HeyGen: HeyGen Voice Turbo vs Mistral: Voxtral TTS 3

A side-by-side comparison of HeyGen: HeyGen Voice Turbo ($14.00 / 1M characters) and Mistral: Voxtral TTS 3 ($45.50 / 1M characters) using current USD prices and capabilities from the api14 catalog. Both run through the same OpenAI-compatible API.

Specifications

	HeyGen: HeyGen Voice Turbo	Mistral: Voxtral TTS 3
Provider	HeyGen	Mistral
Characters	$14.00 / 1M characters	$45.50 / 1M characters
Context window	-	4,096
Max output	-	3,276
Input	text	text
Output	speech	speech
Tool calling
Structured output
Reasoning control
Added	Oct 13, 2026	Oct 20, 2026

Key differences

HeyGen: HeyGen Voice Turbo is 69% cheaper on input tokens.

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Both models use the same endpoint and request shape. Change the model value from "heygen/heygen-voice-1-turbo" to "mistralai/voxtral-mini-tts-3-0" and prompts, streaming and tools keep working.

HeyGen: HeyGen Voice Turbo details & playground →Mistral: Voxtral TTS 3 details & playground →

import { writeFile } from "node:fs/promises";
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api14.com/api/v1",
  apiKey: process.env.API14_API_KEY,
});

const audio = await client.audio.speech.create({
  "model": "mistralai/voxtral-mini-tts-3-0",
  "input": "Hello from api14! One API for every model.",
  "voice": "alloy",
  "response_format": "mp3"
});
await writeFile("speech.mp3", Buffer.from(await audio.arrayBuffer()));

HeyGen: HeyGen Voice Turbo vs Mistral: Voxtral TTS 3

Specifications

Key differences

Switch with one string

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