# Pricing, Limits and Settings

## Pricing {#pricing}

> $0.10 per minute of AI conversation, billed per second. No monthly fee for the agent; numbers, metered inbound, transfers and SMS are billed as usual.

In practice:

- You pay for the time the agent spends in conversation, to the second. A 2 minute 30 second conversation costs $0.25.
- Creating, saving and publishing agents is free. Publishing needs a balance of at least $10, but nothing is charged.
- Your FlyNumber's own charges don't change: the number's regular fee, per-minute charges on metered inbound and toll-free numbers, [transfers](knowledge-and-transfers.md#transfer-targets) to phone numbers at your normal forwarding rate, and SMS.
- AI conversation is paid from your prepaid balance. Each call's charge appears in the agent's [call history](messages-and-call-history.md#charge).

## Monthly ceiling {#monthly-ceiling}

The monthly ceiling caps how much your agents can spend on AI conversation in a calendar month. It covers all your agents together: it's one amount for the whole account, so changing it on one agent's **Calls & limits** tab changes it for all of them.

It starts at **$50 per month** and can be set anywhere from **$5 to $500**.

To change it, open any agent's **Calls & limits** tab, type the amount next to **Monthly ceiling**, and click **Save**. An amount outside the range shows *Enter an amount between $5.00 and $500.00.*

When the ceiling is reached, callers go to your [fallback](#fallback) until the next month starts.

:::info[Why a call can go to the fallback just before the ceiling]
A call in progress reserves part of your ceiling: it counts as a full 5-minute conversation ($0.50) until it ends and its real charge is known. A new call also needs that much room left under the ceiling to start. So a call can be sent to your fallback slightly before your spending reaches the ceiling.
:::

## Settings {#settings}

The **Settings** card on each agent's **Calls & limits** tab holds settings that apply immediately. They aren't part of a saved version, so there's no need to save or publish the agent after changing them.

![Settings card with the hidden-callers switch on, a fallback phone number, a $50.00 monthly ceiling, the 5-minute maximum call length, and the connected number](/docs/ai-voice-agents/img/ai-agent-settings.png)

| Setting | What it does | Default |
|---|---|---|
| **Answer callers who hide their number** | On: the agent answers callers who've hidden their caller ID. Off: those callers go to your fallback | On |
| **Fallback phone number** | Where callers go if the agent can't take the call. Enter it with its country code, for example `+1 207 555 0182`. Leave it empty to use voicemail or an unavailable message | Empty |
| **Monthly ceiling** | See [Monthly ceiling](#monthly-ceiling). Shared by all your agents | $50 |
| **Maximum call length** | 5 minutes. Shown for reference; it can't be changed | — |
| **Numbers** | The numbers connected to this agent, or *None yet*. To connect one, see [Connect a number](publish-and-connect.md#connect-a-number) | — |

**Answer callers who hide their number** and **Fallback phone number** are set per agent. The monthly ceiling is one setting for your whole account.

## When calls go to your fallback {#fallback}

The fallback takes calls the agent can't answer at all:

- The caller hid their number and **Answer callers who hide their number** is off.
- Your [monthly ceiling](#monthly-ceiling) has been reached.
- Your account already has 2 AI calls in progress.
- Your available balance is too low to cover the call.
- The agent is suspended, or can't take calls for another reason.

Those calls go to the **Fallback phone number** if you've set one; otherwise to voicemail or an unavailable message. They show as **Blocked** in the agent's [call history](messages-and-call-history.md#result), with the reason, and there's no AI charge for them.

The 5-minute limit works differently. When an AI conversation reaches 5 minutes, the call ends; it isn't passed to the fallback.

## Limits {#limits}

| Limit | Value |
|---|---|
| Agents per account | 10 |
| AI calls in progress at once, per account | 2 |
| Length of an AI conversation | 5 minutes |
| Monthly ceiling | $5 to $500 (default $50), per account |
| Balance needed to publish | $10 |
| Rules per agent | 20 |
| Transfer targets per account | 20 |
| Transfer targets used by one agent | 10 |
| [Message destinations](message-destinations.md) per account | 20 |
| Saved versions per agent | 200 |
| Agent name | 80 characters |
| Who does the agent answer calls for? | 200 characters |
| How should the agent behave? | 600 characters |
| Opening line | 120 characters |
| Each rule's **When…** text | 200 characters |
| What should the agent know? | 4,000 characters |
| Text used (all of the agent's instructions together) | 6,000 ([details](create-an-agent.md#text-used)) |
| Voices | Marin |
| Languages | Greeting in 16 languages; the agent speaks the language of your text, then the caller's ([details](create-an-agent.md#greeting-language)) |