LangChain

pip install langchain-openai

import os
from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    model="anthropic/claude-opus-4.8",
    openai_api_key=os.environ["OPENDUNES_API_KEY"],
    openai_api_base="https://opendunes.com/api/v1",
)

response = llm.invoke("What is the capital of Algeria?")
print(response.content)

import os
from langchain_openai import ChatOpenAI
from langchain_core.messages import HumanMessage

llm = ChatOpenAI(
    model="google/gemini-2.5-pro",
    openai_api_key=os.environ["OPENDUNES_API_KEY"],
    openai_api_base="https://opendunes.com/api/v1",
    streaming=True,
)

for chunk in llm.stream([HumanMessage(content="Tell me about Algiers in two sentences.")]):
    print(chunk.content, end="", flush=True)

import os
from langchain_openai import ChatOpenAI
from langchain_core.prompts import ChatPromptTemplate

llm = ChatOpenAI(
    model="meta-llama/llama-4-maverick",
    openai_api_key=os.environ["OPENDUNES_API_KEY"],
    openai_api_base="https://opendunes.com/api/v1",
)

prompt = ChatPromptTemplate.from_messages([
    ("system", "You are a helpful assistant. Answer concisely."),
    ("human", "{question}"),
])

chain = prompt | llm
result = chain.invoke({"question": "How do I top up my OpenDunes balance?"})
print(result.content)

npm install @langchain/openai

import { ChatOpenAI } from "@langchain/openai";

const llm = new ChatOpenAI({
  model: "anthropic/claude-sonnet-5",
  apiKey: process.env.OPENDUNES_API_KEY,
  configuration: {
    baseURL: "https://opendunes.com/api/v1",
  },
});

const response = await llm.invoke("What is the capital of Algeria?");
console.log(response.content);

import { ChatOpenAI } from "@langchain/openai";

const llm = new ChatOpenAI({
  model: "openai/gpt-5.4",
  apiKey: process.env.OPENDUNES_API_KEY,
  configuration: {
    baseURL: "https://opendunes.com/api/v1",
  },
  streaming: true,
});

const stream = await llm.stream("Write a haiku about the Atlas Mountains.");
for await (const chunk of stream) {
  process.stdout.write(chunk.content as string);
}