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Together AI releases Cartesia Sonic 3.5 for real-time TTS

By PulseAugur Editorial · [3 sources] ·

Together AI has announced the release of Cartesia Sonic 3.5, a new text-to-speech (TTS) model designed for real-time applications. The model boasts sub-90ms latency and supports 42 languages, with features for context-aware pronunciation and accurate transcript following. Developers can now access over 150 Cartesia Sonic 3.5 voices through Together AI's voice finder tool to compare and select voices before deployment. AI

IMPACT Enhances real-time TTS capabilities with low latency and broad language support, potentially improving voice agent interactions.

RANK_REASON Model release announcement from a frontier lab.

Read on X — Together (inference / OSS) →

AI-generated summary · Google Gemini · from 3 sources. How we write summaries →

Together AI releases Cartesia Sonic 3.5 for real-time TTS

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Frontier Release
Model release announcement from a frontier lab.
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3 independent sources
Multiple independent publishers reporting the same story raises confidence that it's real and newsworthy.
Topics
model release, product
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High
Clearly on-topic for AI-industry coverage.
Story freshness
103 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [3]

  1. X — Together (inference / OSS) TIER_1 English(EN) · togethercompute ·

    Try Sonic 3.5 in voice finder: https://t.co/5L8df8yzQM

    Try Sonic 3.5 in voice finder: https://t.co/5L8df8yzQM Model page: https://t.co/0cvwZAsguA

  2. X — Together (inference / OSS) TIER_1 English(EN) · togethercompute ·

    Sonic 3.5 is built for real-time TTS where latency, pronunciation, and delivery matter.

    Sonic 3.5 is built for real-time TTS where latency, pronunciation, and delivery matter. → Sub-90ms latency → Native support for 42 languages → Accurate transcript following for codes, IDs, and structured speech → Context-aware pronunciation for words like read, bass, and bow

  3. X — Together (inference / OSS) TIER_1 English(EN) · togethercompute ·

    Cartesia Sonic 3.5 is now available on Together AI.

    Cartesia Sonic 3.5 is now available on Together AI. We added 150+ @cartesia Sonic 3.5 voices to voice finder, so developers can listen, compare, and pick the right voice for real-time agents before deploying on Together AI. https://t.co/U3dk6hcMub

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