docs: add thinking examples

Author: RobertCraigie

examples/thinking-stream.ts

@@ -0,0 +1,35 @@
+import Anthropic from '@anthropic-ai/sdk';
+
+const client = new Anthropic(); // gets API Key from environment variable ANTHROPIC_API_KEY
+
+async function main() {
+  let thinkingState = 'not-started';
+
+  const stream = client.messages
+    .stream({
+      model: 'claude-3-7-sonnet-20250219',
+      max_tokens: 3200,
+      thinking: { type: 'enabled', budget_tokens: 1600 },
+      messages: [{ role: 'user', content: 'Create a haiku about Anthropic.' }],
+    })
+    .on('thinking', (thinking) => {
+      if (thinkingState === 'not-started') {
+        console.log('Thinking:\n---------');
+        thinkingState = 'started';
+      }
+
+      process.stdout.write(thinking);
+    })
+    .on('text', (text) => {
+      if (thinkingState !== 'finished') {
+        console.log('\n\nText:\n-----');
+        thinkingState = 'finished';
+      }
+      process.stdout.write(text);
+    });
+
+  const finalMessage = await stream.finalMessage();
+  console.log('\n\nFinal message object:\n--------------------', finalMessage);
+}
+
+main();

examples/thinking.ts

@@ -0,0 +1,22 @@
+import Anthropic from '@anthropic-ai/sdk';
+
+const client = new Anthropic();
+
+async function main() {
+  const message = await client.messages.create({
+    model: 'claude-3-7-sonnet-20250219',
+    max_tokens: 3200,
+    thinking: { type: 'enabled', budget_tokens: 1600 },
+    messages: [{ role: 'user', content: 'Create a haiku about Anthropic.' }],
+  });
+
+  for (const block of message.content) {
+    if (block.type === 'thinking') {
+      console.log(`Thinking: ${block.thinking}`);
+    } else if (block.type === 'text') {
+      console.log(`Text: ${block.text}`);
+    }
+  }
+}
+
+main();