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; Speechmatics Standard covers the most languages; Speechmatics Standard is cheapest.
Verdict · who wins what
Most accurate
GPT-4o Transcribe Diarize
14.6% WER
OpenAI
Fastest
GPT-4o Transcribe Diarize
0.2× realtime
OpenAI
Most languages
Speechmatics Standard
48 languages
Speechmatics
Cheapest
Speechmatics Standard
$0.0050/min
Speechmatics
Comparing
2 models · same benchmark
1
GPT-4o Transcribe Diarize
OpenAI
GPT-4o transcription with built-in speaker diarization
2
Speechmatics Standard
Speechmatics
Cost-effective model — fast turnaround, 55+ languages
GPT-4o Transcribe Diarize
Speechmatics Standard
field · 33 models
lower-left is better
general
legal
medical
noisy
technical
uk
us
Latency p99
18.1s
7.3s
$29.88
1,000 hours
$360.00
$298.80
Yes
Auto-detect language
Yes
Yes
Live / streaming
No
No
Custom vocabulary
No
Yes
Max file size
25 MB
1 GB
Max duration
No limit
No limit
Compliance
Is GPT-4o Transcribe Diarize or Speechmatics Standard more accurate?
GPT-4o Transcribe Diarize is more accurate, with a 14.6% word error rate versus 14.7% for Speechmatics Standard, on our standardized benchmark.
Which is cheaper, GPT-4o Transcribe Diarize or Speechmatics Standard?
Speechmatics Standard is cheaper at $0.0050/min versus $0.0060/min for GPT-4o Transcribe Diarize.
Should you choose GPT-4o Transcribe Diarize or Speechmatics Standard?
Choose GPT-4o Transcribe Diarize for accuracy and speed; choose Speechmatics Standard for lower cost and language coverage.
