Lifelike AI Text-to-Speech vs OpenAI Realtime API

Comparing the features of Lifelike AI Text-to-Speech to OpenAI Realtime API

Feature
Lifelike AI Text-to-Speech
OpenAI Realtime API

Capability Features

Character Count Display
Enterprise Privacy Commitment
Expanded Model Support Planned
Five New Voices
5
Function Calling
Generate Audio from Post ID
Human and Automated Safety Monitoring
Interruption Handling
Language/Country Support
English (US)English (Welsh)English (British)English (Indian)English (Australian)HindiChinese (Mandarin)DanishDutchFrenchFrench (Canadian)GermanIcelandicItalianJapaneseKoreanNorwegianPolishPortuguesePortuguese (Brazilian)RomanianRussianSpanish (Castilian)Spanish (US)SwedishTurkishWelsh
Lifelike Premium Voices
Multiple Accents
No Training on Data Without Permission
Number of Supported Voices
50
Playground Access
Prompt Caching Planned
Public Beta
Reference Client Available
Six Preset Voices
6
Speech-to-Speech
Streaming Audio Inputs/Outputs
Supports Text and Audio Inputs
TextAudio
Ultra Low Latency
Voice Options
JoannaMatthewSalliKimberlyKendraIvyJustinJoeyAnsonEmmaAmyBrianRaveenaAditiNicoleRussellZhiyuNajaMadsLotteRubenLéaCélineMathieuChantalVickiMarleneHansDóraKarlCarlaGiorgioMizukiTakumiSeoyeonLivEwaMajaJanJacekInêsCristianoVitóriaRicardoCarmenTatyanaMaximConchitaEnriquePenélopeMiguelAstridFilizGwyneth
Web App
WebSocket Connection

Integration Features

Agora Integration
Chat Completions API Integration
LiveKit Integration
OpenAI Node.js SDK Planned
OpenAI Python SDK Planned
Supported Providers
AWSGCPAzureIBMOpenAIEleven Labs
Supports GPT-4o
gpt-4o-realtime-preview
Twilio Voice API Integration

Limitation Features

AI Disclosure Requirement
API Access
Audio Only Modality (Initially)
File Format Support
Not specified
Lower Session Limits Tiers 1-4
Lower than 100
No Simultaneous Session Limit Anymore
Pricing Plans
Not specified
Simultaneous Sessions Limit Tier 5
100
Usage Policy Restriction
Voice Upload

Pricing Features

Approximate Audio Input Price
$0.06/minute
Approximate Audio Output Price
$0.24/minute
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