AsyncAI Voice API vs OpenAI Realtime API

Comparing the features of AsyncAI Voice API to OpenAI Realtime API

Feature
AsyncAI Voice API
OpenAI Realtime API

Capability Features

Advanced Speech Features
emotional inflectionrhythm controlmultilingual support
API Access
API Sample Rate Support
44100
API Streaming
Audio AI Features
end-to-end editingnoise cancellationAI-powered refinement
Comprehensive Documentation
Creative Suite Tools
PodcastingVideo AIAudio AIVoice AI
Enterprise Privacy Commitment
Expanded Model Support Planned
Five New Voices
5
Function Calling
Human and Automated Safety Monitoring
Infinite Voice Styles
Infinite
Interruption Handling
Lifelike Text-to-Speech
Low Latency
No Training on Data Without Permission
Playground Access
Podcasting Features
audio enhancementnoise reductionvoice conversion
Prompt Caching Planned
Public Beta
Quick Implementation
<10 minutes
Reference Client Available
Six Preset Voices
6
Speech-to-Speech
Streaming Audio Inputs/Outputs
Supported Language List
20+
Supported Use Cases
Customer ServiceGame DevelopmentDigital MarketingDigital PublishingPatient CommunicationConversion OptimizationConversational AI / AgentsGlobal ReachDigital Humans / AI AvatarsSupply ChainTalent AcquisitionInclusive Design
Supports Text and Audio Inputs
TextAudio
Ultra Low Latency
Uptime and Reliability
Video AI Features
intelligent video editingautomatic captioningvisual enhancement
Voice AI Tools
text-to-speechvoice cloning
Voice Cloning
Voice Cloning Sample Duration
3
Voice Library
1000
Voice Model Version
asyncFlow v1.0
Voice Output Emotional Styles
ExcitedNeutralWarm
WebSocket Connection

Integration Features

Agora Integration
API Implementation Languages
PythonJavaScriptcURL
API Output File Formats
WAVraw PCM (pcm_f32le)
Chat Completions API Integration
LiveKit Integration
OpenAI Node.js SDK Planned
OpenAI Python SDK Planned
Platform Integrations
APIPythonJavaScriptcURL
Supports GPT-4o
gpt-4o-realtime-preview
Twilio Voice API Integration

Limitation Features

AI Disclosure Requirement
API Key Integration
Audio Only Modality (Initially)
Lower Session Limits Tiers 1-4
Lower than 100
No Pricing Information
No Simultaneous Session Limit Anymore
No Usage Quotas Stated
Simultaneous Sessions Limit Tier 5
100
Usage Policy Restriction

Pricing Features

Approximate Audio Input Price
$0.06/minute
Approximate Audio Output Price
$0.24/minute
Developer-friendly Pricing
Developer-friendly
Free Tier
No Free Tier
Pricing Audio Input
$100/1M tokens
Pricing Audio Output
$200/1M tokens
Pricing Cached Audio Input
$20/1M tokens
Pricing Cached Text Input
$2.50/1M tokens
Pricing Text Input
$5/1M tokens
Pricing Text Output
$20/1M tokens