LLM Configuration for Rasa Pro ≤ 3.10 | Rasa Documentation

LLM Configuration for Rasa Pro 3.11 and above

For Rasa Pro versions 3.11 and above, refer to the LLM Configuration for >=3.11 page.

Overview

This page applies to the following components which use LLMs:

All the above components can be configured to change:

the LLM provider
the model to be used

Starting with version Rasa Pro 3.10, CALM uses LiteLLM under the hood to integrate with different LLM providers. Hence, all LiteLLM's integrated providers are supported with CALM as well. We explicitly mention the settings required for the most frequently used ones in the sections below.

Warning: If you want to try a provider other than OpenAI / Azure OpenAI, it is recommended to install Rasa Pro versions >= 3.10.

Recommended Models

The table below documents the versions of each model we recommend for use with various Rasa components. As new models are published, Rasa will test these and where appropriate add them as a recommended model.

Component	Providing platform	Recommended models
`SingleStepLLMCommandGenerator`, `EnterpriseSearchPolicy`, `IntentlessPolicy`	OpenAI, Azure	`gpt-4-0613`
`ContextualResponseRephraser`	OpenAI, Azure	`gpt-4-0613`, `gpt-3.5-turbo-0125`
`MultiStepLLMCommandGenerator`	OpenAI, Azure	`gpt-4-turbo-2024-04-09`, `gpt-3.5-turbo-0125`, `gpt-3.5-turbo-1106`, `gpt-4o-2024-08-06`

Chat completion models

Default Provider

CALM is LLM agnostic and can be configured with different LLMs, but OpenAI is the default model provider. Majority of our experiments have been with models available on OpenAI or OpenAI Azure service. The performance of your assistant may vary when using other LLMs, but improvements can be made by tuning flow and collect step descriptions.

To configure components that use a chat completion model as the LLM, declare the configuration under the llm key of that component's configuration. For example:

   recipe: default.v1
   language: en
   pipeline:
   - name: SingleStepLLMCommandGenerator
     llm:
        ...

Required Parameters

There are certain required parameters under the llm key:

model - Specifies the name of the model identifier available from the LLM provider's documentation, for e.g. gpt-4-0613
provider - Unique identifier of the provider to be used for invoking the specified model.

   recipe: default.v1
   language: en
   pipeline:
   - name: SingleStepLLMCommandGenerator
     llm:
        model: gpt-4-0613
        provider: openai

Optional Parameters

The llm key also accepts inference time parameters like temperature, etc which are optional but can be useful in extracting the best performance out of the model being used. Please refer to the official LiteLLM documentation for a list of such parameters supported.

When configuring a particular provider, there are a few provider specific settings which are explained under each provider's individual sub-section below.

Important: If you switch to a different LLM provider, all default parameters for the old provider will be overridden with the default parameters of the new provider.

OpenAI

API Token

The API token authenticates your requests to the OpenAI API.

To configure the API token, follow these steps:

If you haven't already, sign up for an account on the OpenAI platform.
Navigate to the OpenAI Key Management page, and click on the "Create New Secret Key" button to initiate the process of obtaining <your-api-key>.
To set the API key as an environment variable, you can use the following command in a terminal or command prompt:

Linux/MacOS

export OPENAI_API_KEY=<your-api-key>

Windows

setx OPENAI_API_KEY <your-api-key>

Replace <your-api-key> with the actual API key you obtained from the OpenAI platform.

Configuration

There are no additional OpenAI specific parameters to be configured. However, there could be model specific parameters like temperature that you might want to modify. Names for such parameters can found in OpenAI's API documentation and defined under llm key of the component's configuration.

Model deprecations

OpenAI regularly publishes a deprecation schedule for its models. This schedule can be accessed in the documentation published by OpenAI.

Azure OpenAI Service

API Token

The API token authenticates your requests to the Azure OpenAI Service.

Set the API token as an environment variable. You can use the following command in a terminal or command prompt:

Linux/MacOS

export AZURE_API_KEY=<your-api-key>

Windows

setx AZURE_API_KEY <your-api-key>

Replace <your-api-key> with the actual API key you obtained from the Azure OpenAI Service platform.

Configuration

To access models provided by Azure OpenAI Service, there are a few additional parameters that need to be configured:

provider - Set to azure.
api_type - The type of API to use. This should be set to "azure" to indicate the use of Azure OpenAI Service.
api_base - The URL for your Azure OpenAI instance. An example might look like this: https://my-azure.openai.azure.com/.
api_version - The API version to use for this operation. This follows the YYYY-MM-DD format and the value should be enclosed in single or double quotes.
engine/deployment_name - Alias for deployment parameter. Name of the deployment on Azure.

