Deepgram Flux TTS
English only (39 voices; American, British, Irish, Australian, Indian, Singaporean, Filipino accents); use Aura-2 for other languages. Self-hosted GA 2026-08-26; speed 0.5-1.5 and expressivity -2..2 controls. Launched alongside Deepgram passing $100M ARR.
- Input
- text
- Output
- audio
- License
- proprietary
- Pricing
- per 1k characters: $0.045 (per 1K characters pay-as-you-go ($0.0405 Growth); free until 2026-09-12, standard pricing from 2026-09-13) source
- Verified
- 2026-09-29
How to call it
| Provider | Model id | Endpoint / URL | Docs |
|---|---|---|---|
| Deepgram API (real-time) | flux-haley-en | wss://api.deepgram.com/v2/speak?model=flux-haley-en | docs |
| Deepgram API (batch) | flux-{voice}-en | https://api.deepgram.com/v2/speak | docs |
Notable capabilities (2)
- Conversation-native TTS: Keeps context and voice consistency across turns of a conversation instead of treating each sentence in isolation; turn lifecycle events; on Interrupt reports exactly what the user heard (`text_spoken`). source
- ~80 ms response, structured-content accuracy: Starts responding in as little as 80 ms under production load; tuned for account numbers, alphanumerics, drug names and money amounts. source
Voice-agent TTS served on /v2/speak (WebSocket for streaming LLM tokens, REST for batch).
Sources: https://developers.deepgram.com/docs/flux-tts/overview , https://developers.deepgram.com/docs/flux-tts/voices , https://deepgram.com/pricing , https://developers.deepgram.com/changelog
Timeline entry
- Deepgram launches Flux TTS and passes $100M ARR ★★★
On 2026-08-12 Deepgram launched Flux TTS, a "conversation-native" text-to-speech model for voice agents that keeps context and voice consistency across turns. It responds in as little as 80 ms and reports exactly what the user heard on interruption. It completes the Flux line after Flux STT (Oct…
Other Deepgram models
Deepgram Flux (conversational STT, English + Multilingual) · Deepgram Aura-2 · Deepgram Nova-3 (incl. Medical / Pharma)