Add Claude class for Anthropic API integration with message generation

app.py

@@ -63,7 +63,18 @@ def check_format(answer: str | list, *args, **kwargs) -> list:
     elif isinstance(answer, dict):
         raise TypeError(f"Final answer must be a list, not a dict. Please check the answer format.")
     
+class Claude:
+    def __init__(self):
+        self.client = anthropic.Anthropic(api_key=os.environ.get("ANTHROPIC_API_KEY"))
 
+    def generate(self, prompt: str):
+        message = self.client.messages.create(
+            model="claude-sonnet-4-20250514",
+            max_tokens=20000,
+            temperature=1,
+            messages=[{"role": "user", "content": prompt}]
+            )
+        return message.content
 ## tools definition
 @tool
 def download_images(image_urls: str) -> list: