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GPT-4o Transcribe Diarize vs Whisper Large V3

2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. GPT-4o Transcribe Diarize leads on raw accuracy; Whisper Large V3 is fastest; Whisper Large V3 covers the most languages.

Open both in playground

Verdict · who wins what

Most accurate

GPT-4o Transcribe Diarize

14.6% WER

OpenAI

Fastest

Whisper Large V3

0.3× realtime

OpenAI

Most languages

Whisper Large V3

98 languages

OpenAI

Cheapest

—

—

Comparing

2 models · same benchmark

1

Batch

GPT-4o Transcribe Diarize

OpenAI

$0.0060/min
#12 · 50.7

GPT-4o transcription with built-in speaker diarization

Use This ModelDetails →

2

Batch

Whisper Large V3

OpenAI

$0.0060/min
#24 · 69.3

OpenAI's Whisper large-v3 model

Use This ModelDetails →

Overview

30-day benchmark average

Overall score

0–100

50.7

69.3

Accuracy rank

of 35

#12

#24

Word error rate

WER

14.6%

17.7%

Character error rate

CER

10.0%

13.1%

Match error rate

MER

13.5%

16.6%

Word info lost

WIL

19.9%

21.6%

Languages

12

98

Cost vs. accuracy

overall WER vs price

GPT-4o Transcribe Diarize

Whisper Large V3

field · 33 models

lower-left is better

Accuracy by category

WER · lower is better

code_switching

25.5%
62.7%

conversational

12.2%
11.2%

finance

6.3%
6.0%

general

14.5%
14.9%

legal

2.3%
2.4%

medical

1.9%
6.6%

noisy

32.5%
36.3%

technical

4.6%
6.5%

Accuracy by accent

WER · English

african

27.7%
24.6%

australian

29.2%
15.4%

indian

36.5%
19.1%

uk

13.4%
3.0%

us

18.9%
3.8%

Speed & latency

p50 → p99

Processing speed

× realtime

0.2×

0.3×

Latency p50

17.2s

3.5s

Latency p90

18.1s

4.3s

Latency p99

18.1s

4.3s

Realtime / streaming

Streaming benchmark averages

Realtime rank

—

—

Realtime score

0–100

—

—

Time to first word

—

—

Final drain

—

—

Real-time factor

—

—

Flicker

—

—

Cadence

—

—

Reliability

Rolling 30 days

Uptime

100.00%

100.00%

Error rate

0.00%

0.00%

Pricing

billed per second

Rate

per minute

$0.0060

$0.0060

Billing granularity

per 1s

per 1s

1 hour of audio

$0.36

$0.36

100 hours

$36.00

$36.00

1,000 hours

$360.00

$360.00

Capabilities

Feature support

Speaker diarization

Yes

No

Word-level timestamps

No

Yes

Code-switching

No

No

Auto-detect language

Yes

Yes

Live / streaming

No

No

Custom vocabulary

No

No

Coverage & deployment

Languages · formats · regions

Languages

12

98

Mode

Batch

Batch

Region

United States

United States

Audio formats

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

Max file size

25 MB

25 MB

Max duration

No limit

No limit

Compliance

SOC2
GDPR
SOC2
GDPR

Frequently asked questions

Is GPT-4o Transcribe Diarize or Whisper Large V3 more accurate?

GPT-4o Transcribe Diarize is more accurate, with a 14.6% word error rate versus 17.7% for Whisper Large V3, on our standardized benchmark.

Which is cheaper, GPT-4o Transcribe Diarize or Whisper Large V3?

GPT-4o Transcribe Diarize and Whisper Large V3 cost the same at $0.0060/min.

Should you choose GPT-4o Transcribe Diarize or Whisper Large V3?

Choose GPT-4o Transcribe Diarize for accuracy; choose Whisper Large V3 for speed and language coverage.