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Conversational AI & Chatbots

Dessa

Full-duplex speech conversation model trained natively on audio

FreeRuns in the cloudEditors pick

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Free

Free

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Web

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Conversational AI & Chatbots

71 tools

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Last updated

Oct 24

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Full-duplex real-time voice interactions

Engage in low-latency voice conversations that permit natural interruptions, concurrent speaking, and expressive feedback.

Pricing checked Oct 2026

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About Dessa

Dessa is an audio-native conversational foundation model developed by Block. Unlike traditional voice assistants that pipeline distinct Automatic Speech Recognition (ASR), Large Language Model (LLM), and Text-to-Speech (TTS) models together, Dessa processes and generates continuous audio tokens end-to-end.

By avoiding cascading pipeline overhead, Dessa delivers human-grade conversational latency, seamless mid-sentence interruptions, and fine-grained emotional prosody. Developers and researchers can explore full-duplex spoken dialogue that captures paralinguistic cues, vocal inflection, and dynamic pacing in real time.

  • Native audio-in, audio-out architecture avoids pipeline latency
  • Fluid mid-speech interruption handling and natural turn-taking
  • Rich vocal expression, emotional inflection, and natural acoustic response
  • Early research preview with limited public developer API access
  • Higher GPU compute requirements compared to text-only foundation models
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