2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. GPT-4o Transcribe Diarize leads on raw accuracy; GPT-4o Transcribe Diarize is fastest; Ink-Whisper covers the most languages; Ink-Whisper is cheapest.
Verdict · who wins what
Most accurate
GPT-4o Transcribe Diarize
19.7% WER
OpenAI
Fastest
GPT-4o Transcribe Diarize
0.2× realtime
OpenAI
Most languages
Ink-Whisper
100 languages
Cartesia
Cheapest
Ink-Whisper
$0.0022/min
Cartesia
Comparing
2 models · same benchmark
1
Ink-Whisper
Cartesia
Whisper rearchitected for real-time and batch voice AI — fastest TTCT, 99-language coverage
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
Ink-Whisper
field · 23 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
947ms
18.1s
—
Flicker
0.0%
—
Cadence
0.0/s
—
$13.32
$36.00
1,000 hours
$133.20
$360.00
No
Auto-detect language
No
Yes
Live / streaming
Yes
No
Custom vocabulary
No
No
Compliance
—
Is Ink-Whisper or GPT-4o Transcribe Diarize more accurate?
GPT-4o Transcribe Diarize is more accurate, with a 19.7% word error rate versus 22.7% for Ink-Whisper, on our standardized benchmark.
Which is cheaper, Ink-Whisper or GPT-4o Transcribe Diarize?
Ink-Whisper is cheaper at $0.0022/min versus $0.0060/min for GPT-4o Transcribe Diarize.
Should you choose Ink-Whisper or GPT-4o Transcribe Diarize?
Choose Ink-Whisper for lower cost and language coverage; choose GPT-4o Transcribe Diarize for accuracy and speed.
