openai[patch], docs: readme (#15773)

docs/docs/integrations/platforms/openai.mdx

@@ -13,15 +13,12 @@ All functionality related to OpenAI
 >[ChatGPT](https://chat.openai.com) is the Artificial Intelligence (AI) chatbot developed by `OpenAI`.
 
 ## Installation and Setup
-- Install the Python SDK with
+
+- Install the LangChain partner package
 ```bash
-pip install openai
+pip install langchain-openai
 ```
 - Get an OpenAI api key and set it as an environment variable (`OPENAI_API_KEY`)
-- If you want to use OpenAI's tokenizer (only available for Python 3.9+), install it
-```bash
-pip install tiktoken
-```
 
 
 ## LLM

libs/partners/openai/README.md

@@ -1 +1,56 @@
 # langchain-openai
+
+This package contains the LangChain integrations for OpenAI through their `openai` SDK.
+
+## Installation and Setup
+
+- Install the LangChain partner package
+```bash
+pip install langchain-openai
+```
+- Get an OpenAI api key and set it as an environment variable (`OPENAI_API_KEY`)
+
+
+## LLM
+
+See a [usage example](http://python.langchain.com/docs/integrations/llms/openai).
+
+```python
+from langchain_openai import OpenAI
+```
+
+If you are using a model hosted on `Azure`, you should use different wrapper for that:
+```python
+from langchain_openai import AzureOpenAI
+```
+For a more detailed walkthrough of the `Azure` wrapper, see [here](http://python.langchain.com/docs/integrations/llms/azure_openai)
+
+
+## Chat model
+
+See a [usage example](http://python.langchain.com/docs/integrations/chat/openai).
+
+```python
+from langchain_openai import ChatOpenAI
+```
+
+If you are using a model hosted on `Azure`, you should use different wrapper for that:
+```python
+from langchain_openai import AzureChatOpenAI
+```
+For a more detailed walkthrough of the `Azure` wrapper, see [here](http://python.langchain.com/docs/integrations/chat/azure_chat_openai)
+
+
+## Text Embedding Model
+
+See a [usage example](http://python.langchain.com/docs/integrations/text_embedding/openai)
+
+```python
+from langchain_openai import OpenAIEmbeddings
+```
+
+If you are using a model hosted on `Azure`, you should use different wrapper for that:
+```python
+from langchain_openai import AzureOpenAIEmbeddings
+```
+For a more detailed walkthrough of the `Azure` wrapper, see [here](https://python.langchain.com/docs/integrations/text_embedding/azureopenai)