The Next Era for Generative Speech

MARS8: The Multilingual Text-to-Speech Model Built for Production

MARS8 is a family of production-grade text-to-speech models built so every use case, language, and voice profile gets the same rock-solid reliability when millions are listening.

Build with MARS8View benchmarks
Launching natively on all top compute platforms
Google
Fal.ai
AWS
Hugging Face
Modal
Replicate
Baseten
Simplismart
Hathora
Parasail
Cerebrium
Google
Fal.ai
AWS
Hugging Face
Modal
Replicate
Baseten
Simplismart
Hathora
Parasail
Cerebrium
The World's First Family of TTS Models

The MARS8 family - specialized models for each use-case

Read our full research blog post →
MARS8 FAMILY
MARS8-Flash
MARS8.1-Pro
MARS8-Instruct
MARS8-Nano

MARS8-Flash

Low-latency multilingual TTS for Conversational AI Agents.

Parameters: 600M
Try it on our API
USE CASES
Real-time voice agents
Contact centers
Live conversational AI
NEWMARS8.1 is now in beta. Faster and more expressive, same API.
Benchmark Results

Redefining the new baseline in TTS

Run the benchmarks yourself →
MARS8-Pro
CAMB.AI
MARS8-Flash
CAMB.AI
Sonic-3
Cartesia
Speech-2.6-hd
Minimax
Multilingual_v2
ElevenLabs
Multilingual_v3
ElevenLabs
PQ ↑
Predicted mean opinion score (1–10) from Meta's Audiobox-Aesthetics model; higher indicates better production quality.
7.4498
7.4523
6.9471
6.9468
7.4516
7.1934
WavLM SV cosine similarity ↑
Mean cosine similarity between generated and reference audio using the wavlm-base-sv embedding model.
0.8676
0.8666
0.8420
0.8666
0.8109
0.8253
CAM++ cosine similarity ↑
Mean cosine similarity between generated and reference audio using the CAM++ embedding model.
0.7097
0.7066
0.5134
0.5878
0.3912
0.336
CE ↑
Predicted mean opinion score (1–10) from Meta's Audiobox-Aesthetics model; higher reflects greater content enjoyment.
5.4308
5.4299
5.0445
4.9877
5.4146
5.1816
CER ↓
Percentage of characters incorrect in the generated output, measured by Whisper ASR. Lower is better.
5.77%
5.67%
8.54%
11.30%
4.39%
14.62%
Languages support for 99% of the world

Global language coverage

MARS8 is the multilingual backbone that lets you cover 99% of the world while staying native to how your audiences speak and listen.

English
Hindi (India)
French (France)
Spanish (Spain)
German
Japanese
Modern Standard Arabic
Korean
Chinese (Simplified)
Italian
Spanish (Mexico)
Portuguese (Portugal)
Portuguese (Brazil)
Indonesian
Dutch

Want the full technical breakdown?

For a detailed look at MARS8's architecture, deployment patterns, and performance characteristics, read the full technical article on our blog.

Technical document

Build, scale, or partner on your terms

MARS8 is designed to scale across startups, enterprises, and infrastructure providers. Whether you're building a product or enabling others to build, there's a direct path to get started.

Get started for free