancer.ts b/app/routes/api.enhancer.ts
index 5c8175c..6365cd1 100644
--- a/app/routes/api.enhancer.ts
+++ b/app/routes/api.enhancer.ts
@@ -1,5 +1,5 @@
 import { type ActionFunctionArgs } from '@remix-run/cloudflare';
-import { StreamingTextResponse, parseStreamPart } from 'ai';
+import { parseDataStreamPart } from 'ai';
 import { streamText } from '~/lib/.server/llm/stream-text';
 import { stripIndents } from '~/utils/stripIndent';
 
@@ -38,7 +38,7 @@ async function enhancerAction({ context, request }: ActionFunctionArgs) {
           .decode(chunk)
           .split('\n')
           .filter((line) => line !== '')
-          .map(parseStreamPart)
+          .map(parseDataStreamPart)
           .map((part) => part.value)
           .join('');
 
@@ -46,9 +46,11 @@ async function enhancerAction({ context, request }: ActionFunctionArgs) {
       },
     });
 
-    const transformedStream = result.toAIStream().pipeThrough(transformStream);
+    const transformedStream = /* WARNING: toAIStream has been removed from streamText.
+     See migration guide at https://sdk.vercel.ai/docs/migrations */
+    result.toDataStream().pipeThrough(transformStream);
 
-    return new StreamingTextResponse(transformedStream);
+    return result.toDataStreamResponse();
   } catch (error) {
     console.log(error);
 
diff --git a/package.json b/package.json
index 35e3d5f..6775f14 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "node": ">=22.14.0"
   },
   "dependencies": {
-    "@ai-sdk/anthropic": "^0.0.39",
+    "@ai-sdk/anthropic": "^1.2.12",
     "@codemirror/autocomplete": "^6.18.6",
     "@codemirror/commands": "^6.8.1",
     "@codemirror/lang-cpp": "^6.0.3",
@@ -54,7 +54,7 @@
     "@xterm/addon-fit": "^0.10.0",
     "@xterm/addon-web-links": "^0.11.0",
     "@xterm/xterm": "^5.5.0",
-    "ai": "^3.3.4",
+    "ai": "^4.3.16",
     "date-fns": "^3.6.0",
     "diff": "^5.2.0",
     "framer-motion": "^11.2.12",
@@ -87,6 +87,7 @@
     "is-ci": "^3.0.1",
     "node-fetch": "^3.3.2",
     "prettier": "^3.3.2",
+    "sass-embedded": "^1.89.2",
     "typescript": "^5.5.2",
     "unified": "^11.0.5",
     "unocss": "^0.61.3",