Every model on the SLNG platform works through the Unified API. Some run on SLNG infrastructure (SLNG-hosted), others are proxied to the provider’s own API.Documentation Index
Fetch the complete documentation index at: https://docs.slng.ai/llms.txt
Use this file to discover all available pages before exploring further.
SLNG-hosted models use the
slng/ prefix in the model identifier. They are optimized for low latency in specific regions and billed through your SLNG account with no separate provider account needed.Text-to-Speech
Rime Arcana v3
Rime Arcana v3
Provider: Rime | Hosting: SLNG | Languages: English, HindiNatural prosody with improved voice quality over v1. French and Spanish support planned.
Best for: conversational agents, high-quality voice output.
| Identifier | Description |
|---|---|
slng/rime/arcana:3-en | English |
slng/rime/arcana:3-hi | Hindi |
Rime Arcana v1
Rime Arcana v1
Provider: Rime | Hosting: SLNG | Languages: Arabic, English, French, German, Spanish150+ voices across 5 languages. Uses unversioned identifiers (
Best for: broad language coverage, high-volume production.
arcana: instead of arcana:3-).| Identifier | Description |
|---|---|
slng/rime/arcana:en | English |
slng/rime/arcana:es | Spanish |
slng/rime/arcana:fr | French |
slng/rime/arcana:de | German |
slng/rime/arcana:ar | Arabic |
Deepgram Aura 2
Deepgram Aura 2
Provider: Deepgram | Hosting: SLNG + Deepgram | Languages: English, SpanishAvailable both SLNG-hosted (low latency) and proxied to Deepgram (more languages). The
Best for: low-latency voice apps, multilingual IVR.
model field is required to pick a voice; there is no default.| Identifier | Description |
|---|---|
slng/deepgram/aura:2-en | SLNG-hosted (English) |
slng/deepgram/aura:2-es | SLNG-hosted (Spanish) |
deepgram/aura:2 | Proxied to Deepgram (7 languages) |
Cartesia Sonic 3
Cartesia Sonic 3
Provider: Cartesia | Hosting: Cartesia | Languages: 40+Streaming TTS with controls for speed, volume, and emotion.
Best for: real-time voice agents, expressive multilingual output.
| Identifier | Description |
|---|---|
cartesia/sonic:3 | Proxied to Cartesia |
Murf Falcon
Murf Falcon
Provider: Murf | Hosting: Murf | Languages: 16 localesReal-time multilingual TTS over WebSocket with multiple encodings and sample rates.
Best for: low-cost voice agents, IVR, assistants.
| Identifier | Description |
|---|---|
murf/murftts:falcon | Proxied to Murf |
KugelAudio Kugel
KugelAudio Kugel
Provider: KugelAudio | Hosting: KugelAudio | Languages: 2687 voices with expressiveness control across 26 languages. Three variants trade off latency and quality.
Best for: multilingual voice agents, content creation.
| Identifier | Description |
|---|---|
kugelaudio/kugel:1-turbo | Lowest latency |
kugelaudio/kugel:1 | Higher quality, higher latency |
kugelaudio/kugel:2 | Latest version, EU region |
Soniox TTS v1
Soniox TTS v1
Provider: Soniox | Hosting: Soniox | Languages: 50+Streaming and one-shot synthesis across 50+ languages.
Best for: multilingual streaming, long-form synthesis.
| Identifier | Description |
|---|---|
soniox/tts-rt:v1 | Proxied to Soniox |
Sarvam Bulbul v3
Sarvam Bulbul v3
Provider: Sarvam AI | Hosting: Sarvam AI | Languages: 11 Indian languagesPurpose-built for Indian languages with 30+ speaker voices.
Best for: India-focused voice apps, regional language support.
| Identifier | Description |
|---|---|
sarvam/bulbul:v3 | Proxied to Sarvam AI |
Speech-to-Text
Deepgram Nova 3
Deepgram Nova 3
Provider: Deepgram | Hosting: SLNG + Deepgram | Languages: English, Spanish, HindiAvailable both SLNG-hosted and proxied.
Best for: low-latency streaming, voice agents.
| Identifier | Description |
|---|---|
slng/deepgram/nova:3-en | SLNG-hosted (English) |
slng/deepgram/nova:3-es | SLNG-hosted (Spanish) |
slng/deepgram/nova:3-hi | SLNG-hosted (Hindi) |
slng/deepgram/nova:3-multi | SLNG-hosted (auto-detect) |
deepgram/nova:3 | Proxied to Deepgram (17 languages) |
deepgram/nova:3-medical | Proxied to Deepgram (medical English) |
Deepgram Nova 2
Deepgram Nova 2
Provider: Deepgram | Hosting: Deepgram | Languages: 36Proven model with VAD, diarization, and smart formatting.
Best for: production transcription, multi-speaker audio.
| Identifier | Description |
|---|---|
deepgram/nova:2 | Proxied to Deepgram |
Soniox Speech AI v4
Soniox Speech AI v4
Provider: Soniox | Hosting: Soniox | Languages: 60+Real-time STT with speaker diarization, automatic language identification, and configurable endpoint detection. Returns native Soniox token frames.
Best for: multilingual streaming, multi-speaker conversations.
| Identifier | Description |
|---|---|
soniox/speech-ai:rt-v4 | Proxied to Soniox |
Reson8 STT v1
Reson8 STT v1
Provider: Reson8 | Hosting: Reson8 | Languages: 9 EuropeanReal-time STT with word-level timestamps, confidence scores, and partial results. Dutch, English, French, German, Italian, Polish, Portuguese, Spanish, Swedish.
Best for: European-language voice agents, low-latency transcription.
| Identifier | Description |
|---|---|
reson8/reson8stt:v1 | Proxied to Reson8 |
Sarvam Saaras v3
Sarvam Saaras v3
Provider: Sarvam AI | Hosting: Sarvam AI | Languages: 24Speech recognition for 24 Indian and European languages with code-mixing support. HTTP-only; not available over WebSocket.
Best for: India-focused batch transcription, code-switched audio.
| Identifier | Description |
|---|---|
sarvam/saaras:v3 | Proxied to Sarvam AI |
Choosing a model
| Use case | Recommended STT | Recommended TTS |
|---|---|---|
| Voice agents (low latency) | slng/deepgram/nova:3-en | slng/rime/arcana:3-en |
| Multilingual transcription | deepgram/nova:3 | cartesia/sonic:3 |
| Indian languages | slng/deepgram/nova:3-hi | sarvam/bulbul:v3 |
| Batch transcription | deepgram/nova:3 | — |
| Medical transcription | deepgram/nova:3-medical | — |