Head-to-Head Comparison

Sesame AI (CSM) vs OpenAI TTS

Compare Sesame AI (CSM) and OpenAI TTS side by side. See which text-to-speech platform is better for your needs in 2025.

S

Sesame AI (CSM)

4.4/5
startup

Conversational Speech Model for emotionally intelligent, human-like AI speech.

O

OpenAI TTS

4.5/5
premium

Natural text-to-speech from the creators of ChatGPT, with simple API integration.

Feature Comparison

FeatureSesame AI (CSM)OpenAI TTS
Rating
4.4/54.5/5
Starting Price
Free tier available$0.015
Languages
1+57+
Voice Cloning
API Available
Free Tier
Enterprise Plan

Pros & Cons

Sesame AI (CSM)

Pros

  • • Most natural conversational AI
  • • Emotional intelligence
  • • Open-source model available
  • • Novel approach to TTS
  • • Great for AI companions

Cons

  • • Very new technology
  • • Limited voices currently
  • • Higher compute requirements

OpenAI TTS

Pros

  • • Seamless OpenAI ecosystem integration
  • • Simple, predictable pricing
  • • High-quality natural voices
  • • Excellent documentation
  • • Reliable infrastructure

Cons

  • • Limited voice variety (6 voices)
  • • No voice cloning
  • • No free tier
  • • Less customization options

Other Comparisons

Sesame AI (CSM) vs Dia (Nari Labs)
Sesame AI (CSM) vs ElevenLabs
Sesame AI (CSM) vs Chatterbox (Resemble AI)

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