diff --git a/src/cookbook/experiment_assistant_tool_calling.ts b/src/cookbook/experiment_assistant_tool_calling.ts
new file mode 100644
index 0000000..0c0c8fc
--- /dev/null
+++ b/src/cookbook/experiment_assistant_tool_calling.ts
@@ -0,0 +1,94 @@
+import * as dotenv from 'dotenv';
+import OpenAI from 'openai';
+import { trace } from '../utils/trace_utils';
+import { Log } from '../types';
+import { Parea } from '../client';
+
+dotenv.config();
+
+const p = new Parea(process.env.PAREA_API_KEY);
+
+const openai = new OpenAI({
+  apiKey: process.env.OPENAI_API_KEY,
+});
+
+function isCorrectToolCall(log: Log): boolean {
+  return log?.output === log.target;
+}
+
+const toolCall = trace(
+  'toolCall',
+  async (userMessage: string): Promise<string> => {
+    const assistant = await openai.beta.assistants.create({
+      instructions: 'You are a weather bot. Use the provided functions to answer questions.',
+      model: 'gpt-4-turbo-preview',
+      tools: [
+        {
+          type: 'function',
+          function: {
+            name: 'getCurrentWeather',
+            description: 'Get the weather in location',
+            parameters: {
+              type: 'object',
+              properties: {
+                location: { type: 'string', description: 'The city and state e.g. San Francisco, CA' },
+                unit: { type: 'string', enum: ['c', 'f'] },
+              },
+              required: ['location'],
+            },
+          },
+        },
+        {
+          type: 'function',
+          function: {
+            name: 'getNickname',
+            description: 'Get the nickname of a city',
+            parameters: {
+              type: 'object',
+              properties: {
+                location: { type: 'string', description: 'The city and state e.g. San Francisco, CA' },
+              },
+              required: ['location'],
+            },
+          },
+        },
+      ],
+    });
+    const thread = await openai.beta.threads.create({
+      messages: [
+        {
+          role: 'user',
+          content: userMessage,
+        },
+      ],
+    });
+
+    let run = await openai.beta.threads.runs.create(thread.id, {
+      assistant_id: assistant.id,
+    });
+    while (run.status !== 'requires_action') {
+      run = await openai.beta.threads.runs.retrieve(thread.id, run.id);
+      // wait for 1 second before checking the status again
+      await new Promise((resolve) => setTimeout(resolve, 1000));
+    }
+    return run?.required_action?.submit_tool_outputs?.tool_calls?.[0]?.function.name || '';
+  },
+  {
+    evalFuncs: [isCorrectToolCall],
+  },
+);
+
+async function main() {
+  const e = p.experiment(
+    [
+      { userMessage: "What's the weather in San Francisco?", target: 'getCurrentWeather' },
+      { userMessage: "What's the nickname of San Francisco?", target: 'getNickname' },
+    ],
+    toolCall,
+  );
+  return await e.run();
+}
+
+main().then(() => {
+  console.log('Experiment complete!');
+});