GPT-4o mini TTS — room for your next idea
Audio
GPT 4O Mini TTS
by Henri Huotari · Oct 28, 2026
A short English brand introduction with OpenAI speech generation and the Coral voice. Demonstrates an explicitly selected speech model, voice and speed, with the exact source script and returned MP3.
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Run it yourself
Set IMMERSIVE_API_KEY to an API key from your account. Create a free account to get one.
curl -X POST 'https://ai.im.inc/api/v1/audio/tts' \
-H "Authorization: Bearer $IMMERSIVE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"async": true,
"input": "An idea can start anywhere. With a shape. A colour. A few words. Bring it to life with image, video, audio, text and 3D models, all through Immersive AI. One API. Room for your next idea.",
"model": "gpt-4o-mini-tts",
"speed": 1,
"voice": "coral",
"provider": "openai"
}'
# Set JOB_ID to the response's "id", then poll every few seconds until the job has finished:
curl "https://ai.im.inc/api/v1/audio/$JOB_ID" \
-H "Authorization: Bearer $IMMERSIVE_API_KEY"
# The finished response has the result at url.
const headers = { Authorization: `Bearer ${process.env.IMMERSIVE_API_KEY}` };
const response = await fetch("https://ai.im.inc/api/v1/audio/tts", {
method: "POST",
headers: { ...headers, "Content-Type": "application/json" },
body: JSON.stringify({
"async": true,
"input": "An idea can start anywhere. With a shape. A colour. A few words. Bring it to life with image, video, audio, text and 3D models, all through Immersive AI. One API. Room for your next idea.",
"model": "gpt-4o-mini-tts",
"speed": 1,
"voice": "coral",
"provider": "openai"
}),
});
const job = await response.json();
// Poll every few seconds while the job is still running.
const running = ["pending", "queued", "submitted", "starting", "processing", "running", "streaming", "in_queue", "in_progress"];
let result;
do {
await new Promise((resolve) => setTimeout(resolve, 5000));
result = await (await fetch(`https://ai.im.inc/api/v1/audio/${job.id}`, { headers })).json();
} while (running.includes(String(result.status).toLowerCase()));
console.log(result.url);
import os
import time
import requests
headers = {"Authorization": f"Bearer {os.environ['IMMERSIVE_API_KEY']}"}
job = requests.post(
"https://ai.im.inc/api/v1/audio/tts",
headers=headers,
json={
"async": True,
"input": "An idea can start anywhere. With a shape. A colour. A few words. Bring it to life with image, video, audio, text and 3D models, all through Immersive AI. One API. Room for your next idea.",
"model": "gpt-4o-mini-tts",
"speed": 1,
"voice": "coral",
"provider": "openai",
},
timeout=300,
).json()
# Poll every few seconds while the job is still running.
running = {"pending", "queued", "submitted", "starting", "processing", "running", "streaming", "in_queue", "in_progress"}
while True:
time.sleep(5)
result = requests.get(f"https://ai.im.inc/api/v1/audio/{job['id']}", headers=headers, timeout=60).json()
if str(result.get("status", "")).lower() not in running:
break
print(result["url"])
{
"id": "3dd976d0-acfe-4278-8818-a6782a5f65ba",
"url": "https://s3.eu-central-1.amazonaws.com/ai.im.inc/examples/outputs/6a98f239-6fc9-479b-be09-4a55bec03697/result.mp3",
"status": "succeeded",
"speech_id": "3dd976d0-acfe-4278-8818-a6782a5f65ba"
}
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How the job runs
- POST returns the job's id and status right away.
- Poll GET /api/v1/audio/{id} every few seconds while the job is running.
- When status is succeeded, download url. Failed jobs are refunded automatically.
- Endpoint
- POST /api/v1/audio/tts
- Model
- gpt-4o-mini-tts
- Output
- Audio · MP3