> ## Documentation Index
> Fetch the complete documentation index at: https://narev.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Weights & Biases Weave

> Pull production LLM traces from Weights & Biases Weave into a Narev benchmark so you can evaluate new model variants against real production prompts.

<Tip>
  Use your production traces as test datasets. Instead of guessing which model works better, test against the prompts
  your users are actually sending.
</Tip>

## Prerequisites

* An active W\&B account with Weave instrumentation
* W\&B API key
* Production traces in your Weave project

## Setup

1. Create a new **A/B test**
2. Navigate to **Setup** tab
3. In the **Data Source** section select \**Import from traces*
4. Select **W\&B Wave** as provider
5. Enter your credentials:
   * **Entity**: Your W\&B entity (username or team name)
   * **Project Name**: Your Weave project identifier
   * **API Key**: Your W\&B API key
6. Select your **Date Range** (default: last 7 days)
7. Click **Save Project** to import traces

<Frame>
  <img src="https://mintcdn.com/narev/Y1illty3WLN-yruS/images/benchmark/integration/wandb.webp?fit=max&auto=format&n=Y1illty3WLN-yruS&q=85&s=318a960bfeb36b720b4fe32714f139f1" alt="Import traces from Weights and Biases Weave interface" width="1568" height="1302" data-path="images/benchmark/integration/wandb.webp" />
</Frame>

## Common questions

<AccordionGroup>
  <Accordion title="Do I need to modify my W&B Weave setup?">
    No. Narev reads from your existing Weave project without any changes to your instrumentation.
  </Accordion>

  <Accordion title="Can I test models not in my current Weave traces?">
    Yes. Narev imports prompts and usage patterns from Weave, then lets you test any supported model provider on those
    same prompts.
  </Accordion>

  <Accordion title="Will Narev send data back to W&B Weave?">
    No. Narev imports traces to run experiments but doesn't write back to Weave.
  </Accordion>

  <Accordion title="Does this work with Weave's agent or chain tracing?">
    Yes. Narev imports all types of Weave operations including agents, chains, and individual LLM calls.
  </Accordion>
</AccordionGroup>