Voice AI BenchmarksBy

PROVIDERLAST 30 DAYS

official resource

Rev AI voice AI models and benchmarks

Rev AI provides automated speech recognition APIs and creates and serves the Reverb streaming model.

Measured models
1
STT

Overview

Reverb supports custom vocabulary, and Rev AI offers an on-premises deployment option.

Every model below is measured daily on the same fixed inputs and ranked against the full field, never blended into a company score.

Model lineup

Speech-to-Text
Reverb

Speech-to-Text

Full STT dashboard

Ranked on Time to Final Segment against 24 measured models.

Time to Final Segmentms · lower is better · Rev AI models markedEvery measured STT model on Time to Final Segment, with Rev AI's models highlighted.
  1. #1STT RT v564 ms
  2. #2Parakeet TDT 0.6B v370 ms
  3. #3STT 183 ms
  4. #4Nova 399 ms
  5. #5Nova 2101 ms
  6. #6Ink 2108 ms
  7. #7Scribe v2 Realtime120 ms
leaders plus Rev AI models · 17 other models in the full table
Word Error Rate% · lower is better · Rev AI models markedEvery measured STT model on Word Error Rate, with Rev AI's models highlighted.
  1. #1Universal 3.5 Pro3.2%
  2. #2resonant-13.4%
  3. #3Chirp 34.1%
  4. #4Enhanced4.3%
  5. #5GPT-4o Transcribe4.7%
  6. #6Grok STT4.8%
  7. #7STT 14.8%
leaders plus Rev AI models · 21 other models in the full table
Time to First Tokenms · lower is better · Rev AI models markedEvery measured STT model on Time to First Token, with Rev AI's models highlighted.
  1. #1Universal 3.5 Pro1030 ms
  2. #2Flux1089 ms
  3. #3Flux Multilingual1175 ms
  4. #4Parakeet TDT 0.6B v31210 ms
  5. #5Whisper Large v31241 ms
  6. #6Nova 31434 ms
  7. #7Nova 21436 ms
leaders plus Rev AI models · 17 other models in the full table
Benchmarked models with their Time to Final Segment over the last 30 days.
ModelHostTTFSRank
ReverbRevno measurements this window

Limits of this comparison

Coval measures Reverb through Rev AI's managed streaming API.

  • The benchmark does not evaluate Rev's human transcription services or every asynchronous ASR mode.

Official resources

Same datasets, prompts and metric definitions for every model, measured by Coval’s open-source runner. Full methodology on the overview.

Evaluate your own voice agent

Use Coval to test your production configuration, prompts and calls—not only the public benchmark endpoints.

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