Gemini 3.1 Flash TTS (Preview)

import os
import wave

from openai import OpenAI

client = OpenAI(
    base_url="https://api.llmapi.ai/v1",
    api_key=os.environ["LLMAPI_KEY"],
)

speech = client.audio.speech.create(
    model="gemini-3.1-flash-tts-preview",
    voice="Kore",
    input="Hello from LLM API",
)
with wave.open("hello.wav", "wb") as f:  # raw PCM: 24 kHz, 16-bit, mono
    f.setnchannels(1)
    f.setsampwidth(2)
    f.setframerate(24000)
    f.writeframes(speech.content)

import fs from "node:fs";
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.llmapi.ai/v1",
  apiKey: process.env.LLMAPI_KEY,
});

const speech = await client.audio.speech.create({
  model: "gemini-3.1-flash-tts-preview",
  voice: "Kore",
  input: "Hello from LLM API",
});
// Raw PCM: 24 kHz, 16-bit, mono
fs.writeFileSync("hello.pcm", Buffer.from(await speech.arrayBuffer()));

# Raw PCM: 24 kHz, 16-bit, mono
curl https://api.llmapi.ai/v1/audio/speech \
  -H "Authorization: Bearer $LLMAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-3.1-flash-tts-preview",
    "voice": "Kore",
    "input": "Hello from LLM API"
  }' \
  --fail-with-body --output hello.pcm