Amazon Bedrock

Requirements:

Make sure you have rasa-pro>=3.10.x installed.
Install boto3>=1.28.57.
Set the following environment variables - AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_REGION_NAME.
(Optional) Might have to set AWS_SESSION_TOKEN if your organisation mandates the usage of temporary credentials for security.

Once the above steps are complete, edit config.yaml to use an appropriate model and set provider to bedrock:

    - name: SingleStepLLMCommandGenerator
      llm:
        provider: bedrock
        model: anthropic.claude-instant-v1

Other Providers

Other than the above mentioned providers, we have also tested support for the following providers:

Platform	`provider`	API-KEY variable
Anthropic	`anthropic`	`ANTHROPIC_API_KEY`
Cohere	`cohere`	`COHERE_API_KEY`
Mistral	`mistral`	`MISTRAL_API_KEY`
Together AI	`together_ai`	`TOGETHERAI_API_KEY`
Groq	`groq`	`GROQ_API_KEY`

Embedding models

To configure components that use an embedding model, declare the configuration under the embeddings key of that component's configuration. For example:

pipeline:
  - name: "SingleStepLLMCommandGenerator"
    llm:
      model: gpt-4-0613
    flow_retrieval:
      embeddings:
        ...

The embeddings property needs two mandatory parameters:

model - Specifies the name of the model identifier available from the LLM provider's documentation, for e.g. text-embedding-3-large.
provider - Unique identifier of the provider to be used for invoking the specified model, for e.g. openai

Configuring self-signed SSL certificates

In environments where a proxy performs TLS interception, Rasa may need to be configured to trust the certificates used by your proxy. By default, certificates are loaded from the OS certificate store. However, if your setup involves custom self-signed certificates, you can specify these by setting the RASA_CA_BUNDLE environment variable.

This variable points to the path of the certificate file that Rasa should use to validate SSL connections:

export RASA_CA_BUNDLE="path/to/your/certificate.pem"

Configuring Proxy URLs

In environments where LLM requests need to be routed through a proxy, Rasa relies on LiteLLM to handle proxy configurations. LiteLLM supports configuring proxy URLs through the HTTP_PROXY and HTTPS_PROXY environment variables.

To ensure that all LLM requests are routed through the proxy, you can set the environment variables as follows:

export HTTP_PROXY="http://your-proxy-url:port"
export HTTPS_PROXY="https://your-proxy-url:port"

FAQ

Does OpenAI use my data to train their models?

No. OpenAI does not use your data to train their models. From their website:

We do not train our models on your business data by default.

Example Configurations

Azure

A comprehensive example which includes:

llm and embeddings configuration for components in config.yml:
- IntentlessPolicy
- EnterpriseSearchPolicy
- SingleStepLLMCommandGenerator
- flow_retrieval in 3.8.x
llm configuration for rephrase in endpoints.yml (ContextualResponseRephraser)

endpoints.yml
nlg:
  type: rasa_plus.ml.ContextualResponseRephraser
  llm:
    engine: rasa-gpt-4
    api_type: azure
    api_version: "2024-02-15-preview"
    api_base: https://my-azure.openai.azure.com
    request_timeout: 7

config.yml
recipe: default.v1
language: en
pipeline:
  - name: LLMCommandGenerator
    llm:
      engine: rasa-gpt-4
      api_type: azure
      api_base: https://my-azure.openai.azure.com/
      api_version: "2024-02-15-preview"
      request_timeout: 7

policies:
  - name: FlowPolicy
  - name: rasa_plus.ml.IntentlessPolicy
    llm:
      engine: rasa-gpt-4
      api_type: azure
      api_base: https://my-azure.openai.azure.com/
      api_version: "2024-02-15-preview"
      request_timeout: 7
    embeddings:
      model: text-embedding-3-small
      engine: rasa-embedding-small
      api_type: azure
      api_base: https://my-azure.openai.azure.com/
      api_version: "2024-02-15-preview"
      request_timeout: 7
  - name: rasa_plus.ml.EnterpriseSearchPolicy
    vector_store:
      type: "faiss"
      threshold: 0.0
    llm:
      model: gpt-4-0613
      engine: rasa-gpt-4
      api_type: azure
      api_base: https://my-azure.openai.azure.com/
      api_version: "2024-02-15-preview"
      request_timeout: 7
    embeddings:
      model: text-embedding-3-small
      engine: rasa-embedding-small
      api_type: azure
      api_base: https://my-azure.openai.azure.com/
      api_version: "2024-02-15-preview"
      request_timeout: 7