ChatCerebras

export CEREBRAS_API_KEY="your-api-key"

# export LANGSMITH_TRACING="true"
# export LANGSMITH_API_KEY="your-api-key"

import { ChatCerebras } from "@langchain/cerebras"

const llm = new ChatCerebras({
    model: "llama-3.3-70b",
    temperature: 0,
    maxTokens: undefined,
    maxRetries: 2,
    // other params...
})

const aiMsg = await llm.invoke([
    {
      role: "system",
      content: "You are a helpful assistant that translates English to French. Translate the user sentence.",
    },
    { role: "user", content: "I love programming." },
])
aiMsg

AIMessage {
  "id": "run-17c7d62d-67ac-4677-b33a-18298fc85e35",
  "content": "J'adore la programmation.",
  "additional_kwargs": {},
  "response_metadata": {
    "id": "chatcmpl-2d1e2de5-4239-46fb-af2a-6200d89d7dde",
    "created": 1735785598,
    "model": "llama-3.3-70b",
    "system_fingerprint": "fp_2e2a2a083c",
    "object": "chat.completion",
    "time_info": {
      "queue_time": 0.00009063,
      "prompt_time": 0.002163031,
      "completion_time": 0.012339628,
      "total_time": 0.01640915870666504,
      "created": 1735785598
    }
  },
  "tool_calls": [],
  "invalid_tool_calls": [],
  "usage_metadata": {
    "input_tokens": 55,
    "output_tokens": 9,
    "total_tokens": 64
  }
}

console.log(aiMsg.content)

J'adore la programmation.

const messages = [
  {
    role: "system",
    content: "You are a math tutor that handles math exercises and makes output in json in format { result: number }.",
  },
  { role: "user",  content: "2 + 2" },
];

const aiInvokeMsg = await llm.invoke(messages, { response_format: { type: "json_object" } });

// if you want not to pass response_format in every invoke, you can bind it to the instance
const llmWithResponseFormat = llm.bind({ response_format: { type: "json_object" } });
const aiBindMsg = await llmWithResponseFormat.invoke(messages);

// they are the same
console.log({ aiInvokeMsgContent: aiInvokeMsg.content, aiBindMsg: aiBindMsg.content });

{ aiInvokeMsgContent: '{"result":4}', aiBindMsg: '{"result":4}' }