2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. Gladia Solaria-3 leads on raw accuracy; Universal-3 Pro covers the most languages; Universal-3 Pro is cheapest.
Verdict · who wins what
Most accurate
Gladia Solaria-3
10.6% WER
Gladia
Fastest
—
—
Most languages
Universal-3 Pro
6 languages
AssemblyAI
Cheapest
Universal-3 Pro
$0.0035/min
AssemblyAI
Comparing
2 models · same benchmark
1
Universal-3 Pro
AssemblyAI
AssemblyAI's most powerful speech language model — up to 1000 keyterm phrases
2
Gladia Solaria-3
Gladia
Gladia Solaria-3 — EU-hosted batch speech-to-text tuned for the most accurate business audio across five core European languages (English, French, German, Spanish, Italian), with speaker diarization, custom vocabulary, and word-level timestamps.
30-day benchmark average
overall WER vs price
Gladia Solaria-3
Universal-3 Pro
field · 26 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
5.8s
7.7s
$20.88
$60.84
1,000 hours
$208.80
$608.40
No
Auto-detect language
Yes
Yes
Live / streaming
No
No
Custom vocabulary
Yes
Yes
Compliance
Is Universal-3 Pro or Gladia Solaria-3 more accurate?
Gladia Solaria-3 is more accurate, with a 10.6% word error rate versus 13.5% for Universal-3 Pro, on our standardized benchmark.
Which is cheaper, Universal-3 Pro or Gladia Solaria-3?
Universal-3 Pro is cheaper at $0.0035/min versus $0.0101/min for Gladia Solaria-3.
Should you choose Universal-3 Pro or Gladia Solaria-3?
Choose Universal-3 Pro for lower cost and language coverage; choose Gladia Solaria-3 for accuracy.
