01
xai-tts-1
Production-ready text-to-speech at 2.4 credits per 1000 characters, equal to $0.012 per 1000 characters on PoYo, with five voices, language auto-detection, speech tags, and configurable audio output.
xai-tts-1
Text to Speech
Model:
xAI TTS 1 is a low-latency multilingual text-to-speech model for natural, expressive voice generation in real-time voice products and content creation.
Examples
Pricing details
Transparent pricing with no hidden fees. Pay as you go.
xai-tts-1Text to speech
PoYo price
$0.012
2.4 credits
Official price
$0.015
Fal
You save
20%
| Model | Spec | PoYo price | Official price | You save |
|---|---|---|---|---|
| xai-tts-1 | Text to speech | $0.012 2.4 credits per 1000 characters | $0.015 Fal | 20% |
* Actual fees are based on the final output.
Introduction
Complete guide to using Affordable xAI TTS 1 API for Low-Latency Voice
Affordable xAI TTS 1 API for Low-Latency Voice
Build voice agents, support bots, narrations, and multilingual speech products with xAI TTS 1 on PoYo. Use one async API for expressive voices, speech tags, language auto-detection, MP3/WAV/PCM/telephony output, standard task polling, and webhook callbacks with clear per-character billing.
Available xAI TTS 1 API Models on PoYo
Try Playground
Key Features of xAI TTS 1 API
xAI TTS 1 is designed for natural, responsive speech generation in real products, from voice agents to content pipelines.
01
Natural Voice With Low Latency
Generate speech that sounds fluent and expressive without forcing users through a slow batch workflow. This is especially useful for assistants, customer support, and interactive product experiences.
- Create natural delivery for agents and narration.
- Use responsive generation for product workflows.
- Keep billing predictable with per-character pricing.
02
Speech Tags For Fine Control
Add expression directly in the text field with inline and wrapping tags. Teams can keep script and performance direction together instead of maintaining a separate voice direction system.
- Use inline tags such as [laugh], [pause], and [sigh].
- Use wrapping tags such as <whisper> and <slow>.
- Guide tone, timing, and emphasis in one text.
03
20+ Languages With Auto Detection
Set language_code to auto for mixed or unknown scripts, or choose a BCP-47 code for stricter localization workflows. This helps teams ship multilingual voice output without changing endpoints.
- Auto-detect language from the text.
- Support English, Chinese, French, German, Japanese, Korean, Spanish, and more.
- Use one API shape for multilingual voice products.
04
Flexible Audio Output Formats
Choose compact MP3, production WAV or PCM, or telephony-oriented mu-law and A-law output. Configure sample rate and MP3 bit rate from the same request payload.
- Use MP3 for compact playback and delivery.
- Use WAV or PCM for editing and post-production.
- Use mu-law or A-law for telephony pipelines.
What Can You Build With xAI TTS 1 API?
01
Voice Agents
Generate natural assistant responses for product agents, onboarding flows, and real-time support tools.
02
Customer Support Bots
Turn support scripts and dynamic replies into warm, clear speech for automated service experiences.
03
Narration And Voiceovers
Create product demos, short video narration, training audio, announcements, and creator voice tracks.
04
Multilingual Applications
Ship localized spoken output in one workflow with language auto-detection and consistent audio formats.
xAI TTS 1 Pricing: PoYo vs fal.ai
PoYo exposes xAI TTS 1 through the standard async generation workflow with a lower reference unit price based on the provided pricing screenshot.
| Feature | PoYo | Fal.ai |
|---|---|---|
| Public model ID | xai-tts-1 | xai/tts/v1 |
| Fal.ai | $0.012 per 1000 characters | $0.015 per 1000 characters |
| PoYo credits | 2.4 credits per 1000 characters | N/A |
| Max text length | 15000 characters | 15000 characters |
| Output formats | MP3, WAV, PCM, mu-law, A-law | MP3, WAV, PCM, mu-law, A-law |
PoYo pricing uses 2.4 credits per 1000 characters. One credit is priced at $0.005.
How to Use xAI TTS 1 API on PoYo
- Get your API key: Create a PoYo account and generate an API key from the dashboard. Get API Key ->
- Write the script: Enter 1-15000 characters and add tags such as [pause], [laugh], [sigh],
<whisper>, or<slow>when you need expressive delivery. - Choose voice and output: Select eve, ara, rex, sal, or leo; set language_code to auto or a supported BCP-47 code; then choose codec, sample rate, and MP3 bit rate.
- Submit and retrieve: Submit the task through PoYo's generate API, then poll the standard task status endpoint or receive a webhook callback. View API Docs ->
xAI TTS 1 FAQ
What voices does xAI TTS 1 support?
PoYo exposes the five fal/xAI presets: eve for energetic delivery, ara for warm friendly speech, rex for confident clear speech, sal for smooth balanced output, and leo for authoritative narration.
How much does xAI TTS 1 cost on PoYo?
xAI TTS 1 costs 2.4 credits per 1000 characters on PoYo, equal to $0.012 per 1000 characters. Billing is based on the length of the text field.
What is the maximum text length?
The text field supports 1 to 15000 characters per request. Split longer scripts into multiple tasks if you need chapter-level or long-form audio.
Does xAI TTS 1 support automatic language detection?
Yes. Set language_code to auto to let the model detect the language from the text, or pass a supported BCP-47 code such as en, zh, ja, ko, fr, de, ru, es-MX, or pt-BR.
How do speech tags work?
Speech tags are written directly inside text. Use inline tags such as [laugh], [pause], and [sigh], or wrapping tags such as <whisper>text</whisper> and <slow>text</slow> to guide delivery.
Can I output WAV, PCM, mu-law, or A-law?
Yes. output_format.codec supports mp3, wav, pcm, mulaw, and alaw. You can also set sample_rate, and for MP3 you can set bit_rate.
Is xAI TTS 1 suitable for real-time voice agents?
The model is designed for low-latency natural speech, making it a strong fit for voice agents, support bots, assistant replies, and interactive app workflows.
How do I get the generated audio?
Submit a generation task and use the returned task_id with PoYo's standard status endpoint. If callback_url is provided, PoYo sends a webhook when the task finishes or fails.
Why Use PoYo for xAI TTS 1 API Access
01
Affordable Character Billing
Generate xAI TTS 1 speech at $0.012 per 1000 characters with transparent credit usage.
02
Unified API Workflow
Use the same PoYo submit, status, callback, billing, and file retrieval pattern as other generation models.
03
Production Controls
Control voice, language, codec, sample rate, and bit rate from one developer-friendly payload.
04
Reliable Async Results
Submit tasks, poll stable status, and retrieve audio files through PoYo's standard task output structure.