LangChain Cerebras

0.8.2 verified Mon Apr 27 auth: no python

An integration package that connects Cerebras AI models with the LangChain framework, currently at version 0.8.2. Releases are frequent, with minor and patch updates roughly every few weeks.

pip install langchain-cerebras

Common errors

error ImportError: cannot import name 'Cerebras' from 'langchain_community' ↓

cause The Cerebras integration has been moved out of langchain-community into its own package.

fix

Install langchain-cerebras and import from there: from langchain_cerebras import Cerebras

error ModuleNotFoundError: No module named 'langchain_openai' ↓

cause langchain-cerebras depends on langchain-openai for making API calls, but it might not be installed automatically.

fix

Run: pip install langchain-openai

error TypeError: ChatCerebras.__init__() got an unexpected keyword argument 'reasoning_effort' ↓

cause Attempting to use reasoning parameters with an older version of langchain-cerebras (before 0.8.0) that doesn't support them.

fix

Upgrade langchain-cerebras to >=0.8.0: pip install --upgrade langchain-cerebras

Warnings

breaking Version 0.8.0 introduced reasoning parameters support, which may require updates to existing code if using the previous simple generation interface. ↓

fix Review the changelog and adjust calls to include additional parameters like 'reasoning_effort' if needed.

deprecated The old import path 'from langchain_community.llms import Cerebras' is deprecated in favor of 'from langchain_cerebras import Cerebras'. ↓

fix Use the new import from langchain_cerebras instead.

gotcha The library requires Python 3.11 or 3.12; Python 3.13 is not supported as of version 0.8.2. ↓

fix Use Python 3.11 or 3.12.

Imports

Cerebras
```
from langchain_cerebras import Cerebras
```

ChatCerebras

from langchain_cerebras import ChatCerebras

CerebrasEmbeddings

wrong

from langchain_community.embeddings import CerebrasEmbeddings

correct

from langchain_cerebras import CerebrasEmbeddings

Community package is deprecated; use langchain-cerebras directly.

Quickstart

Initialize ChatCerebras with an API key and model name, then invoke a simple prompt.

import os
from langchain_cerebras import ChatCerebras

llm = ChatCerebras(
    model="llama3.1-8b",
    api_key=os.environ.get("CEREBRAS_API_KEY", ""),
    temperature=0.7
)
response = llm.invoke("Hello, how are you?")
print(response.content)