Registry / llm-agents / langchain-together

langchain-together

library0.4.0pypypi✓ verified 84d ago

An integration package connecting Together AI's API with LangChain. Provides chat models and embeddings. Current version 0.4.0, requires Python >=3.10, <4.0. Release cadence is irregular; latest releases include security patches and MCP server features.

llm-agents ai-ml

pip install langchain-together

github ↗package ↗homepage ↗changelog ↗

INSTALL

IMPORT

SIG · LANGCHAIN-TOGETHER

langchain-together

llm-agentspythonv0.4.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

ChatTogether

✓ from langchain_together import ChatTogether

✗ from langchain_together.chat import ChatTogether

Incorrect: ChatTogether is exposed at the top-level package.

TogetherEmbeddings

✓ from langchain_together import TogetherEmbeddings

✗ from langchain_together.embeddings import TogetherEmbeddings

Incorrect: embeddings are also at top-level.

Basic usage: instantiate ChatTogether with API key and model, then invoke.

import os from langchain_together import ChatTogether chat = ChatTogether( together_api_key=os.environ.get("TOGETHER_API_KEY", ""), model="mistralai/Mixtral-8x7B-Instruct-v0.1" ) response = chat.invoke("Hello, how are you?") print(response.content)

Debug

Known issues

breakingVersion 0.2.0 introduced a new package structure. If you were using the old langchain_together from community, imports must be updated to 'from langchain_together import ...' instead of 'from langchain.llms import Together'

fix

Change imports to the new package: from langchain_together import ChatTogether

affects: <0.2.0

deprecatedThe 'model' parameter used to accept model IDs like 'togethercomputer/llama-2-70b-chat'. These legacy IDs are deprecated in favor of Together AI's new model format (e.g., 'mistralai/Mixtral-8x7B-Instruct-v0.1').

fix

Use the new model naming convention as documented by Together AI.

affects: <0.3.0

gotchaThe environment variable for the API key is 'TOGETHER_API_KEY', not 'TOGETHER_AI_KEY' or 'TOGETHER_AI_API_KEY'.

fix

Set the correct environment variable or pass directly via 'together_api_key' parameter.

affects: all

gotchaChatTogether does not support all models available via Together AI's API. Some models may require additional parameters like 'temperature' or 'max_tokens' which are not passed through by default.

fix

Check LangChain documentation for supported models and pass extra kwargs if needed.

affects: all

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'langchain_together'

Package not installed or wrong import path (e.g., from langchain.llms import Together).

fix

Install with 'pip install langchain-together' and import as 'from langchain_together import ChatTogether'.

InvalidRequestError: 'model' is not a valid parameter

Passing the model name as a keyword argument 'model' when it should be passed as positional or via model_kwargs.

fix

Use the correct parameter name: ChatTogether(model='mistralai/Mixtral-8x7B-Instruct-v0.1') or ChatTogether(model_kwargs={'model': '...'}) – check the latest API.

AuthenticationError: 401 Unauthorized

API key missing or incorrect.

fix

Set the TOGETHER_API_KEY environment variable or pass the key via the 'together_api_key' parameter.

TypeError: __init__() got an unexpected keyword argument 'together_api_key'

Using an older version of langchain-together that expected the parameter name 'api_key' instead of 'together_api_key'.

fix

Upgrade to latest version: pip install --upgrade langchain-together

Upgrade

Version history

0.4.0latest on PyPI · released Mar 24, 2026

Audit

Dependencies

langchain-corerequiredRequired for base classes like BaseChatModel and embeddings interface.

togetherrequiredOfficial Together AI Python SDK, needed for API calls.

Agent activity

12 hits · last 30 days

node

Amazon

OpenAI (training)

Resources

githubhttps://github.com/langchain-ai/langchain-together ↗

packagehttps://pypi.org/project/langchain-together/ ↗

homepagehttps://together.ai ↗

changeloghttps://github.com/langchain-ai/langchain-together/releases ↗