Migrate from LangChain's ChatOpenAI default endpoint to TokenRex

Steps

• Create a TokenRex API key.
• Pass base_url and api_key to ChatOpenAI.
• Change the model to any enabled ID.

What to check after switching

• Run your existing test prompts and compare replies.
• Check the usage field in responses to confirm token counts and costs.
• Short model IDs are used on TokenRex, for example gpt-6-sol rather than openai/gpt-6-sol.

Example

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(model="claude-sonnet-5", api_key="YOUR_TOKENREX_KEY", base_url="https://tokenrex.ai/api/public")
print(llm.invoke("Hello").content)

Questions

Can I switch back?

Yes. Nothing is locked in: change the base URL and key back and your code keeps working.