Deepgram · Proprietary · Read 2026-10-27
Deepgram Aura 2: latency, voice quality, price and languages
- Rank
- not ranked
- Speed tier
- Visible delay
- P95
- 525.4 ms
- Price / 1M chars
- $30
Deepgram Aura 2 is a proprietary text-to-speech model from Deepgram. Coval measures a median of 263.0 ms and a P95 of 525.4 ms to first audio, which puts it in the Visible delay speed tier. It is not ranked because Coval does not tag it multilingual. Artificial Analysis or Speko tested it in 3 languages.
This summary is generated from the measures below; it is not a vendor description. Measures a source does not hold are shown as n/a and are never estimated.
Speed (Coval, 30 days, US East, English)
| Speed tier | Visible delay |
| Median time to first audio | 263.0 ms |
| P90 | 492.2 ms |
| P95 | 525.4 ms |
| Mean | 299.1 ms |
| Standard deviation | 143.8 ms |
| Calls in the window | 2,808 |
| Cekura median, streamed text | 126 ms |
| Cekura median, full text | 281 ms |
Voice quality (never added together)
| Listener Elo (Artificial Analysis) | n/a |
| Customer-service Elo (Artificial Analysis) | n/a |
| Naturalness (Speko) | 1,584 |
| Naturalness estimate (Cekura, 1 to 5) | 4.43 |
Accuracy
| Reading accuracy (Cekura) | 77.2% |
| Numbers (Cekura) | 71% |
| Codes (Cekura) | 87% |
| Context (Cekura) | 75% |
| Medical terms (Cekura) | 86% |
| Hard passages judged correct (Artificial Analysis) | n/a |
| Numbers and dates (Speko score) | 0.20 |
| Word error rate (Coval) | 1.9% |
Price per 1 million characters
| Range across sources | $30 |
| Artificial Analysis | n/a |
| Speko | $30 |
| Coval | $30 |
| Cekura | $30 |
Coverage
| Access | Proprietary |
| Streaming | Measured |
| Coval tags | n/a |
| Rated for | n/a |
| Languages tested | French, German, Spanish |
Not collected
- Listener rating (Artificial Analysis Speech Arena Elo): not measured by Artificial Analysis (reading of 2026-10-27)
- Price (Artificial Analysis price per 1M characters): not measured by Artificial Analysis (reading of 2026-10-27)
Sources
- https://benchmarks.cekura.ai/text-to-speech (read 2026-10-27)
- https://benchmarks-api-6wxgp27p2a-ue.a.run.app/v1/results/aggregates?benchmark=TTS&window=30d&include_series=false (read 2026-10-27)
- https://benchmarks.speko.ai/tts/ (read 2026-10-27)
- Vendor site: https://deepgram.com/
Keep exploring
Frequently asked questions
- How fast is Deepgram Aura 2?
- Coval measures a median time to first audio of 263.0 ms and a P95 of 525.4 ms for Deepgram Aura 2, over 30 days from the US East in English (Visible delay tier).
- How much does Deepgram Aura 2 cost?
- The benchmarks print a list price of $30 per million characters for Deepgram Aura 2.
- Which languages was Deepgram Aura 2 tested in?
- Artificial Analysis or Speko tested Deepgram Aura 2 in French, German, Spanish.