SpeakLine vs OpenAI Realtime API

Comparing the features of SpeakLine to OpenAI Realtime API

Feature
SpeakLine
OpenAI Realtime API

Capability Features

Audio Speed Adjustment
Custom Voice Selection
Customizable Interface
Enterprise Privacy Commitment
Expanded Model Support Planned
Export Audio
Five New Voices
5
Function Calling
Human and Automated Safety Monitoring
Interruption Handling
Language Variety
Multiplatform Support
MaciPhoneiPadVision Pro
No Training on Data Without Permission
Personal Voice Support
Playground Access
Prompt Caching Planned
Public Beta
Reference Client Available
Six Preset Voices
6
Speech-to-Speech
SSML Support
Streaming Audio Inputs/Outputs
Supports Text and Audio Inputs
TextAudio
Text to Speech
Ultra Low Latency
Voice Pitch Adjustment
WebSocket Connection

Integration Features

Agora Integration
Chat Completions API Integration
iPad Compatibility
iPhone Compatibility
LiveKit Integration
macOS Compatibility
OpenAI Node.js SDK Planned
OpenAI Python SDK Planned
Supports GPT-4o
gpt-4o-realtime-preview
System Voice Integration
Twilio Voice API Integration
Vision Pro Compatibility

Limitation Features

AI Disclosure Requirement
Audio Only Modality (Initially)
Lower Session Limits Tiers 1-4
Lower than 100
No Simultaneous Session Limit Anymore
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
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 Information
Not specified
Pricing Text Input
$5/1M tokens
Pricing Text Output
$20/1M tokens