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LlamaIndex LLMs Integration: IBM

llama-index-integrations/llms/llama-index-llms-ibm/README.md

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LlamaIndex LLMs Integration: IBM

This package integrates the LlamaIndex LLMs API with the IBM watsonx.ai Foundation Models API by leveraging ibm-watsonx-ai SDK. With this integration, you can use one of the models that are available in IBM watsonx.ai to perform model inference.

Installation

bash
pip install llama-index-llms-ibm

Usage

Setting up

To use IBM's models, you must have an IBM Cloud user API key. Here's how to obtain and set up your API key:

  1. Obtain an API Key: For more details on how to create and manage an API key, refer to Managing user API keys.
  2. Set the API Key as an Environment Variable: For security reasons, it's recommended to not hard-code your API key directly in your scripts. Instead, set it up as an environment variable. You can use the following code to prompt for the API key and set it as an environment variable:
python
import os
from getpass import getpass

watsonx_api_key = getpass()
os.environ["WATSONX_APIKEY"] = watsonx_api_key

Alternatively, you can set the environment variable in your terminal.

  • Linux/macOS: Open your terminal and execute the following command:

    bash
    export WATSONX_APIKEY='your_ibm_api_key'

    To make this environment variable persistent across terminal sessions, add the above line to your ~/.bashrc, ~/.bash_profile, or ~/.zshrc file.

  • Windows: For Command Prompt, use:

    cmd
    set WATSONX_APIKEY=your_ibm_api_key

Loading the model

You might need to adjust model parameters for different models or tasks. For more details on parameters, see Available MetaNames.

python
temperature = 0.5
max_new_tokens = 50
additional_params = {
    "min_new_tokens": 1,
    "top_k": 50,
}

Initialize the WatsonxLLM class with the previously set parameters.

python
from llama_index.llms.ibm import WatsonxLLM

watsonx_llm = WatsonxLLM(
    model_id="ibm/granite-4-h-small",
    url="PASTE_YOUR_URL_HERE",
    project_id="PASTE_YOUR_PROJECT_ID_HERE",
    temperature=temperature,
    max_new_tokens=max_new_tokens,
    additional_params=additional_params,
)

Note:

  • To provide context for the API call, you must pass the project_id or space_id. To get your project or space ID, open your project or space, go to the Manage tab, and click General. For more information see: Project documentation or Deployment space documentation.
  • Depending on the region of your provisioned service instance, use one of the URLs listed in watsonx.ai API Authentication.
  • You need to specify the model you want to use for inferencing through model_id. You can find the list of available models in Supported foundation models.

Alternatively, you can use Cloud Pak for Data credentials. For more details, refer to watsonx.ai software setup.

python
watsonx_llm = WatsonxLLM(
    model_id="ibm/granite-4-h-small",
    url="PASTE YOUR URL HERE",
    username="PASTE_YOUR_USERNAME_HERE",
    password="PASTE_YOUR_PASSWORD_HERE",
    instance_id="openshift",
    version="5.2",
    project_id="PASTE_YOUR_PROJECT_ID_HERE",
    temperature=temperature,
    max_new_tokens=max_new_tokens,
    additional_params=additional_params,
)

Create a Completion

Below is an example that shows how to call the model directly using a string type prompt:

python
response = watsonx_llm.complete("What is a Generative AI?")
print(response)

Calling chat with a list of messages

To create chat completions by providing a list of messages, use the following code:

python
from llama_index.core.llms import ChatMessage

messages = [
    ChatMessage(role="system", content="You are an AI assistant"),
    ChatMessage(role="user", content="Who are you?"),
]
response = watsonx_llm.chat(messages)
print(response)

Streaming the model output

To stream the model output, use the following code:

python
for chunk in watsonx_llm.stream_complete(
    "Describe your favorite city and why it is your favorite."
):
    print(chunk.delta, end="")

Similarly, to stream the chat completions, use the following code:

python
messages = [
    ChatMessage(role="system", content="You are an AI assistant"),
    ChatMessage(role="user", content="Who are you?"),
]

for chunk in watsonx_llm.stream_chat(messages):
    print(chunk.delta, end="")