2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. Whisper Large V3 Turbo leads on raw accuracy; GPT-4o Transcribe Diarize is fastest; Whisper Large V3 Turbo is cheapest.
Verdict · who wins what
Most accurate
Whisper Large V3 Turbo
14.3% WER
Groq
Fastest
GPT-4o Transcribe Diarize
0.2× realtime
OpenAI
Most languages
—
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Cheapest
Whisper Large V3 Turbo
$0.0007/min
Groq
Comparing
2 models · same benchmark
1
Whisper Large V3 Turbo
Groq
OpenAI Whisper large-v3-turbo served on Groq's LPU hardware — very fast, very low cost batch transcription with word-level timestamps and automatic language detection.
2
GPT-4o Transcribe Diarize
OpenAI
GPT-4o transcription with built-in speaker diarization
30-day benchmark average
overall WER vs price
GPT-4o Transcribe Diarize
field · 27 models
lower-left is better
WER · lower is better
WER · English
p50 → p99
Streaming benchmark averages
Rolling 30 days
billed per second
Feature support
Languages · formats · regions
general
legal
medical
noisy
technical
uk
us
Latency p99
3.4s
18.1s
$3.96
$36.00
1,000 hours
$39.60
$360.00
No
Auto-detect language
Yes
Yes
Live / streaming
No
No
Custom vocabulary
No
No
Compliance
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Is Whisper Large V3 Turbo or GPT-4o Transcribe Diarize more accurate?
Whisper Large V3 Turbo is more accurate, with a 14.3% 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 $0.0007/min versus $0.0060/min for GPT-4o Transcribe Diarize.
Should you choose Whisper Large V3 Turbo or GPT-4o Transcribe Diarize?
Choose Whisper Large V3 Turbo for accuracy and lower cost; choose GPT-4o Transcribe Diarize for speed.
