MicrosoftAudio matchupSpeech output
MAI-Voice-2.1vs.MAI-Voice-2.1-Flash
Which model is better?
MAI-Voice-2.1 is slightly ahead in independent tests, but the lead is not certain.
Pick MAI-Voice-2.1 for
Pick MAI-Voice-2.1-Flash 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
MAI-Voice-2.1 slightly aheadMAI-Voice-2.1 is clearly ahead in 0 of 4 subtests and slightly in 2, MAI-Voice-2.1-Flash in none. 2 are level.
Cekura TTS hard-part accuracy: medical terms
as of October 19, 2026
Cekura TTS hard-part accuracy: numbers and shorthand
as of October 19, 2026
Cekura TTS hard-part accuracy: read from context
as of October 19, 2026
Show all 4 subtests
| Subtest | MAI-Voice-2.1 | MAI-Voice-2.1-Flash | Verdict |
|---|---|---|---|
| Cekura TTS hard-part accuracy: medical terms | 99.0 % | 92.0 % | MAI-Voice-2.1 slightly ahead |
| Cekura TTS hard-part accuracy: numbers and shorthand | 85.0 % | 79.0 % | MAI-Voice-2.1 slightly ahead |
| Cekura TTS hard-part accuracy: read from context | 73.0 % | 75.0 % | level |
| Cekura TTS hard-part accuracy: codes and addresses | 67.0 % | 67.0 % | level |
Source · latest October 19, 2026
Vendor figures
Figures from vendor reports that cover both models. They do not count toward the verdict.
Show 1 vendor figures
| Figure | Source | MAI-Voice-2.1 | MAI-Voice-2.1-Flash |
|---|---|---|---|
| Microsoft-published model-inference latency (lower is better) | Microsoft AI | 0.55 s | 0.05 s |
All data side by side
Prices are verbatim from the provider, because audio models bill per minute, character or token.
| MAI-Voice-2.1 | MAI-Voice-2.1-Flash | |
|---|---|---|
| Task | Speech output | Speech output |
| Developer | Microsoft | Microsoft |
| Status | Preview | Preview |
| Released | October 1, 2026 | October 1, 2026 |
| Weights | proprietary | proprietary |
| Runs locally | no | no |
| Price | $22 per 1M characters | $15 per 1M characters |
| Popularity (out of 100) | 1 | 0 |