How fast is Cartesia Sonic 3?

Coval does not measure Cartesia Sonic 3, so no latency is published here.

How much does Cartesia Sonic 3 cost?

The benchmarks print a list price of $49 to $50 per million characters for Cartesia Sonic 3.

Which languages was Cartesia Sonic 3 tested in?

Artificial Analysis or Speko tested Cartesia Sonic 3 in Arabic, Chinese, French, German, Hindi, Japanese, Portuguese, Spanish, Vietnamese.

Cartesia · Proprietary · Read 2026-10-27

Cartesia Sonic 3: latency, voice quality, price and languages

Rank: not ranked
Speed tier: n/a
P95: n/a
Price / 1M chars: $49 to $50

Cartesia Sonic 3 is a proprietary text-to-speech model from Cartesia. Coval does not measure its latency, so it has no speed tier and no rank. Artificial Analysis or Speko tested it in 9 languages.

This summary is generated from the measures below; it is not a vendor description. Measures a source does not hold are shown as n/a and are never estimated.

Speed (Coval, 30 days, US East, English)

Speed tier	n/a
Median time to first audio	n/a
P90	n/a
P95	n/a
Mean	n/a
Standard deviation	n/a
Calls in the window	n/a
Cekura median, streamed text	n/a
Cekura median, full text	n/a

Voice quality (never added together)

Listener Elo (Artificial Analysis)	1,054 ±11
Customer-service Elo (Artificial Analysis)	1,104 ±26
Naturalness (Speko)	1,551
Naturalness estimate (Cekura, 1 to 5)	n/a

Accuracy

Reading accuracy (Cekura)	n/a
Numbers (Cekura)	n/a
Codes (Cekura)	n/a
Context (Cekura)	n/a
Medical terms (Cekura)	n/a
Hard passages judged correct (Artificial Analysis)	n/a
Numbers and dates (Speko score)	n/a
Word error rate (Coval)	n/a

Price per 1 million characters

Range across sources	$49 to $50
Artificial Analysis	$49
Speko	$50
Coval	n/a
Cekura	n/a

Coverage

Access	Proprietary
Streaming	Vendor documentation
Coval tags	n/a
Rated for	Knowledge sharing, Assistants, Entertainment, Customer service
Languages tested	Arabic, Chinese, French, German, Hindi, Japanese, Portuguese, Spanish, Vietnamese

Not collected

Speed (Coval median time to first audio): not measured by Coval (reading of 2026-10-27, 30-day window)
Speed (Coval P95 time to first audio): not measured by Coval (reading of 2026-10-27, 30-day window)
Numbers and dates (Speko pronunciation score): listed by Speko without this value (reading of 2026-10-27)

Sources

https://artificialanalysis.ai/text-to-speech/leaderboard/provider-voice (read 2026-10-27)
https://benchmarks.speko.ai/tts/ (read 2026-10-27)
Vendor site: https://www.cartesia.ai/

Keep exploring

Frequently asked questions

How fast is Cartesia Sonic 3?: Coval does not measure Cartesia Sonic 3, so no latency is published here.
How much does Cartesia Sonic 3 cost?: The benchmarks print a list price of $49 to $50 per million characters for Cartesia Sonic 3.
Which languages was Cartesia Sonic 3 tested in?: Artificial Analysis or Speko tested Cartesia Sonic 3 in Arabic, Chinese, French, German, Hindi, Japanese, Portuguese, Spanish, Vietnamese.