specification: API Commons Plans
specificationVersion: '0.1'
schema: https://raw.githubusercontent.com/api-evangelist/interface-research/main/schema/api-commons.yml#/$defs/Plans
provider: Smallest AI
providerId: smallest-ai
created: '2026-06-21'
modified: '2026-06-21'
reconciled: false
tags:
- AI
- Text to Speech
- Voice
- Realtime
- Voice Agents
- Plans
description: >-
  Smallest AI offers usage-based, pay-as-you-go pricing for the Waves text-to-
  speech API billed per 1,000 characters by model (Lightning v3.1 and Lightning
  v3.1 Pro), with Pulse speech-to-text billed per minute. Voice agents (Atoms)
  and higher-scale needs are served through subscription plans and a custom
  Enterprise tier. New accounts receive a small amount of free test credit.
  Exact per-character rates, included quotas, and subscription tiers vary and are
  not fully reconciled in this artifact.
notes: >-
  Representative rates observed on the Smallest AI pricing page; confirm the
  current per-1,000-character TTS rates, per-minute STT rates, included quotas,
  and Atoms plan tiers on the pricing page during reconciliation.
sources:
- https://smallest.ai/pricing
- https://docs.smallest.ai/
- https://atoms-docs.smallest.ai/intro/admin/billing
plans:
- id: smallest-ai-free
  name: Free
  type: free
  description: >-
    Entry tier with a small amount of free test credit for evaluating the Waves
    TTS and Pulse STT APIs.
  entries:
  - label: Free Test Credit
    name: free_credit
    type: free
    metric: credit
    limit: -1
    timeFrame: month
    geo: global
    unit: 1
    price: free test credit on signup
    userMultiplied: false
  elements:
  - name: Text-to-Speech (Waves)
  - name: Speech-to-Text (Pulse)
- id: smallest-ai-pay-as-you-go
  name: Pay-as-you-go
  type: usage
  description: >-
    Character-metered TTS and minute-metered STT usage with no monthly minimum.
  entries:
  - label: Lightning v3.1 (TTS)
    name: tts_lightning_v31
    type: usage
    metric: characters
    limit: -1
    timeFrame: month
    geo: global
    unit: 1000
    price: ~$0.0145 per 1,000 characters
    userMultiplied: false
  - label: Lightning v3.1 Pro (TTS)
    name: tts_lightning_v31_pro
    type: usage
    metric: characters
    limit: -1
    timeFrame: month
    geo: global
    unit: 1000
    price: ~$0.0195 per 1,000 characters
    userMultiplied: false
  - label: Pulse STT (Pre-Recorded)
    name: stt_pulse_prerecorded
    type: usage
    metric: minutes
    limit: -1
    timeFrame: month
    geo: global
    unit: 1
    price: ~$0.003 per minute
    userMultiplied: false
  - label: Pulse STT (Realtime)
    name: stt_pulse_realtime
    type: usage
    metric: minutes
    limit: -1
    timeFrame: month
    geo: global
    unit: 1
    price: ~$0.004 per minute
    userMultiplied: false
  - label: Voice Cloning
    name: voice_cloning
    type: usage
    metric: voices
    limit: -1
    timeFrame: month
    geo: global
    unit: 1
    price: see pricing page (standard Lightning pool)
    userMultiplied: false
  elements:
  - name: Text-to-Speech (Waves)
  - name: Streaming / Realtime TTS
  - name: Voices / Cloning
  - name: Speech-to-Text (Pulse)
- id: smallest-ai-atoms
  name: Atoms (Voice Agents)
  type: subscription
  description: >-
    Subscription plans for building and running production voice agents on the
    Atoms platform, metered by usage/credits with paid tiers above the free tier.
  entries:
  - label: Atoms Usage
    name: atoms_usage
    type: usage
    metric: minutes
    limit: -1
    timeFrame: month
    geo: global
    unit: 1
    price: see Atoms billing page
    userMultiplied: false
  elements:
  - name: Atoms (Voice Agents)
- id: smallest-ai-enterprise
  name: Enterprise
  type: enterprise
  description: >-
    Built for teams running production workloads at scale: 99.99% uptime SLA,
    priority support, on-premise deployment, HIPAA compliance, SSO/RBAC/SOC2.
    Custom pricing - contact sales.
  entries:
  - label: Enterprise Agreement
    name: enterprise
    type: flat
    metric: contract
    limit: -1
    timeFrame: year
    geo: global
    unit: 1
    price: contact sales
    userMultiplied: false
  elements:
  - name: Custom Volume Pricing
  - name: On-Premise Deployment
  - name: Compliance (HIPAA, SOC2, SSO, RBAC)
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com