Nahlásit chybu / žádost o funkci
Voice Cloning Voice Changer AI Narrator AI Dubbing AI Voice Chat Voice Recorder Voice from Text Celebrity Voice Generator More →

AI Voice — OpenAI: GPT-4o Audio

Komerční využití OK 380+ modely Žádné vodoznaky. Není třeba se zaregistrovat
Vzor:
+ GPT-5, Claude, Gemini
TTS engine Premium
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…
0 znaky ~0 tokens
Cost scales with character count
Generating speech...

What does OpenAI: GPT-4o Audio sound like?

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.

Try the box above with: Hello, my name is Sam, and I am reading this sample to demonstrate the voice. — that is the canonical TTS demo phrase.

When to use OpenAI: GPT-4o Audio

Audiobooks

Long-form narration with consistent tone. Paste a chapter at a time, download as WAV or MP3, and stitch externally.

Podcast intros

Short opening bumpers and ad-reads. Adjust speed for energy, format-switch to MP3 for smaller files.

IVR + voicemail

Phone-system prompts. Studio-quality output without a booking, recording, or NDAs with voice talent.

Accessibility

Add audio alongside written content for low-vision and dyslexic readers. Drop-in on any page.

Sample phrases

"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."

Pricing

Premium TTS. Cost scales with character count — typically ~30 tokens per character. $1 buys 750,000 tokens; a $5 token pack covers tens of thousands of characters. Free signups get 10,000 tokens to try.

Full model reference → · See all TTS voices → · Compare 2 voices side-by-side →

Pokročilé možnosti
Výsledek
Tokeny docházejí. Get More Tokens
Want better results? Premium modely (GPT-5, Claude, Gemini) deliver higher quality. View Plans

❤️ Love this tool? Share it!

Chceš víc? Zaregistrujte se zdarma pro 5K žetony / den + 10K bonus
Zaregistrovat se zdarma

Zpracovávám vaši žádost...

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…

Jak se používá AI Voice — OpenAI: GPT-4o Audio

1
Zadejte svůj vstup

Zadejte text, nahrajte soubor nebo popište, co chcete. Žádný účet nepotřebujete.

2
Klikněte na generovat

Naše AI zpracovává váš požadavek během několika sekund pomocí nejlepších open-source modelů.

3
Stáhnout & podíl

Stáhnout, zkopírovat nebo sdílet svůj výsledek. Volný pro osobní a komerční použití.

Použijte tento nástroj přes API

Automatizovat tento nástroj z vašeho vlastního kódu. OpenAI kompatibilní REST koncového bodu, Bearer-token auth, není potřeba žádný SDK navíc. Token náklady odpovídají webové rozhraní.

Dokumentace API Získat API klíč 
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"}'

Související nástroje volného AI

Voice Cloning
Voice Changer
AI Narrator
AI Dubbing
AI Voice Chat
Voice Recorder
Voice from Text
Celebrity Voice Generator

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.

Zaregistrujte se zdarma pro 10 000 žetonů

Vytvořit volný účet

Kreditní karta není nutná

Jak byste ohodnotili tento nástroj?

4.3/5 from 3 ratings

Love this tool? Share it!