2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. MAI-Transcribe-2 (preview) leads on raw accuracy; Universal Streaming is fastest; MAI-Transcribe-2 (preview) covers the most languages; MAI-Transcribe-2 (preview) is cheapest.
Verdict · who wins what
Most accurate
MAI-Transcribe-2 (preview)
7.8% WER
Microsoft Azure
Fastest
Universal Streaming
0.1× realtime
AssemblyAI
Most languages
MAI-Transcribe-2 (preview)
59 languages
Microsoft Azure
Cheapest
MAI-Transcribe-2 (preview)
$0.0017/min
Microsoft Azure
Comparing
2 models · same benchmark
1
Universal Streaming
AssemblyAI
Purpose-built for real-time voice agents — ~300ms immutable transcripts
2
MAI-Transcribe-2 (preview)
Microsoft Azure
Microsoft MAI-Transcribe-2 — Microsoft AI's in-house transcription model, in public preview on Azure Speech. 60 languages with automatic language detection and mid-sentence code-switching, speaker diarization, word-level timestamps and custom vocabulary. Accepts WAV, MP3 and FLAC.
MAI-Transcribe-2 (preview)
field · 35 models
lower-left is better
general
—
legal
—
medical
—
noisy
—
technical
—
uk
—
us
—
946ms
Final drain
806ms
—
Real-time factor
1.03×
—
Flicker
3.9%
—
Cadence
2.7/s
—
$10.08
1,000 hours
$151.20
$100.80
Yes
Auto-detect language
No
Yes
Live / streaming
Yes
No
Custom vocabulary
No
Yes
Max file size
5 GB
250 MB
Max duration
10 h
2 h
Compliance
Is Universal Streaming or MAI-Transcribe-2 (preview) more accurate?
MAI-Transcribe-2 (preview) has a published benchmark at 7.8% word error rate. Universal Streaming has not been benchmarked yet.
Which is cheaper, Universal Streaming or MAI-Transcribe-2 (preview)?
MAI-Transcribe-2 (preview) is cheaper at $0.0017/min versus $0.0025/min for Universal Streaming.
Should you choose Universal Streaming or MAI-Transcribe-2 (preview)?
Choose Universal Streaming for speed; choose MAI-Transcribe-2 (preview) for accuracy, lower cost, and language coverage.
