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Nova-2 vs Soniox STT (Async)

2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. Soniox STT (Async) leads on raw accuracy; Soniox STT (Async) is fastest; Nova-2 covers the most languages; Soniox STT (Async) is cheapest.

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Verdict · who wins what

Most accurate

Soniox STT (Async)

8.7% WER

Soniox

Fastest

Soniox STT (Async)

0.1× realtime

Soniox

Most languages

Nova-2

33 languages

Deepgram

Cheapest

Soniox STT (Async)

$0.0017/min

Soniox

Comparing

2 models · same benchmark

1

Batch & Realtime

Nova-2

Deepgram

$0.0058/min
#18 · 76.2

Deepgram's Nova-2 speech recognition

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2

Batch

Soniox STT (Async)

Soniox

$0.0017/min
#1 · 73.7

Soniox async batch transcription — one multilingual model across 60+ languages with speaker diarization, per-word timestamps, and automatic language identification, at a low flat token-based rate.

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Overview

30-day benchmark average

Overall score

0–100

76.2

73.7

Accuracy rank

of 35

#18

#1

Word error rate

WER

16.5%

8.7%

Character error rate

CER

11.9%

6.2%

Match error rate

MER

15.4%

8.4%

Word info lost

WIL

21.0%

13.3%

Languages

33

25

Cost vs. accuracy

overall WER vs price

Nova-2

Soniox STT (Async)

field · 33 models

lower-left is better

Accuracy by category

WER · lower is better

code_switching

63.7%
16.0%

conversational

10.2%
12.6%

finance

11.3%
6.3%

general

13.1%
6.6%

legal

3.8%
3.5%

medical

7.3%
1.6%

noisy

31.3%
21.9%

technical

4.9%
4.9%

Accuracy by accent

WER · English

african

26.2%
12.3%

australian

15.4%
12.3%

indian

25.4%
19.1%

uk

11.9%
7.5%

us

9.4%
11.3%

Speed & latency

p50 → p99

Processing speed

× realtime

0.1×

0.1×

Latency p50

1.6s

6.2s

Latency p90

3.7s

6.2s

Latency p99

3.7s

6.2s

Realtime / streaming

Streaming benchmark averages

Realtime rank

of 17

#4

—

Realtime score

0–100

78.0

—

Time to first word

986ms

—

Final drain

192ms

—

Real-time factor

1.02×

—

Flicker

10.5%

—

Cadence

0.8/s

—

Reliability

Rolling 30 days

Uptime

83.33%

100.00%

Error rate

16.67%

0.00%

Pricing

billed per second

Rate

per minute

$0.0058

$0.0017

Billing granularity

per 1s

per 1s

1 hour of audio

$0.35

$0.10

100 hours

$34.92

$10.08

1,000 hours

$349.20

$100.80

Capabilities

Feature support

Speaker diarization

Yes

Yes

Word-level timestamps

Yes

Yes

Code-switching

Yes

No

Auto-detect language

Yes

Yes

Live / streaming

Yes

No

Custom vocabulary

Yes

No

Coverage & deployment

Languages · formats · regions

Languages

33

25

Mode

Batch & Realtime

Batch

Region

United States

United States

Audio formats

mp3
wav
flac
m4a
ogg
webm
mp3
wav
flac
m4a
ogg
webm
aac

Max file size

2 GB

No limit

Max duration

No limit

5 h

Compliance

HIPAA
SOC2
GDPR

—

Frequently asked questions

Is Nova-2 or Soniox STT (Async) more accurate?

Soniox STT (Async) is more accurate, with a 8.7% word error rate versus 16.5% for Nova-2, on our standardized benchmark.

Which is cheaper, Nova-2 or Soniox STT (Async)?

Soniox STT (Async) is cheaper at $0.0017/min versus $0.0058/min for Nova-2.

Should you choose Nova-2 or Soniox STT (Async)?

Choose Nova-2 for language coverage; choose Soniox STT (Async) for accuracy, speed, and lower cost.