Cartesia

Cartesia Sonic

real-time
website
Sources

speech.dev has not published an operational assessment for this entry yet. Facts below are source-linked where available.

Overview
Publisher
Cartesia
Lab
cartesia
Last updated
2026-05-23
Modality

en-us, fr-fr, de-de, es-es, pt-br, zh-cn, ja-jp, hi-in, ko-kr

Pricing

Billing model
Per second
Rate
$0.0004 per second
Notes
15 credits/sec on Sonic models. LiveKit Inference (docs + pricing): Sonic 2: $50/1M chars; Sonic 3: $50/1M chars; Sonic 3 Latest: $50/1M chars; Sonic 3 (2025-10-27): $50/1M chars; Sonic 3 (2026-01-12): $50/1M chars; Sonic 3 Latest: $50/1M chars; Sonic Latest: $50/1M chars; Sonic 3 (2025-10-27): $50/1M chars; Sonic 3 (2026-01-12): $50/1M chars. https://docs.livekit.io/agents/models/inference/

Last verified May 23, 2026

Benchmarks

Community Elo (blind votes)

TTS Arena

Listed as: Cartesia Sonic 2

Rank
#13
Elo
1513
Win rate
53%
Votes
305

Arena lists Cartesia Sonic 2; mapped to closest Sonic family entry.

Verified 2026-05-23

Speech Arena quality (AA)

Artificial Analysis TTS

Listed as: Sonic English (Oct 2024)

Indexed on Artificial Analysis text-to-speech comparison; quality Elo from Speech Arena.

Verified 2026-05-23

Technical

Streaming
Supported
Hosting
saas-vendor-cloud
Self-hostable
No

API access

WSSHTTPS streaming

API endpoints

wsshttps

SDK languages

python, typescript

Regions (vendor buckets)

Macro areas as published by the vendor (often broad; not a country list).

North AmericaEurope

Compliance (vendor-published)

GDPR DPAHIPAA BAAPCI DSSSOC 2 Type II
LiveKit Inference
Listed on LiveKit Agents inference catalog · verified 2026-05-23
Listed modelBuild & ShipScale
Sonic 2$50.0000$37.5000
Sonic 3$50.0000$37.5000
Sonic 3 Latest$50.0000$37.5000
Sonic 3 (2025-10-27)$50.0000$37.5000
Sonic 3 (2026-01-12)$50.0000$37.5000
Sonic 3 Latest$50.0000$37.5000
Sonic Latest$50.0000$37.5000
Sonic 3 (2025-10-27)$50.0000$37.5000
Sonic 3 (2026-01-12)$50.0000$37.5000

LiveKit inference pricing (per million characters)

Suggest an update
Facts-layer corrections only — source URLs required. Opens a GitHub issue; a maintainer runs the content agent after triage. Not for operational notes.

Entry id

cartesia-sonic

Page: /models/cartesia-sonic/

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