> ## Documentation Index > Fetch the complete documentation index at: https://docs.langchain.com/llms.txt > Use this file to discover all available pages before exploring further. # Chat model integrations > Integrate with chat models using LangChain Python. [Chat models](/oss/python/langchain/models) are language models that use a sequence of [messages](/oss/python/langchain/messages) as inputs and return messages as outputs (as opposed to traditional, plaintext LLMs). ## Featured models **While these LangChain classes support the indicated advanced feature**, you may need to refer to provider-specific documentation to learn which hosted models or backends support the feature.
| Model | Stream | [Tool calling](/oss/python/langchain/tools) | [Structured output](/oss/python/langchain/structured-output/) | [Multimodal](/oss/python/langchain/messages#multimodal) | Downloads | | :----------------------------------------------------------------------------- | :--------------------------------- | :------------------------------------------ | :------------------------------------------------------------ | :------------------------------------------------------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | [`AzureChatOpenAI`](/oss/python/integrations/chat/azure_chat_openai) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatOpenAI`](/oss/python/integrations/chat/openai) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatVertexAI`](/oss/python/integrations/chat/google_vertex_ai) (deprecated) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatAnthropic`](/oss/python/integrations/chat/anthropic) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatGoogleGenerativeAI`](/oss/python/integrations/chat/google_generative_ai) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatLiteLLM`](/oss/python/integrations/chat/litellm) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatDatabricks`](/oss/python/integrations/chat/databricks) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatOllama`](/oss/python/integrations/chat/ollama) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatGroq`](/oss/python/integrations/chat/groq) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatHuggingFace`](/oss/python/integrations/chat/huggingface) | ❌ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatMistralAI`](/oss/python/integrations/chat/mistralai) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatXAI`](/oss/python/integrations/chat/xai) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatCohere`](/oss/python/integrations/chat/cohere) | | | | | Downloads per month | | [`ChatNVIDIA`](/oss/python/integrations/chat/nvidia_ai_endpoints) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatDeepSeek`](/oss/python/integrations/chat/deepseek) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatOpenRouter`](/oss/python/integrations/chat/openrouter) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatTogether`](/oss/python/integrations/chat/together) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatAmazonNova`](/oss/python/integrations/chat/amazon_nova) | ✅ | ✅ | ✅ | | Downloads per month |
See the [full list of chat model integrations](#all-chat-models) below for more options. ## Routers & proxies Routers and proxies give you access to models from multiple providers through a single API and credential. They can simplify billing, let you switch between models without changing integrations, and offer features like automatic fallbacks. | Provider | Integration | Description | | --------------------------------------------------- | ------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------- | | [Agentic SpendGuard](https://agenticspendguard.dev) | [`SpendGuardChatModel`](https://agenticspendguard.dev) | Runtime budget gate that refuses LLM calls which would exceed spend limits before they reach the provider | | [Alephant AI](https://alephant.io/) | [`ChatAlephantAI`](https://alephant.io/) | AI gateway for cost control, bring-your-own-key routing, and access to models across multiple providers | | [OpenRouter](https://openrouter.ai/) | [`ChatOpenRouter`](/oss/python/integrations/chat/openrouter) | Unified access to models from OpenAI, Anthropic, Google, Meta, and more | | [LiteLLM](https://www.litellm.ai/) | [`ChatLiteLLMRouter`](/oss/python/integrations/chat/litellm) | Unified interface for OpenAI, Anthropic, Azure, Hugging Face, and more with routing and fallbacks | ## Chat Completions API Certain model providers offer endpoints that are compatible with OpenAI's [Chat Completions API](https://platform.openai.com/docs/api-reference/chat). In such cases, you can use [`ChatOpenAI`](/oss/python/integrations/chat/openai) with a custom `base_url` to connect to these endpoints for basic chat functionality. `ChatOpenAI` targets [official OpenAI API specifications](https://github.com/openai/openai-openapi) only. Non-standard response fields from third-party providers (e.g., `reasoning_content`, `reasoning`, `reasoning_details`) **are not extracted or preserved**. Use a provider-specific package when you need access to non-standard