How fast is Deepdub PhantomZ 4.0?

Coval measures a median time to first audio of 183.4 ms and a P95 of 430.0 ms for Deepdub PhantomZ 4.0, over 30 days from the US East in English (Visible delay tier).

How much does Deepdub PhantomZ 4.0 cost?

No benchmark prints a list price for Deepdub PhantomZ 4.0.

Which languages was Deepdub PhantomZ 4.0 tested in?

No source tested Deepdub PhantomZ 4.0 in a language other than English.

Deepdub · Proprietary · Read 2026-10-27

Deepdub PhantomZ 4.0: latency, voice quality, price and languages

Rank: 16 (tied) / 23
Speed tier: Visible delay
P95: 430.0 ms
Price / 1M chars: n/a

Deepdub PhantomZ 4.0 is a proprietary text-to-speech model from Deepdub. Coval measures a median of 183.4 ms and a P95 of 430.0 ms to first audio, which puts it in the Visible delay speed tier, rank 16 (tied) of 23 in the multilingual ranking. No source tested it in a language other than English.

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	Visible delay
Median time to first audio	183.4 ms
P90	349.7 ms
P95	430.0 ms
Mean	192.1 ms
Standard deviation	327.9 ms
Calls in the window	2,796
Cekura median, streamed text	n/a
Cekura median, full text	n/a

Voice quality (never added together)

Listener Elo (Artificial Analysis)	n/a
Customer-service Elo (Artificial Analysis)	n/a
Naturalness (Speko)	n/a
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)	2.3%

Price per 1 million characters

Range across sources	n/a
Artificial Analysis	n/a
Speko	n/a
Coval	n/a
Cekura	n/a

Coverage

Access	Proprietary
Streaming	Measured
Coval tags	emotion-control, multilingual, voice-cloning
Rated for	n/a
Languages tested	none beyond English

Not collected

Naturalness (Speko naturalness): not measured by Speko (reading of 2026-10-27)
Listener rating (Artificial Analysis Speech Arena Elo): not measured by Artificial Analysis (reading of 2026-10-27)
Numbers and dates (Speko pronunciation score): not measured by Speko (reading of 2026-10-27)
Price (Artificial Analysis price per 1M characters): not measured by Artificial Analysis (reading of 2026-10-27)

Sources

https://benchmarks-api-6wxgp27p2a-ue.a.run.app/v1/results/aggregates?benchmark=TTS&window=30d&include_series=false (read 2026-10-27)
Vendor site: https://deepdub.ai/

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Frequently asked questions

How fast is Deepdub PhantomZ 4.0?: Coval measures a median time to first audio of 183.4 ms and a P95 of 430.0 ms for Deepdub PhantomZ 4.0, over 30 days from the US East in English (Visible delay tier).
How much does Deepdub PhantomZ 4.0 cost?: No benchmark prints a list price for Deepdub PhantomZ 4.0.
Which languages was Deepdub PhantomZ 4.0 tested in?: No source tested Deepdub PhantomZ 4.0 in a language other than English.