2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. Speechmatics Enhanced leads on raw accuracy; Speechmatics Enhanced is fastest; Speechmatics Enhanced covers the most languages; GPT-4o Transcribe Diarize is cheapest.
Verdict · who wins what
Most accurate
Speechmatics Enhanced
15.6% WER
Speechmatics
Fastest
Speechmatics Enhanced
0.3× realtime
Speechmatics
Most languages
Speechmatics Enhanced
47 languages
Speechmatics
Cheapest
GPT-4o Transcribe Diarize
$0.0060/min
Comparing
2 models · same benchmark
1
GPT-4o Transcribe Diarize
OpenAI
GPT-4o transcription with built-in speaker diarization
2
Speechmatics Enhanced
Speechmatics
Highest accuracy model — 55+ languages, best-in-class
30-day benchmark average
overall WER vs price
Speechmatics Enhanced
GPT-4o Transcribe Diarize
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
18.1s
8.7s
$36.00
$49.68
1,000 hours
$360.00
$496.80
Yes
Auto-detect language
Yes
Yes
Live / streaming
No
No
Custom vocabulary
No
Yes
Compliance
OpenAI
Is GPT-4o Transcribe Diarize or Speechmatics Enhanced more accurate?
Speechmatics Enhanced is more accurate, with a 15.6% word error rate versus 19.7% for GPT-4o Transcribe Diarize, on our standardized benchmark.
Which is cheaper, GPT-4o Transcribe Diarize or Speechmatics Enhanced?
GPT-4o Transcribe Diarize is cheaper at $0.0060/min versus $0.0083/min for Speechmatics Enhanced.
Should you choose GPT-4o Transcribe Diarize or Speechmatics Enhanced?
Choose GPT-4o Transcribe Diarize for lower cost; choose Speechmatics Enhanced for accuracy, speed, and language coverage.
