Before deploying your AI Orchestrator node on the Livepeer AI network, you must choose the AI models you want to serve for AI inference tasks. This guide assists in configuring these models. The following page, Download AI Models, provides instructions for their download. For details on supported pipelines and models, refer to Pipelines.

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Configuration File Format

Orchestrators specify supported AI models in an aiModels.json file, typically located in the ~/.lpData directory. Below is an example configuration showing currently recommended models and their respective prices.

Pricing used in this example is subject to change and should be set competitively based on market research and costs to provide the compute.

[
  {
    "pipeline": "text-to-image",
    "model_id": "SG161222/RealVisXL_V4.0_Lightning",
    "price_per_unit": 4768371,
  },
  {
    "pipeline": "upscale",
    "model_id": "stabilityai/stable-diffusion-x4-upscaler",
    "price_per_unit": "0.5e-2USD",
    "warm": true,
    "optimization_flags": {
      "SFAST": true,
      "DEEPCACHE": false
    }
  },
  {
    "pipeline": "audio-to-text",
    "model_id": "openai/whisper-large-v3",
    "price_per_unit": 12882811,
    "pixels_per_unit": 1,
    "currency": "USD",
    "url": "<CONTAINER_URL>:<PORT>",
    "token": "<OPTIONAL_BEARER_TOKEN>",
    "capacity": 1
  }
]

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Key Configuration Fields

During the Beta phase, only one “warm” model per GPU is supported.

pipeline
string
required

The inference pipeline to which the model belongs (e.g., text-to-image).

model_id
string
required

The Hugging Face model ID.

price_per_unit
integer
required

The price in Wei per unit, which varies based on the pipeline (e.g., per pixel for image-to-video).

warm
boolean

If true, the model is preloaded on the GPU to decrease runtime.

optimization_flags
object

Optional flags to enhance performance (details below).

url
string

Optional URL and port where the model container or custom container manager software is running.
See External Containers

token
string

Optional token required to interact with the model container or custom container manager software.
See External Containers

capacity
integer

Optional capacity of the model. This is the number of inference tasks the model can handle at the same time. This defaults to 1.
See External Containers

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Optimization Flags

These flags are still experimental and may not always perform as expected. If you encounter any issues, please report them to the go-livepeer repository.

At this time, these flags are only compatible with warm models.

The Livepeer AI pipelines offer a suite of optimization flags. These are designed to enhance the performance of warm models by either increasing inference speed or reducing VRAM usage. Currently, the following flags are available:

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Image-to-video Pipeline Optimization

SFAST
boolean

The SFAST flag enables the Stable Fast optimization framework, potentially boosting inference speed by up to 25% with no quality loss. Cannot be used in conjunction with DEEPCACHE.

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Text-to-image Pipeline Optimization

DO NOT enable DEEPCACHE for Lightning/Turbo models since they’re already optimized. Due to known limitations, it does not provide speed benefits and may significantly lower image quality.

DEEPCACHE
boolean

The DEEPCACHE flag enables the DeepCache optimization framework, which can enhance inference speed by up to 50% with minimal quality loss. The speedup becomes more pronounced as the number of inference steps increases. Cannot be used simultaneously with SFAST.

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External Containers

This feature is intended for advanced users. Incorrect setup can lead to a lower orchestrator score and reduced fees. If external containers are used, it is the Orchestrator’s responsibility to ensure the correct container with the correct endpoints is running behind the specified url.

External containers can be for one model to stack on top of managed model containers, an auto-scaling GPU cluster behind a load balancer or anything in between. Orchestrators can use external containers to extend the models served or fully replace the AI Worker managed model containers using the Docker client Go library to start and stop containers specified at startup of the AI Worker.

External containers can be used by specifying the url, capacity and token fields in the model configuration. The only requirement is that the url specified responds as expected to the AI Worker same as the managed containers would respond (including http error codes). As long as the container management software acts as a pass through to the model container you can use any container management software to implement the custom management of the runner containers including Kubernetes, Podman, Docker Swarm, Nomad, or custom scripts to manage container lifecycles based on request volume

  • The url set will be used to confirm a model container is running at startup of the AI Worker using the /health endpoint. Inference requests will be forwarded to the url same as they are to the managed containers after startup.
  • The capacity should be set to the maximum amount of requests that can be processed concurrently for the pipeline/model id (default is 1). If auto scaling containers, take care that the startup time is fast if setting warm: true because slow response time will negatively impact your selection by Gateways for future requests.
  • The token field is used to secure the model container url from unauthorized access and is strongly suggested to use if the containers are exposed to external networks.

We welcome feedback to improve this feature, so please reach out to us if you have suggestions to enable better experience running external containers.

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