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

# Pricing

> Simple, transparent pricing. Pay for what you use, not what you might.

Butter AI uses a credit-based pricing model with optional subscription tiers for advanced features. You pay a small platform fee per minute plus the direct cost of the AI providers you choose.

## Subscription Plans

Choose the plan that fits your scale.

| Feature              | Starter      | Pro (Popular)   | Enterprise            |
| :------------------- | :----------- | :-------------- | :-------------------- |
| **Monthly Cost**     | **\$0**      | **\$79**        | **Custom**            |
| **Included Credits** | \$0          | \$50 / mo       | Custom                |
| **Platform Fee**     | \$0.02 / min | \$0.0125 / min  | Volume Discounts      |
| **Concurrent Calls** | 5            | 25              | Custom                |
| **Knowledge Base**   | 20 Pages     | 50 Pages        | Custom                |
| **Retention**        | 30 Days      | 90 Days         | Custom                |
| **Support**          | Email        | Priority (24hr) | Dedicated Account Mgr |

<Note>
  **Pro Plan Savings**: The Pro plan lowers the platform fee from $0.02 to $0.0125 per minute. If you process over 10,500 minutes per month, the savings on the platform fee alone pay for the subscription.
</Note>

## Provider Costs (Pass-through)

We pass through the costs from AI providers directly to you with **zero markup**. You can mix and match providers to optimize for cost or quality.

### Language Models (LLM)

| Provider      | Model            | Cost (Input / Output)        | Est. Cost / 1k Min |
| :------------ | :--------------- | :--------------------------- | :----------------- |
| **OpenAI**    | GPT-4o           | $2.50 / $10.00 per 1M tokens | \~\$10.00          |
| **Anthropic** | Claude Sonnet 4  | $3.00 / $15.00 per 1M tokens | \~\$15.00          |
| **OpenAI**    | GPT-4o Mini      | $0.15 / $0.60 per 1M tokens  | \~\$0.60           |
| **Google**    | Gemini 2.5 Flash | $0.30 / $2.50 per 1M tokens  | \~\$1.20           |

### Text-to-Speech (TTS)

| Provider       | Voice Model | Cost               | Est. Cost / 1k Min |
| :------------- | :---------- | :----------------- | :----------------- |
| **ElevenLabs** | Turbo v2    | \$0.12 / 1k chars  | \~\$10.80          |
| **Cartesia**   | Sonic       | \$0.04 / 1k chars  | \~\$3.60           |
| **Deepgram**   | Aura        | \$0.015 / 1k chars | \~\$1.35           |
| **OpenAI**     | TTS         | \$0.015 / 1k chars | \~\$1.35           |

### Speech-to-Text (STT)

| Provider       | Model  | Cost / Min | Est. Cost / 1k Min |
| :------------- | :----- | :--------- | :----------------- |
| **Deepgram**   | Nova-2 | \$0.0059   | \$5.90             |
| **Deepgram**   | Base   | \$0.0043   | \$4.30             |
| **AssemblyAI** | Nano   | \$0.0034   | \$3.40             |

## Example Cost Calculation

**Scenario**: You are on the **Starter Plan** and handle **1,000 minutes** of calls using a "Balanced" stack.

* **Stack**: GPT-4o Mini + Deepgram Aura + Deepgram Nova-2
* **Provider Cost**: \~$0.60 (LLM) + ~$1.35 (TTS) + $5.90 (STT) = **$7.85\*\*
* **Platform Fee**: 1,000 min \* $0.02 = **$20.00\*\*
* **Total Monthly Cost**: **\$27.85**

## Billing and Payments

Butter AI uses **Dodo Payments** as our secure payment provider to handle all transactions.

### How Credits Work (`/api/billing/credits/purchase`)

* **\$1 = 1,000 Credits**: Simple conversion rate. You purchase credits that are drawn down as you use the platform.
* **Buy Anytime**: Top up your balance whenever you need via the billing dashboard. The purchase flow creates a one-time Dodo checkout session.
* **All Plans**: Starter, Pro, and Enterprise users can purchase credits at any time.

### Subscribing to Pro (`/api/billing/subscribe`)

Upgrading to the Pro plan creates a recurring subscription via Dodo Payments.

* **Cost**: \$79.00/month.
* **Benefits**: Unlocks the $0.0125/minute lower platform fee, 25 concurrent calls, 90-day retention, and gives you $50 of included credits each month.
* **Flow**: Initiating an upgrade routes you to a Dodo checkout session to securely set up your recurring payment.

### Customer Portal (`/api/billing/portal`)

Manage your payment methods and subscriptions easily:

* **Access**: All paying users can access the Dodo Customer Portal.
* **Capabilities**: Update your payment method, view and download past invoices, and cancel your active subscription directly from the portal.