features. For instance, OpenRouter has a dedicated LangChain integration. See the [`ChatOpenRouter` guide](/oss/python/integrations/chat/openrouter) for setup and usage. [Snowflake Cortex REST API](https://docs.snowflake.com/en/user-guide/snowflake-cortex/cortex-rest-api) is fully compatible with both the OpenAI and Anthropic APIs. Use `ChatOpenAI` or `ChatAnthropic` with a custom `base_url` to access frontier models running within Snowflake's security perimeter. [Auxen](https://auxen.ai) hosts dedicated per-customer LLM endpoints with an OpenAI-compatible Chat Completions API. Use `ChatOpenAI` with a custom `base_url` and per-instance API key. [DaoXE](https://daoxe.com) is a multi-model API gateway with an OpenAI-compatible Chat Completions surface. Use `ChatOpenAI` with `base_url` `https://daoxe.com/v1` and an account-scoped model ID. [1Claw](https://docs.1claw.xyz) routes LLM calls through the Shroud TEE proxy with `ChatOpenAI` or `ChatAnthropic` and a custom `base_url`, keeping provider keys and secrets out of agent context. [Apertis](https://docs.apertis.ai) provides an OpenAI-compatible Chat Completions API. Use `ChatOpenAI` with `base_url` `https://api.apertis.ai/v1` and a model ID available to your account. ## All chat models
| Model | Stream | [Tool calling](/oss/python/langchain/tools) | [Structured output](/oss/python/langchain/structured-output/) | [Multimodal](/oss/python/langchain/messages#multimodal) | Downloads | | :------------------------------------------------------------------------------------------------------- | :--------------------------------- | :------------------------------------------ | :------------------------------------------------------------ | :------------------------------------------------------ | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [`AzureChatOpenAI`](/oss/python/integrations/chat/azure_chat_openai) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatOpenAI`](/oss/python/integrations/chat/openai) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`vLLM`](/oss/python/integrations/chat/vllm) | | | | | Downloads per month | | [`ChatAnthropicVertex`](/oss/python/integrations/chat/google_anthropic_vertex) | | | | | Downloads per month | | [`ChatVertexAI`](/oss/python/integrations/chat/google_vertex_ai) (deprecated) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatAnthropic`](/oss/python/integrations/chat/anthropic) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatAnthropicTools`](/oss/python/integrations/chat/anthropic_functions) | | | | | Downloads per month | | [`ChatGoogleGenerativeAI`](/oss/python/integrations/chat/google_generative_ai) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatBedrock`](/oss/python/integrations/chat/bedrock) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatLiteLLM`](/oss/python/integrations/chat/litellm) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatDatabricks`](/oss/python/integrations/chat/databricks) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatOllama`](/oss/python/integrations/chat/ollama) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatGroq`](/oss/python/integrations/chat/groq) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatHuggingFace`](/oss/python/integrations/chat/huggingface) | ❌ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatFireworks`](/oss/python/integrations/chat/fireworks) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatMistralAI`](/oss/python/integrations/chat/mistralai) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatXAI`](/oss/python/integrations/chat/xai) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatCohere`](/oss/python/integrations/chat/cohere) | | | | | Downloads per month | | [`ChatNVIDIA`](/oss/python/integrations/chat/nvidia_ai_endpoints) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`AzureAIChatCompletionsModel`](/oss/python/integrations/chat/azure_ai) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatDeepSeek`](/oss/python/integrations/chat/deepseek) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatOpenRouter`](/oss/python/integrations/chat/openrouter) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatWatsonx`](/oss/python/integrations/chat/ibm_watsonx) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatPerplexity`](/oss/python/integrations/chat/perplexity) | ✅ | ❌ | ✅ | ❌ | Downloads per month | | [`ChatSambaNova`](/oss/python/integrations/chat/sambanova) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatCerebras`](/oss/python/integrations/chat/cerebras) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatOCIGenerativeAI`](/oss/python/integrations/chat/oci_generative_ai) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatOCIModelDeployment`](/oss/python/integrations/chat/oci_data_science) | ✅ | | | | Downloads per month | | [`ChatBaseten`](/oss/python/integrations/chat/baseten) | | | | | Downloads per month | | [`ChatTogether`](/oss/python/integrations/chat/together) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatUpstage`](/oss/python/integrations/chat/upstage) | | | | | Downloads per month | | [`ChatQwen`](/oss/python/integrations/chat/qwen) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatQwQ`](/oss/python/integrations/chat/qwq) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatAI21`](https://docs.ai21.com/home) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatClovaX`](https://guide.ncloud-docs.com/docs/clovastudio-dev-langchain) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatMoonshot`](https://github.com/ArcadiaLin/langchain-moonshot) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatNebius`](https://github.com/nebius/langchain-nebius) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatParallel`](/oss/python/integrations/chat/parallel) | ✅ | ❌ | ✅ | ❌ | Downloads per month | | [`ChatAmazonNova`](/oss/python/integrations/chat/amazon_nova) | ✅ | ✅ | ✅ | | Downloads per month | | [`ChatCloudflareWorkersAI`](https://github.com/cloudflare/langchain-cloudflare) | ❌ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatGradient`](https://docs.digitalocean.com/products/ai-platform/) | | | | | Downloads per month | | [`ChatWriter`](https://dev.writer.com/home/introduction) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatCrusoe`](/oss/python/integrations/chat/crusoe) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`Apertis`](https://docs.apertis.ai/api/sdks/langchain/) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatContextual`](https://docs.contextual.ai/) | ❌ | ❌ | ❌ | ❌ | Downloads per month | | [`ChatAppleFoundationModels`](https://github.com/rajanshxrma/langchain-apple-foundation-models) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatSarvam`](https://docs.sarvam.ai/api/integration/langchain) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`SpendGuardChatModel`](https://agenticspendguard.dev) | | | | | Downloads per month | | [`ChatDoubleword`](https://docs.doubleword.ai/inference-api/intro-to-doubleword-inference) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatKServe`](https://gitlab.com/bitkaio/langchain/kserve-provider) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ModelScopeChatEndpoint`](https://github.com/modelscope/langchain-modelscope) | | | | | Downloads per month | | [`ChatPredictionGuard`](https://github.com/predictionguard/langchain-predictionguard) | | | | | Downloads per month | | [`ChatKinetica`](https://github.com/kineticadb/langchain-kinetica) | | | | | Downloads per month | | [`ChatYutoriNavigator`](https://docs.yutori.com) | | | | | Downloads per month | | [`ChatXinference`](https://github.com/TheSongg/langchain-xinference) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatAbso`](https://github.com/lunary-ai/langchain-abso) | | | | | Downloads per month | | [`ChatInterfaze`](https://interfaze.ai/docs) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatAIMLAPI`](https://docs.aimlapi.com/) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatRunPod`](https://docs.runpod.io/overview) | | | | | Downloads per month | | [`ChatFeatherlessAI`](https://github.com/featherless-ai-integrations/langchain-featherless-ai) | ✅ | ❌ | ❌ | ❌ | Downloads per month | | [`ChatAlephantAI`](https://alephant.io/) | | | | | Downloads per month | | [`ChatDiffbot`](https://github.com/diffbot/langchain-diffbot) | ✅ | ❌ | ❌ | ❌ | Downloads per month | | [`ChatPipeshift`](https://github.com/pipeshift-org/langchain-pipeshift) | ✅ | ❌ | ❌ | ✅ | Downloads per month | | [`ChatEmpirioLabs`](https://docs.empiriolabs.ai) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatNetmind`](https://github.com/protagolabs/langchain-netmind) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatNeuralwatt`](https://neuralwatt.com) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatGreenNode`](https://github.com/greennode-ai/langchain-greennode) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`ChatTelnyx`](https://developers.telnyx.com/docs/inference/models) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatDuel`](https://duelagents.com) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatKalibr`](https://kalibr.systems/docs) | | | | | Downloads per month | | [`ChatSeekrFlow`](https://github.com/benfaircloth/langchain-seekrflow) | ✅ | ✅ | ✅ | ❌ | Downloads per month | | [`ChatThalam`](https://thalam.ai/docs) | ✅ | ✅ | ✅ | ✅ | Downloads per month | | [`1Claw`](https://docs.1claw.xyz) | ✅ | ✅ | ✅ | ❌ | N/A | | [`Auxen`](https://auxen.ai) | ✅ | ✅ | ✅ | ❌ | N/A | | [`DaoXE`](https://daoxe.com) | ✅ | ✅ | ✅ | ✅ | N/A | | [`FuturMix`](https://futurmix.ai/) | ✅ | ✅ | ✅ | ✅ | N/A | | [`Snowflake Cortex REST API`](https://docs.snowflake.com/en/user-guide/snowflake-cortex/cortex-rest-api) | ✅ | ✅ | ✅ | ❌ | N/A | | [`TokenMix`](https://tokenmix.ai/docs) | ✅ | ✅ | ✅ | ❌ | N/A |
If you'd like to contribute an integration, see [Contributing integrations](/oss/python/contributing#add-a-new-integration). ***
[Connect these docs](/use-these-docs) to Claude, VSCode, and more via MCP for real-time answers. [Edit this page on GitHub](https://github.com/langchain-ai/docs/edit/main/src/oss/python/integrations/chat/index.mdx) or [file an issue](https://github.com/langchain-ai/docs/issues/new/choose).