WhisperUI vs OpenAI Realtime API

Comparing the features of WhisperUI to OpenAI Realtime API

Feature
WhisperUI
OpenAI Realtime API

Capability Features

Batch File Upload
Desktop Version
Drag & Drop Upload
Edit Transcription
Enterprise Privacy Commitment
Expanded Model Support Planned
Export SRT Subtitles
Fast Transcription Speed
Most files within a few minutes
File Browse Upload
Five New Voices
5
Function Calling
High Accuracy Model
High (depends on audio quality)
Human and Automated Safety Monitoring
Interruption Handling
Multi-Language Transcription
No Training on Data Without Permission
Playground Access
Prompt Caching Planned
Public Beta
Reference Client Available
Six Preset Voices
6
Speech to Text
Speech-to-Speech
Streaming Audio Inputs/Outputs
Supported Language List
EnglishSpanishFrenchGermanChineseand more
Supports Text and Audio Inputs
TextAudio
Text to Speech
Translation to English
Ultra Low Latency
Unlimited Daily Uploads
WebSocket Connection

Integration Features

Agora Integration
Chat Completions API Integration
LiveKit Integration
OpenAI Node.js SDK Planned
OpenAI Python SDK Planned
Supported Audio Types
mp3mp4mpegmpgam4awavoggwebm
Supports GPT-4o
gpt-4o-realtime-preview
Twilio Voice API Integration

Limitation Features

AI Disclosure Requirement
Audio Only Modality (Initially)
File Size Limit
25
Lower Session Limits Tiers 1-4
Lower than 100
No Internal Billing
No Simultaneous Session Limit Anymore
OpenAI API Key Required
Simultaneous Sessions Limit Tier 5
100
Usage Policy Restriction
Web App Only

Other Features

API Key Stored Locally

Pricing Features

Approximate Audio Input Price
$0.06/minute
Approximate Audio Output Price
$0.24/minute
Direct API Usage Billing
OpenAI API usage billing
Has Free Tier
No Free Tier
Premium Plan Features
Upload multiple files at onceUnlimited daily files uploadTransform audio files into SRT files
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