Estimated Belliste score, based on the available capabilities, quality, features and pricing information. It is an indicative profile estimate, not an independent benchmark.
How this profile estimate is calculated
Capabilities contribute 35%, quality wording 30%, listed features 20%, and pricing 15% when available. When capability fields are absent, specialization breadth supplies a 25% fallback. Missing categories are omitted and the remaining weights are rescaled. The estimate uses each model’s own published profile; it does not measure answer accuracy or replace a hands-on test.
OverviewCartesia SonicFish Audio S2 Pro
PriceFree $0/month · Paid from $5/monthFree tier available · API from $15/1M UTF-8 bytes
SpecializationTTS · Voice Cloning · Real-time Audio · Multilingual Speech · Voice AgentsTTS · Voice Cloning · Multilingual Speech · Emotion Control · Real-time Audio
QualityNatural, expressive speech optimized for real-time conversations.Highly expressive speech with fine-grained control over prosody, emotion, pacing and delivery.
FeaturesVoice Cloning · API · Streaming · Multilingual · Voice LibraryVoice Cloning · API · Streaming · Multilingual · Emotion Control
Capabilities
15 specifications +
SpecificationCartesia SonicFish Audio S2 Pro
Number of voicesNot specifiedNot specified
Text-to-SpeechYesYes
Voice cloningInstant and ProfessionalInstant voice cloning supported
DubbingNot specifiedSupported through Fish Audio workflows
Supported languages44 languages80+ languages
Voice conversionNot specifiedNot listed as a core S2 Pro capability
Real-time audioYesYes · streaming
Emotion controlEmotion and expressive controlsOpen-ended natural-language direction tags
Voice designNot specifiedAvailable through Fish Audio platform plans
Speech-to-SpeechNot specifiedNot listed as a core S2 Pro capability
Voice libraryAvailableAvailable through Fish Audio platform
Emotion ControlNot specified15,000+ open-ended direction tags
Real-time AudioYes · sub-90 ms model latencyNot specified
Voice CloningInstant and ProfessionalInstant voice cloning
Voice DesignNot specifiedAvailable on platform plans
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Uberduck
