> ## Documentation Index
> Fetch the complete documentation index at: https://promptlayer-1023-gorgias-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# FAQ

Frequently Asked Questions

Don't see your question here? Send a message in [Discord](https://discord.gg/DBAhQbW39S) or email us at [hello@promptlayer.com](mailto:hello@promptlayer.com)

## I'm having trouble with the LangChain integration.

Try updating both LangChain and PromptLayer to their most recent versions.

## Do you support OpenAI function calling?

Yes, we take great pride in staying up to date. PromptLayer is 1-to-1 with OpenAI's library. That means, if you are using PromptLayer+OpenAI through the Python libraries, [function calling](https://openai.com/blog/function-calling-and-other-api-updates) will be implicitly supported.

If you are using our REST library, [track-request](/reference/track-request) mirrors OpenAI's request schema. You can add `functions` into `kwargs` and use function-type messages as you would use normal messages in `gpt-4`.

## Does PromptLayer support streaming?

Streaming requests are supported on the PromptLayer Python SDK (both with OpenAI and Antrhopic).

If you are using [LangChain](/languages/langchain), streaming is only supported when you use the `PromptLayerCallbackHandler`. Streaming is not supported through the PromptLayer-specific LLMs (the old way to use LangChain).

Finally, if you are interacting with PromptLayer through our [REST API](/languages/rest-api) you will need to store the whole output and log it to PromptLayer (`track-request`) only after it is finished.

## Can I export my data from PromptLayer?

Yes. You can export your usage data with the button shown below.

Filter your training data export by tags, a search query, or metadata.

<video controls="controls">
  <source src="https://mintlify.s3-us-west-1.amazonaws.com/promptlayer-1023-gorgias-docs/videos/export.mp4" type="video/mp4" />
</video>

## Do you support on-premises deployment?

Yes, we do support on-premises deployment for a select few of our enterprise customers. However, we are rolling out this option slowly.

If you are interested in onprem, please [contact us](mailto:hello@promptlayer.com) for more information.

## Does AsyncOpenAI work with PromptLayer?

Yes, AsyncOpenAI is compatible with PromptLayer. Use them together as demonstrated in example below.

```python
import asyncio
# from openai import AsyncOpenAI
import promptlayer
promptlayer.api_key = "pl_*****"
AsyncOpenAI = promptlayer.openai.AsyncOpenAI

client = AsyncOpenAI(
    api_key="sk-***",
)


async def main() -> None:
    chat_completion = await client.chat.completions.create(
        messages=[
            {
                "role": "user",
                "content": "Say this is a test",
            }
        ],
        model="gpt-3.5-turbo",
    )
    print(chat_completion)

asyncio.run(main())
```