diff --git a/.env.example b/.env.example
index f3ce08d..48f1c26 100644
--- a/.env.example
+++ b/.env.example
@@ -12,6 +12,9 @@ LLM_PROVIDER=openai # default
 # or
 # LLM_PROVIDER=google
 # GOOGLE_API_KEY=your-google-api-key
+# or
+# LLM_PROVIDER=anthropic
+# ANTHROPIC_API_KEY=your-anthropic-api-key
 
 # uncomment and unset these environment variables to connect to the local dev server
 # TEMPORAL_ADDRESS=namespace.acct.tmprl.cloud:7233
diff --git a/README.md b/README.md
index faf0a98..04821d3 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,7 @@ The agent can use either OpenAI's GPT-4o, Google Gemini, or a local LLM via Olla
 
 - `LLM_PROVIDER=openai` for OpenAI's GPT-4o
 - `LLM_PROVIDER=google` for Google Gemini
+- `LLM_PROVIDER=anthropic` for Anthropic
 - `LLM_PROVIDER=ollama` for the local LLM via Ollama (not recommended for this use case)
 
 ### Option 1: OpenAI Configuration
@@ -33,7 +34,14 @@ To use Google Gemini:
 1. Obtain a Google API key and set it in the `GOOGLE_API_KEY` environment variable in `.env`.
 2. Set `LLM_PROVIDER=google` in your `.env` file.
 
-### Option 3: Local LLM via Ollama (not recommended)
+### Option 3: Anthropic
+
+To use Anthropic:
+
+1. Obtain an Anthropic API key and set it in the `ANTHROPIC_API_KEY` environment variable in `.env`.
+2. Set `LLM_PROVIDER=anthropic` in your `.env` file.
+
+### Option 4: Local LLM via Ollama (not recommended)
 
 To use a local LLM with Ollama:
 
diff --git a/activities/tool_activities.py b/activities/tool_activities.py
index 7acda91..375bd76 100644
--- a/activities/tool_activities.py
+++ b/activities/tool_activities.py
@@ -8,6 +8,7 @@ from temporalio.common import RawValue
 import os
 from datetime import datetime
 import google.generativeai as genai
+import anthropic
 
 
 @dataclass
@@ -25,6 +26,8 @@ class ToolActivities:
             return self.prompt_llm_ollama(input)
         elif llm_provider == "google":
             return self.prompt_llm_google(input)
+        elif llm_provider == "anthropic":
+            return self.prompt_llm_anthropic(input)
         else:
             return self.prompt_llm_openai(input)
 
@@ -32,7 +35,7 @@ class ToolActivities:
         client = OpenAI(
             api_key=os.environ.get(
                 "OPENAI_API_KEY"
-            ),  # This is the default and can be omitted
+            ),
         )
 
         messages = [
@@ -123,6 +126,34 @@ class ToolActivities:
 
         return data
 
+    def prompt_llm_anthropic(self, input: ToolPromptInput) -> dict:
+        api_key = os.environ.get("ANTHROPIC_API_KEY")
+        if not api_key:
+            raise ValueError("ANTHROPIC_API_KEY is not set in the environment variables.")
+
+        client = anthropic.Anthropic(api_key=api_key)
+
+        response = client.messages.create(
+            model="claude-3-5-sonnet-20241022",
+            max_tokens=1024,
+            system=input.context_instructions,
+            messages=input.prompt
+        )
+
+        response_content = response.content[0].text
+        print(f"Anthropic response: {response_content}")
+
+        # Use the new sanitize function
+        response_content = self.sanitize_json_response(response_content)
+
+        try:
+            data = json.loads(response_content)
+        except json.JSONDecodeError as e:
+            print(f"Invalid JSON: {e}")
+            raise json.JSONDecodeError
+
+        return data
+
     def sanitize_json_response(self, response_content: str) -> str:
         """
         Extracts the JSON block from the response content as a string.
diff --git a/poetry.lock b/poetry.lock
index 11faa82..d8a9587 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -11,6 +11,30 @@ files = [
     {file = "annotated_types-0.7.0.tar.gz", hash = "sha256:aff07c09a53a08bc8cfccb9c85b05f1aa9a2a6f23728d790723543408344ce89"},
 ]
 
+[[package]]
+name = "anthropic"
+version = "0.45.0"
+description = "The official Python library for the anthropic API"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "anthropic-0.45.0-py3-none-any.whl", hash = "sha256:f36aff71d2c232945e64d1970be68a91b05a2ef5e3afa6c1ff195c3303a95ad3"},
+    {file = "anthropic-0.45.0.tar.gz", hash = "sha256:4e8541dc355332090bfc51b84549c19b649a13a23dbd6bd68e1d012e08551025"},
+]
+
+[package.dependencies]
+anyio = ">=3.5.0,<5"
+distro = ">=1.7.0,<2"
+httpx = ">=0.23.0,<1"
+jiter = ">=0.4.0,<1"
+pydantic = ">=1.9.0,<3"
+sniffio = "*"
+typing-extensions = ">=4.10,<5"
+
+[package.extras]
+bedrock = ["boto3 (>=1.28.57)", "botocore (>=1.31.57)"]
+vertex = ["google-auth (>=2,<3)"]
+
 [[package]]
 name = "anyio"
 version = "4.5.2"
@@ -1375,4 +1399,4 @@ standard = ["colorama (>=0.4)", "httptools (>=0.6.3)", "python-dotenv (>=0.13)",
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.9,<4.0"
-content-hash = "6607357cf7851b278f44b13b3eccbe4f5309d8c038bba3bdc2114b5989832ba2"
+content-hash = "a6b005e6cf77139e266ddf6b3263890f31a7b8813b3b5db95831d5fdb4d20239"
diff --git a/pyproject.toml b/pyproject.toml
index 908e4ba..1714482 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,6 +29,7 @@ python-dotenv = "^1.0.1"
 openai = "^1.59.2"
 stripe = "^11.4.1"
 google-generativeai = "^0.8.4"
+anthropic = "^0.45.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.3"