OpenAI Realtime API vs SFX Engine

Comparing the features of OpenAI Realtime API to SFX Engine

Feature
OpenAI Realtime API
SFX Engine

Capability Features

Background Music
Commercial Use Rights
Enterprise Privacy Commitment
Expanded Model Support Planned
Fine-Tuned Generation
Five New Voices
5
Function Calling
Human and Automated Safety Monitoring
Infinite Sound Variations
Interruption Handling
No Training on Data Without Permission
Playground Access
Priority Feature Requests
Priority Support
Creator/Pro: Priority, Starter: Priority email, Basic: Basic community support
Prompt Caching Planned
Public Beta
Reference Client Available
Royalty-Free Sound Effects
Six Preset Voices
6
Sound Effect Generator
Speech-to-Speech
Streaming Audio Inputs/Outputs
Studio Quality Output
Supported Use Cases
MoviesSongsVideosPodcastsGamesAppsSocial mediaAds
Supports Text and Audio Inputs
TextAudio
Ultra Low Latency
WebSocket Connection

Integration Features

Agora Integration
API Access
Starter: API access, Creator/Pro: Full API access
Chat Completions API Integration
File Formats Supported
Not specified
LiveKit Integration
OpenAI Node.js SDK Planned
OpenAI Python SDK Planned
Platform Integration
Not specified
Supports GPT-4o
gpt-4o-realtime-preview
Twilio Voice API Integration

Limitation Features

AI Disclosure Requirement
Audio Only Modality (Initially)
Free Plan Limits
3 credits/month, basic support
Lower Session Limits Tiers 1-4
Lower than 100
Maximum Credits per Plan
Basic: 3/monthStarter: 600/yearCreator: 4800/yearPro: 18000/year
No Simultaneous Session Limit Anymore
Simultaneous Sessions Limit Tier 5
100
Usage Policy Restriction

Other Features

Supported User Roles
Audio producersVideo editorsGame developers

Pricing Features

Approximate Audio Input Price
$0.06/minute
Approximate Audio Output Price
$0.24/minute
Basic Plan Credits
3
Creator Plan Credits
4800
CreatorPlan Monthly Price
$40/month
Credit-Based Usage
Custom Plans
Free Tier
No Credit Card Required
No Free Tier
No Hidden Fees
No Subscription
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
Pro Plan Credits
18000
Pro Plan Monthly Price
$72/month
Promo Code Discount
35% off with code FIRST35
Starter Plan Credits
600
Starter Plan Price
$8/month