SeamlessM4T v2 Large (Speech)

Meta
Speech-to-Text

Meta SeamlessM4T v2 Large speech mode. Speech-to-speech, speech-to-text, and text-to-speech translation across 100+ languages in a single unified model.

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TL;DR·Last updated May 16, 2026

SeamlessM4T v2 Large (Speech) is speech-to-text AI model from Meta, priced at €0.000 per 1M input tokens with a unknown context window.

Try SeamlessM4T v2 Large (Speech)

Drop audio file here

MP3, WAV, M4A, FLAC (max 25MB)

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Pricing

Price per Generation
Per generation€0.01

API Integration

Use our OpenAI-compatible API to integrate SeamlessM4T v2 Large (Speech) into your application.

Install
npm install railwail
JavaScript / TypeScript
import railwail from "railwail";

const rw = railwail("YOUR_API_KEY");

// Simple — just pass a string
const reply = await rw.run("seamlessm4t-v2-large-speech", "Hello! What can you do?");
console.log(reply);

// With message history
const reply2 = await rw.run("seamlessm4t-v2-large-speech", [
  { role: "system", content: "You are a helpful assistant." },
  { role: "user", content: "Explain quantum computing simply." },
]);
console.log(reply2);

// Full response with usage info
const res = await rw.chat("seamlessm4t-v2-large-speech", [
  { role: "user", content: "Hello!" },
], { temperature: 0.7, max_tokens: 500 });
console.log(res.choices[0].message.content);
console.log(res.usage);
Specifications
Price
€0.01
Developer
Meta
Category
Speech-to-Text
Supported Formats
audio
Tags
replicate
translation
meta
open-weights
speech-to-speech
transcription
seamless

Frequently asked questions

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