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Learn how to use the W&B Inference service through the web UI. Before using the UI, complete the prerequisites.

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Access the Inference service

You can access the Inference service from three places: Go to https://wandb.ai/inference.

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From the Inference tab

  1. Go to your W&B account at https://wandb.ai/
  2. Select Inference from the left sidebar
  3. A page displays with available models and model information
Using an Inference model in the Playground

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From the Playground tab

  1. Select Playground from the left sidebar. The Playground chat UI appears
  2. Hover over W&B Inference in the LLM dropdown list. A dropdown with available models appears on the right
  3. From the models dropdown, you can:
The Inference models dropdown in Playground

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Try a model in the Playground

After selecting a model, you can test it in the Playground. Available actions include:

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Compare multiple models

You can compare Inference models side by side in the Playground. Access the Compare view from two places:

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From the Inference tab

  1. Select Inference from the left sidebar. The available models page appears
  2. Click anywhere on a model card (except the model name) to select it. The card border turns blue
  3. Repeat for each model you want to compare
  4. Click Compare N models in the Playground on any selected card. N shows the number of models selected
  5. The comparison view opens
Now you can compare models and use all features from Try a model in the Playground.
Select multiple models to compare in Playground

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From the Playground tab

  1. Select Playground from the left sidebar. The Playground chat UI appears
  2. Hover over W&B Inference in the LLM dropdown list. The models dropdown appears on the right
  3. Select Compare from the dropdown. The Inference tab appears
  4. Click anywhere on a model card (except the model name) to select it. The card border turns blue
  5. Repeat for each model you want to compare
  6. Click Compare N models in the Playground on any selected card. The comparison view opens
Now you can compare models and use all features from Try a model in the Playground.

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View billing and usage information

Organization admins can track credit balance, usage history, and upcoming bills from the W&B UI:
  1. Go to the W&B Billing page in the UI
  2. Find the Inference billing information card in the bottom right corner
  3. From here you can:
    • Click View usage to see your usage over time
    • View upcoming inference charges (for paid plans)
Visit the Inference pricing page for per-model pricing details.

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Next steps