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AI Voice — OpenAI: GPT-4o Audio

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OpenAI: GPT-4o Audio — OpenAI: GPT-4o Audio is an AI model by OpenAI on Free.ai. It supports up to 128,000 tokens of context. Costs approximately 4,781 tokens per message. Try OpenAI: GPT-4o Audio instantly — no sign up needed. Compare it side-by-side with other…
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¿Qué es lo que hace? OpenAI: GPT-4o Audio ¿Suena como?

OpenAI: GPT-4o Audio is an AI model by OpenAI on Free.ai. It supports up to 128,000 tokens of context. Costs approximately 4,781 tokens per message. Try OpenAI: GPT-4o Audio instantly — no sign up needed. Compare it side-by-side with other models.

Pruebe la casilla de arriba con: Hola, mi nombre es Sam, y estoy leyendo esta muestra para demostrar la voz. — esa es la frase canónica demo TTS.

Cuándo usar OpenAI: GPT-4o Audio

Audiolibros

Forma larga narración con tono consistente. Pegar un capítulo a la vez, descargar como WAV o MP3, y coser externamente.

Introducciones de podcast

Parachoques de apertura cortos y lecturas de anuncios. Ajustar la velocidad de energía, cambiar de formato a MP3 para archivos más pequeños.

IVR + buzón de voz

Solicitudes del sistema de teléfono. Salida de calidad de estudio sin una reserva, grabación o NDAs con talento de voz.

Accesibilidad

Añadir audio junto con el contenido escrito para los lectores de visión baja y disléxico.

Ejemplo de frases

"Welcome to the show, today we are exploring the future of AI."
"Your package has arrived. Please retrieve it from the front desk."
"Once upon a time, in a quiet village far away, lived a curious child."
"Press one for sales, two for support, or stay on the line for an agent."
"Breaking news: scientists have discovered a new species of deep-sea fish."
"Thank you for choosing us. We appreciate your business and look forward to serving you again."

Precios

TTS Premium. Escalas de costos con recuento de caracteres — típicamente ~30 tokens por personaje. $1 compra 750.000 tokens; un paquete de $5 tokens cubre decenas de miles de caracteres. Las inscripciones gratuitas obtienen 10.000 tokens para probar.

Referencia completa del modelo → · Ver todas las voces TTS → · Comparar 2 voces lado a lado →

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OpenAI: GPT-4o Audio is an AI model by OpenAI on Free.ai. It supports up to 128,000 tokens of context. Costs approximately 4,781 tokens per message. Try Op…

Cómo usar AI Voice — OpenAI: GPT-4o Audio

1
Introduzca su entrada

Escriba texto, cargue un archivo o describa lo que desee. No necesita cuenta.

2
Haga clic en generar

Nuestra IA procesa su solicitud en segundos utilizando los mejores modelos de código abierto.

3
Descargar & compartir

Descarga, copia o comparte tu resultado. Gratis para uso personal y comercial.

Utilice esta herramienta a través de API

Automatice esta herramienta a partir de su propio código. Endpoint REST compatible con OpenAI, Auth Token de Portador, no requiere SDK adicional. Los costos de token coinciden con la interfaz web.

Documentación API Obtener clave de API 
curl -X POST https://api.free.ai/v1/tts/ \
  -H "Authorization: Bearer sk-free-..." \
  -H "Content-Type: application/json" \
  -d '{"text": "Hello from Free.ai", "voice": "af_heart", "model": "kokoro"}'

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AI Voice — OpenAI: GPT-4o Audio — FAQ

OpenAI: GPT-4o Audio supports a wide range of languages. The exact list depends on the engine; the form on this page accepts any text and the engine will render in its supported languages. See /voice/ for the full multi-engine picker if you need a specific language.

Most engines render neutral-American English by default and a region-appropriate accent for non-English languages. Premium engines may expose accent variants — paste a sample to compare.

SSML support varies by engine. Pause, prosody, and emphasis tags are honored on most premium engines and on a few self-hosted ones. Plain text always works — no markup required.

Streaming TTS is available on premium engines via the /v1/tts/ API endpoint with stream=true. The web UI on this page returns the full clip once rendering finishes.

OpenAI: GPT-4o Audio is a premium TTS engine. Cost scales with character count — typically ~30 tokens per character. $1 buys 750,000 tokens, so a $5 pack covers tens of thousands of characters.

Up to 5,000 characters per request on the web UI. For longer pieces (audiobooks, full chapters), use /voice/audiobook/ which chunks and stitches automatically, or call the API in a loop.

Yes — POST a list of strings to /v1/tts/batch/, or use the workspace UI at /workspace/ to chain TTS into a longer pipeline (e.g., translate → speak → stitch).

Yes — POST text to /v1/tts/ with model="OpenAI: GPT-4o Audio" (or the slug on this page). Returns WAV or MP3. See /api/ for full reference + SDK snippets.

This page is text-to-speech, not voice cloning — the voice is the engine's default. For voice cloning (uploading a reference audio), see /voice/clone/, which requires you to either own the voice rights or have explicit written consent.

Self-hosted engines run on Free.ai-owned GPUs; nothing leaves our servers. Premium engines pass text to upstream model providers under our DPA. We do not train on your inputs and do not sell data.

Yes — Free.ai grants commercial use of generated audio. The engine's underlying license (Apache 2.0, MIT, or vendor terms) is shown above and on the model reference page; in practice this means voiceovers, ads, podcasts, and apps are all in-scope.

Yes — failed jobs auto-refund to the source (daily pool or paid tokens). If a refund does not show up the same day, email contact@free.ai.

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