adds anthropic model to instantiation method

prospector/llm/instantiation.py

@@ -4,11 +4,13 @@
 
 import requests
 from dotenv import load_dotenv
+from langchain_anthropic import ChatAnthropic
 from langchain_core.language_models.llms import LLM
 from langchain_google_vertexai import ChatVertexAI
 from langchain_mistralai import ChatMistralAI
 from langchain_openai import ChatOpenAI
 
+from llm.models.anthropic import Anthropic
 from llm.models.gemini import Gemini
 from llm.models.mistral import Mistral
 from llm.models.openai import OpenAI
@@ -26,6 +28,7 @@
     # "gpt-4o": OpenAI,  # currently TBD
     "gemini-1.0-pro": Gemini,
     "mistral-large": Mistral,
+    "claude-3-opus": Anthropic,
 }
 
 
@@ -37,6 +40,7 @@
     "gpt-3.5-turbo": (ChatOpenAI, "OPENAI_API_KEY"),
     "gemini-pro": (ChatVertexAI, "GOOGLE_API_KEY"),
     "mistral-large-latest": (ChatMistralAI, "MISTRAL_API_KEY"),
+    "claude-3-opus-20240229": (ChatAnthropic, "ANTRHOPIC_API_KEY"),
 }