Is Nova-2 or Nova-3 more accurate?

Nova-2 is more accurate, with a 31.5% word error rate versus 36.8% for Nova-3, on our standardized benchmark.

Which is cheaper, Nova-2 or Nova-3?

Nova-2 is cheaper at $0.0058/min versus $0.0077/min for Nova-3.

Should you choose Nova-2 or Nova-3?

Choose Nova-2 for accuracy, speed, and lower cost; choose Nova-3 for language coverage.

English

Overview

30-day benchmark average

Overall score

0–100

66.0

61.8

Ranker position

of 28

#22

#24

Word error rate

WER

31.5%

36.8%

Character error rate

CER

41.2%

48.9%

Match error rate

MER

22.2%

21.7%

Word info lost

WIL

27.6%

26.8%

Languages

33

47

Cost vs. accuracy

overall WER vs price

Nova-2

Nova-3

field · 26 models

lower-left is better

Accuracy by category

WER · lower is better

code_switching

64.5%

64.0%

conversational

11.9%

14.0%

finance

15.4%

13.6%

Accuracy by accent

WER · English

african

27.7%

27.7%

australian

17.2%

18.8%

indian

25.4%

27.0%

Speed & latency

p50 → p99

Processing speed

× realtime

0.1×

Latency p50

1.6s

1.3s

Latency p90

2.8s

1.6s

Realtime / streaming

Streaming benchmark averages

Realtime score

0–100

44.3

—

Time to first partial

1.1s

—

Final drain

287ms

—

Real-time factor

Reliability

Rolling 30 days

Uptime

100.00%

Error rate

0.00%

Pricing

billed per second

Rate

per minute

$0.0058

$0.0077

Billing granularity

per 1s

1 hour of audio

$0.35

$0.46

100 hours

Capabilities

Feature support

Speaker diarization

Yes

Word-level timestamps

Yes

Code-switching

Yes

Coverage & deployment

Languages · formats · regions

Languages

33

47

Mode

Batch & Realtime

Region

United States

Audio formats

Nova-2 vs Nova-3