DOSE Benchmark

Drug-name Oral Synthesis Evaluation

Can your voice model say retatrutide?

Nine voice models read the same clinical sentences. DOSE scores the drug names and lets you hear the difference.

Rohit Gangadhar Pari · August 2026

274drug names evaluated
2,466scored utterances
9TTS models tested

Rybelsus

rye · BEL · sus

We can start the patient on Rybelsus, an oral GLP-1 receptor agonist that helps stimulate glucose-dependent insulin secretion.

Pass threshold: 4/5Listen to compare

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Pronunciation accuracy

Nine models, ranked by drug-name pronunciation. A score of 4/5 or higher counts as a pass.

Filter by difficulty tier.

Ranked by overall accuracy

Synthio Labs leads by 10.9 points

Rank / Model

SHARE OF UTTERANCES SCORING 4/5 OR HIGHER

Pass rate

01

Synthio Labs

Synthio Labs RxPronounce

91.2%

02

Cartesia

sonic-3.6 (beta)

80.3%

03

ElevenLabs

eleven_v3

79.2%

04

OpenAI TTS

gpt-4o-mini-tts

77.4%

05

xAI

Grok TTS

77.0%

06

Google (Gemini TTS)

gemini-3.1-flash-tts-preview

74.5%

07

Deepgram

aura-2-thalia-en

72.6%

08

Cartesia

sonic-3.5

69.0%

09

Microsoft Azure

DragonHD Neural

63.1%

STRATIFIED · ERA

Newly approved drug names

Every model scores lower on newly approved names. The chart connects each model’s traditional and new-name pass rates.

87.0%

Synthio Labs on newly approved names

96.1%

on traditional names

+15.1 pts

lead on new names

Pass rate by drug era

NEWLY APPROVED

TRADITIONAL

50

60

70

80

90

100%

Synthio Labs

RxPronounce

Cartesia

sonic-3.6

OpenAI TTS

xAI

ElevenLabs

Cartesia

sonic-3.5

Deepgram

Google (Gemini TTS)

Microsoft Azure

STRATIFIED · NAME TYPE

Brand vs. generic names

Compare brand-name results with generic and INN drug names, including the gap in percentage points for each model.

87.8%

Synthio Labs on generic / INN names

94.4%

on brand names

+12.2 pts

lead on generic names

Pass rate by name type

GENERIC / INN

BRAND

50

60

70

80

90

100%

Synthio Labs

RxPronounce

Cartesia

sonic-3.6

ElevenLabs

xAI

OpenAI TTS

Google (Gemini TTS)

Deepgram

Cartesia

sonic-3.5

Microsoft Azure

Listen to the benchmark

Explore five sample drug names. Play each model’s recording or scrub its waveform. The full dataset is available on Hugging Face with access approval.

Request the full dataset on Hugging Face ↗

Drug name

Rybelsus

"We can start the patient on Rybelsus, an oral GLP-1 receptor agonist that helps stimulate glucose-dependent insulin secretion."

Reference pronunciation

rye

BEL

sus

Model

Pronunciation

Result

Synthio Labs

Synthio Labs RxPronounce

rye

BEL

sus

MATCH

Cartesia (Sonic-3.6)

sonic-3.6 (beta)

rye

BEL

sus

MATCH

Cartesia (Sonic-3.5)

sonic-3.5

rye

BEL

sus

MATCH

ElevenLabs

eleven_v3

rye

BEL

sus

MATCH

OpenAI TTS

gpt-4o-mini-tts

rye

BEL

sus

MATCH

Google (Gemini TTS)

gemini-3.1-flash-tts-preview

rye

BEL

sus

MATCH

Deepgram

aura-2-thalia-en

RYE

buhl

sus

STRESS + VOWEL

Microsoft Azure

DragonHD Neural

rye

BEL

sus

MATCH

xAI

Grok TTS

rye

BEL

sus

MATCH

Phonetic readings describe the generated audio. Match means a pronunciation score of at least 4/5.

Pronunciation errors

Open an example to hear the original recording alongside the other models.

Wegovy

Deepgram

HEARD

weh-THEH-vee

TRUTH

wee-GOH-vee

Replaces the middle “g” consonant with a “th” sound.

Xofluza

xAI

HEARD

EKS-OH-EFF-EL-YOO-ZED

TRUTH

zoh-FLEW-zuh

Spells the name letter by letter instead of pronouncing it.

Farxiga

ElevenLabs

HEARD

FARK-see-goh

TRUTH

far-SEE-guh

Moves stress to the first syllable and adds a “k” sound.

Clinical context

Each drug name appears in a clinical sentence. Open a sample to compare how the models read it.

Rybelsus

rye-BEL-sus

"We can start the patient on Rybelsus, an oral GLP-1 receptor agonist that helps stimulate glucose-dependent insulin secretion."

TRADITIONAL

HARD

Tryptyr

TRIP-teer

"We will prescribe Tryptyr drops twice daily because targeting TRPM8 thermoreceptors helps stimulate your eyes to produce natural tears."

NEW

MEDIUM

274 drug names

Counts on a shared scale: 0–274

By era

Traditional

128

New

146

By difficulty

Easy

63

Medium

102

Hard

109

1

real clinical sentence per drug

4/5

minimum score required to pass

53.3%

of names are newly approved

4

Azure synthesis failures

How DOSE is scored

01

Choose the sentences

274 drug names cover established brands, generic and INN names, and newly approved drugs. Each appears in one clinical sentence.

02

Reference pronunciations

Each drug’s reference comes from public pharmaceutical sources, including labels, manufacturer materials, and established medical references. It is then checked against spoken clinical usage so the target reflects the accepted pronunciation.

03

Generate the audio

All nine systems read the same clinical sentence for each drug, allowing their pronunciation of the name to be compared.

04

Score the pronunciation

Each system’s recording is scored 0–5 against the same reference by automated audio comparison. Several independent judgments are combined into one result; 4 or higher counts as a pass. Human reviewers are not in the scoring loop.

Cite the benchmark

BibTeX

COPY

@misc{synthio2026dosev1,

title= {DOSE v1: Drug-name Oral Synthesis Evaluation},

author= {Pari, Rohit Gangadhar and {Synthio Labs}},

year= {2026},

url= {https://www.synthiolabs.com/synthio-dose-benchmark}

}

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Synthio Labs · DOSE v1.0