ElevenLabsDeepgramAudio matchupSpeech output
Eleven Flash v2.5vs.Aura-2
Which model is better?
Aura-2 is slightly ahead in independent tests, but the lead is not certain.
Pick Eleven Flash v2.5 for
Pick Aura-2 for
Shared tests
Independent evaluators and leaderboards only, the newest shared snapshot per evaluator. With 95 % ranges a lead counts when they do not overlap; for hit rates, when it holds in a 95 % test. Without any uncertainty figure at most “slightly ahead”.
Cekura
Aura-2 slightly aheadAura-2 is clearly ahead in 0 of 8 subtests and slightly in 4, Eleven Flash v2.5 in 0 clearly and slightly in 2. 2 are level.
Cekura TTS hard-part accuracy: codes and addresses
as of October 19, 2026
Cekura TTS non-streaming latency
lower is better, as of October 19, 2026
Cekura TTS streaming latency median
lower is better, as of October 19, 2026
Show all 8 subtests
| Subtest | Eleven Flash v2.5 | Aura-2 | Verdict |
|---|---|---|---|
| Cekura TTS hard-part accuracy: codes and addresses | 55.0 % | 87.0 % | Aura-2 slightly ahead |
| Cekura TTS non-streaming latency (lower is better) | 182 ms | 281 ms | Eleven Flash v2.5 slightly ahead |
| Cekura TTS streaming latency median (lower is better) | 177 ms | 126 ms | Aura-2 slightly ahead |
| Cekura TTS hard-part accuracy: numbers and shorthand | 55.0 % | 71.0 % | Aura-2 slightly ahead |
| Cekura TTS ASR-based hard-part accuracy estimate | 64.4 % | 77.2 % | Aura-2 slightly ahead |
| Cekura TTS hard-part accuracy: medical terms | 100.0 % | 86.0 % | Eleven Flash v2.5 slightly ahead |
| Cekura UTMOS-predicted naturalness | 4 | 4 | level |
| Cekura TTS hard-part accuracy: read from context | 75.0 % | 75.0 % | level |
Source · latest October 19, 2026
All data side by side
Prices are verbatim from the provider, because audio models bill per minute, character or token.
| Eleven Flash v2.5 | Aura-2 | |
|---|---|---|
| Task | Speech output | Speech output |
| Developer | ElevenLabs | Deepgram |
| Status | Active | Active |
| Weights | proprietary | proprietary |
| Runs locally | no | no |
| Popularity (out of 100) | 22 | 44 |