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

# A/B Testing

> Compare multiple agents by splitting traffic across them to test different prompts, voices, or flows.

A/B testing lets you compare multiple agents or scripts by sending a percentage of traffic to each. You define a traffic split (for example, 80% to one agent and 20% to another) so you can test different prompts, voices, or flows without changing your main agent.

## Where A/B Testing Is Available

A/B testing is supported for:

* **Inbound calls** — Calls received on a phone number
* **Outbound calls** — Calls made from a phone number
* **Inbound chats** — Incoming chat conversations
* **Outbound chats** — Chat sessions you initiate

## How It Works

1. **Multiple agents** — Bind two or more agents to the same number or chat configuration.
2. **Traffic split** — Set the percentage of traffic each agent receives (e.g., 80% / 20%). Traffic is distributed according to this split.
3. **Use cases** — Test different scripts on marketing or support calls, try prompt or voice changes, or compare conversation flows in chat.

## Where to Configure

| Context                   | Configure in                                                                                                                                                                                                           |
| ------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Inbound calls             | Number configuration: bind multiple agents to the number and set the traffic split. See [Receive Calls](/Deploy/inbound-call).                                                                                         |
| Outbound calls            | Number configuration: bind multiple agents for outbound and set the traffic split. See [Outbound Calls](/Deploy/outbound-call).                                                                                        |
| Chat (inbound & outbound) | Chat agent or widget configuration where you assign the chat agent; enable A/B testing and set the traffic split. See [Create Chat Completion](/Deploy/create-chat-completion) and [Chat Widget](/Deploy/chat-widget). |

<Steps>
  <Step title="Enable A/B Testing">
    On the phone number configuration page, find the **A/B Testing** toggle next to the Call Agent field. Turn it on to bind multiple agents.
  </Step>

  <Step title="Set traffic split">
    Click **Edit** to open the A/B Testing modal. Choose which agents to use and set a weight (percentage) for each. Weights must total 100%. Click **Deploy** to save.
  </Step>

  <Step title="Monitor results">
    After deploying, the Call Agent section shows each agent and its traffic percentage. Click **Edit** anytime to adjust agents or weights.
  </Step>
</Steps>

## View Analytics by Agent Version

After deploying an A/B test, compare performance by specific agent versions in the Analytics dashboard.

<Steps>
  <Step title="Open Analytics">
    Open **Analytics** in the UponAI dashboard.
  </Step>

  <Step title="Set date range">
    Set a date range that covers your experiment period.
  </Step>

  <Step title="Filter by agent">
    In the filter bar, click **Agent** (or click **Filter** and add Agent). In the left panel, select the agent(s) used in your A/B test.
  </Step>

  <Step title="Select versions">
    In the right panel, select the specific version(s) you want to analyze (e.g., Version 3 vs Version 4 of the same agent).
  </Step>

  <Step title="Apply and compare">
    Click **Save** to apply the filter. All charts update to the selected agent-version scope so you can compare metrics like call success rate, duration, and latency.
  </Step>
</Steps>

## A/B Testing vs Dynamic Agent Selection

|              | A/B Testing                            | Dynamic Selection (webhook / API)  |
| ------------ | -------------------------------------- | ---------------------------------- |
| **Best for** | Random percentage-based traffic splits | Per-call or per-chat routing logic |
| **Setup**    | Configure in dashboard                 | Implement custom webhook logic     |
| **Control**  | Percentage-based                       | Full programmatic control          |