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Whisper Large V3 Turbo vs GPT-4o Transcribe Diarize

2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. Whisper Large V3 Turbo leads on raw accuracy; Whisper Large V3 Turbo is fastest; Whisper Large V3 Turbo is cheapest.

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Verdict · who wins what

Most accurate

Whisper Large V3 Turbo

12.9% WER

Cloudflare

Fastest

Whisper Large V3 Turbo

1.0× realtime

Cloudflare

Most languages

—

—

Cheapest

Whisper Large V3 Turbo

$0.0005/min

Cloudflare

Comparing

2 models · same benchmark

1

Batch

Whisper Large V3 Turbo

Cloudflare

$0.0005/min
#10 · 76.7

OpenAI Whisper large-v3-turbo hosted by Cloudflare Workers AI, with word-level timestamps and automatic language detection.

Use This ModelDetails →

2

Batch

GPT-4o Transcribe Diarize

OpenAI

$0.0060/min
#14 · 50.7

GPT-4o transcription with built-in speaker diarization

Use This ModelDetails →

Overview

30-day benchmark average

Overall score

0–100

76.7

50.7

Accuracy rank

of 37

#10

#14

Word error rate

WER

12.9%

14.6%

Character error rate

CER

9.2%

10.0%

Match error rate

MER

11.9%

13.5%

Word info lost

WIL

16.3%

19.9%

Languages

12

12

Cost vs. accuracy

overall WER vs price

GPT-4o Transcribe Diarize

Whisper Large V3 Turbo

field · 35 models

lower-left is better

Accuracy by category

WER · lower is better

code_switching

23.2%
25.5%

conversational

10.0%
12.2%

finance

6.7%
6.3%

general

10.7%
14.5%

legal

2.8%
2.3%

medical

2.1%
1.9%

noisy

36.3%
32.5%

technical

5.2%
4.6%

Accuracy by accent

WER · English

african

24.6%
27.7%

australian

36.9%
29.2%

indian

23.8%
36.5%

uk

6.0%
13.4%

us

9.4%
18.9%

Speed & latency

p50 → p99

Processing speed

× realtime

1.0×

0.2×

Latency p50

5.3s

17.2s

Latency p90

5.3s

18.1s

Latency p99

5.3s

18.1s

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%

0.00%

Error rate

0.00%

100.00%

Pricing

billed per second

Rate

per minute

$0.0005

$0.0060

Billing granularity

per 1s

per 1s

1 hour of audio

$0.03

$0.36

100 hours

$3.24

$36.00

1,000 hours

$32.40

$360.00

Capabilities

Feature support

Speaker diarization

No

Yes

Word-level timestamps

Yes

No

Code-switching

No

No

Auto-detect language

Yes

Yes

Live / streaming

No

No

Custom vocabulary

No

No

Coverage & deployment

Languages · formats · regions

Languages

12

12

Mode

Batch

Batch

Region

Global

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

Frequently asked questions

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

Whisper Large V3 Turbo is more accurate, with a 12.9% word error rate versus 14.6% for GPT-4o Transcribe Diarize, on our standardized benchmark.

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

Whisper Large V3 Turbo is cheaper at $0.0005/min versus $0.0060/min for GPT-4o Transcribe Diarize.

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

Whisper Large V3 Turbo is the stronger choice overall, leading on accuracy, speed, and lower cost.