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| 2 models | assemblyaiAssemblyAI: Universal-3.5 ProRemove × | nvidiaNemotron-3-DiarizationRemove × |
|---|---|---|
| What’s different | Universal-3.5 Pro is AssemblyAI's speech-to-text model served through its Sync API, returning a complete transcript with word-level timestamps in a single synchronous response for audio clips up to 120… | Nemotron 3 Diarization is an open-weight streaming Sortformer model, engineered for low-latency speaker diarization across up to 8 speakers, ordered by arrival time. It powers meeting transcription, call… |
| Date | Sep 22, 2026Listed | Sep 25, 2026Listed |
API prices USD · provider configuration shown below | ||
| Listed rate | $83.3333 in / $0.00 out/ 1M tokensOpenRouter · all routes ↗ | $0.00001/ secondDeepInfra · all routes ↗Input audio second |
| Provider endpoints | 1 endpoint → | 1 endpoint → |
Benchmarks Each result retains its evaluation configuration | ||
| AMI-Cleaned WER ↗English short-form; normalization unversioned | 10.63% WER ↗assemblyai/universal-3-5-proLeaderboard entry | Not reported |
| Earnings22-Cleaned-AA-chunked WER ↗English short-form; normalization unversioned | 6.05% WER ↗assemblyai/universal-3-5-proLeaderboard entry | Not reported |
| Gigaspeech-Cleaned WER ↗English short-form; normalization unversioned | 7.62% WER ↗assemblyai/universal-3-5-proLeaderboard entry | Not reported |
| LS Clean WER ↗English short-form; normalization unversioned | 1.1% WER ↗assemblyai/universal-3-5-proLeaderboard entry | Not reported |
| LS Other WER ↗English short-form; normalization unversioned | 2.11% WER ↗assemblyai/universal-3-5-proLeaderboard entry | Not reported |
| SPGISpeech WER ↗English short-form; normalization unversioned | 1.81% WER ↗assemblyai/universal-3-5-proLeaderboard entry | Not reported |
| URGENT2024 WER ↗English short-form; normalization unversioned | 9.08% WER ↗assemblyai/universal-3-5-proLeaderboard entry | Not reported |
| Voice Arena Monsoon WER ↗English short-form; normalization unversioned | 3.49% WER ↗assemblyai/universal-3-5-proLeaderboard entry | Not reported |
| Voxpopuli-AA-Cleaned WER ↗English short-form; normalization unversioned | 1.92% WER ↗assemblyai/universal-3-5-proLeaderboard entry | Not reported |
Specifications | ||
| Context window | — | — |
| Max output | — | — |
| Parameters | — | — |
| Audio input | Supported | Not reported |
| Transcription | Supported | Not reported |