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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.

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Subscription Plans

Choose the plan that fits your scale.
FeatureStarterPro (Popular)Enterprise
Monthly Cost$0$79Custom
Included Credits$0$50 / moCustom
Platform Fee$0.03 / min$0.02 / minVolume Discounts
Concurrent Calls52550+
Knowledge Base50 MBUnlimitedUnlimited
Retention30 Days90 DaysCustom
SupportEmailPriority (24hr)Dedicated Account Mgr
Pro Plan Savings: The Pro plan lowers the platform fee from 0.03to0.03 to 0.02 per minute. If you process over 3,000 minutes per month, the savings on the platform fee alone pay for the subscription.

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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.

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Language Models (LLM)

ProviderModelCost (Input / Output)Est. Cost / 1k Min
OpenAIGPT-4o2.50/2.50 / 10.00 per 1M tokens~$10.00
AnthropicClaude Sonnet 43.00/3.00 / 15.00 per 1M tokens~$15.00
OpenAIGPT-4o Mini0.15/0.15 / 0.60 per 1M tokens~$0.60
GoogleGemini 2.5 Flash0.30/0.30 / 2.50 per 1M tokens~$1.20

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Text-to-Speech (TTS)

ProviderVoice ModelCostEst. Cost / 1k Min
ElevenLabsTurbo v2$0.12 / 1k chars~$10.80
CartesiaSonic$0.04 / 1k chars~$3.60
DeepgramAura$0.015 / 1k chars~$1.35
OpenAITTS$0.015 / 1k chars~$1.35

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Speech-to-Text (STT)

ProviderModelCost / MinEst. Cost / 1k Min
DeepgramNova-2$0.0059$5.90
DeepgramBase$0.0043$4.30
AssemblyAINano$0.0034$3.40

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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)+ 0.60 (LLM) + ~1.35 (TTS) + 5.90(STT)=∗∗5.90 (STT) = **7.85**
  • Platform Fee: 1,000 min * 0.03=∗∗0.03 = **30.00**
  • Total Monthly Cost: $37.85

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How Credits Work

  • $1 = 1,000 Credits: Simple conversion rate.
  • Buy Anytime: Top up your balance whenever you need.
  • Never Expire: Your purchased credits roll over forever.