VibeVoice 1.5B API

Q: What is the VibeVoice 1.5B model ID?

Use vibevoice as the model parameter. Requests go to https://api.aimlapi.com/v1/tts with your AI/ML API key.

VibeVoice 1.5B is an efficient text-to-speech model that supports multi-speaker dialogue generation with natural-sounding voices.

Modalities: TextAudio
Price: $0.0007per second
Model type: Text to speech
Released: Jan 5, 2026

VibeVoice 1.5B overview

VibeVoice 1.5B by Microsoft

VibeVoice 1.5B API offers fine-grained control over tone, pace, emotion, and language for expressive AI voice applications.

VibeVoice 1.5B specs

Model ID: vibevoice
Developer: Microsoft
Input: Text
Output: Audio
Endpoint: POST https://api.aimlapi.com/v1/tts

VibeVoice 1.5B is a cutting-edge AI voice synthesis model engineered to deliver high-quality, natural-sounding speech with expressive tone modulation across diverse languages and contexts. Designed for scalability and versatility, VibeVoice supports content creators, developers, and enterprises requiring advanced voice generation for applications like virtual assistants, audiobooks, gaming, and multimedia production.

Model Functionality and Input Flexibility

VibeVoice 1.5B processes various input types including plain text, SSML (Speech Synthesis Markup Language), and emotional/style tags to generate lifelike speech with nuanced prosody. The model effectively handles conversational dialogue, narration, and character voices with dynamic intonation.

Performance and Output Quality

Latency: Supports near real-time voice generation optimized for interactive applications such as chatbots and live broadcasts.
Audio Quality: Produces studio-grade audio with clear articulation, natural intonation, and smooth transitions suitable for professional and consumer-facing use cases.
Expressiveness: Enables fine-grained control of emotional tone, emphasis, pacing, and accent adaptations to fit diverse storytelling and branding needs.

Technical Architecture

Built upon a transformer-based neural TTS backbone augmented with advanced prosody modeling modules, VibeVoice 1.5B leverages multi-layer self-attention mechanisms and convolutional layers tailored for temporal acoustic feature extraction. The model has been trained on a vast corpus of multi-lingual speech recordings and annotated emotional speech datasets, ensuring robust generalization across speakers and styles.

Key Features and Capabilities

Multimodal Input Processing: Accepts rich input formats including textual content with embedded emotional cues and phoneme-level instructions.
Expressive Voice Customization: Allows detailed adjustment of speech attributes such as pitch, speed, emotional undertones, and speaker identity variations.
Multilingual and Multidialect Support: Produces natural voice outputs across multiple languages and regional dialects with consistent voice quality.

Use Cases and Applications

Virtual Assistants & Chatbots: Engaging, human-like interaction for customer support and digital companions.
Audiobook & Podcast Narration: Dynamic voice performances with character differentiation and emotion.
Gaming & Animation: Realistic character voices with style flexibility for immersive storytelling.
Accessibility Tools: High-quality screen reader voices with customizable expressiveness to enhance user experience.
Content Localization: Fast, natural voice dubbing across languages to support global distribution.

Comparative Analysis

vs Eleven Music: While Eleven Music specializes in AI-driven music generation with complex composition capabilities, VibeVoice excels in natural and expressive voice synthesis, focusing on spoken audio rather than music.

vs Suno AI: Compared to Suno AI’s music generation features, VibeVoice’s strength lies in superior speech quality, more in-depth prosody control, and multilingual voice delivery designed for conversational contexts rather than musical content.

vs Udio: Udio targets simple audio production with limited voice synthesis. VibeVoice offers significantly higher fidelity, detailed emotional variation, and broader application support for professional voice generation needs.

vs MusicAI Sandbox: MusicAI Sandbox focuses on creative music experimentation. In contrast, VibeVoice prioritizes realistic spoken voice output with advanced fine-tuning options for diverse vocal characteristics and styles.

Use cases

Virtual Assistants & Chatbots: Engaging, human-like interaction for customer support and digital companions.
Audiobook & Podcast Narration: Dynamic voice performances with character differentiation and emotion.
Gaming & Animation: Realistic character voices with style flexibility for immersive storytelling.
Accessibility Tools: High-quality screen reader voices with customizable expressiveness to enhance user experience.
Content Localization: Fast, natural voice dubbing across languages to support global distribution.

VibeVoice 1.5B benchmarks by Artificial Analysis

Human-preference results for VibeVoice 1.5B in speech arena, next to models available on AI/ML API. Data retrieved Nov 3, 2026.

Speech Arena#87 / 101953Elo · ±14 at 95%AI/ML API price$0.0007USD per second

Speech Arena

Elo · text-to-speech arena

Models on AI/ML API

Arena results for models you can call with the same API key.

Speech Arena

Listeners hear two clips of the same text and choose the more natural one. VibeVoice 1.5B ranks #87 of 101.

VibeVoice 1.5B API pricing

VibeVoice 1.5B pricing in US dollars
Usage	Price	Unit
Speech generation	$0.0007	per second

Prices from the AI/ML API price list, checked on Nov 4, 2026.

VibeVoice 1.5B vs other speech models: prices

AI/ML API rates for 3 models, per second.

AI/ML API prices in USD per second
Model	Per second
VibeVoice 1.5B	$0.0007
VibeVoice 7B	$0.0007
Seed Audio 1.0	$0.0025

How to use the VibeVoice 1.5B API

View docs

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key

export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/tts' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "vibevoice",
  "script": null
}'

import os
import requests

headers = {
    "Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
    "Content-Type": "application/json",
}
payload = {
    "model": "vibevoice",
    "script": null
}

response = requests.post("https://api.aimlapi.com/v1/tts", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())

const response = await fetch("https://api.aimlapi.com/v1/tts", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "vibevoice",
    "script": null
  }),
});

if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());

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VibeVoice 1.5B FAQ

What inputs and outputs does VibeVoice 1.5B support?

VibeVoice 1.5B takes text as input and returns audio.

How much does VibeVoice 1.5B cost?

VibeVoice 1.5B costs $0.0007 per second on AI/ML API, billed as you go with no subscription.

How is VibeVoice 1.5B billed?

VibeVoice 1.5B costs $0.0007 per second on AI/ML API, billed as you go with no subscription.

Who created VibeVoice 1.5B?

VibeVoice 1.5B was built by Microsoft.

How do I call VibeVoice 1.5B on AI/ML API?

Send a request to https://api.aimlapi.com/v1/tts with vibevoice as the model id.

Is VibeVoice 1.5B available through a single API key?

Yes. VibeVoice 1.5B is served through AI/ML API, so the same key and endpoint format used for other models applies.

What is VibeVoice 1.5B typically used for?

It is designed for generating multi-speaker dialogue with natural-sounding voices in an efficient text-to-speech pipeline.

What is the VibeVoice 1.5B model ID?

Use vibevoice as the model parameter. Requests go to https://api.aimlapi.com/v1/tts with your AI/ML API key.

Start building with VibeVoice 1.5B

Get API key

VibeVoice 1.5B API

vibevoice

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key

export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/tts' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "vibevoice",
  "script": null
}'

import os
import requests

headers = {
    "Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
    "Content-Type": "application/json",
}
payload = {
    "model": "vibevoice",
    "script": null
}

response = requests.post("https://api.aimlapi.com/v1/tts", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())

const response = await fetch("https://api.aimlapi.com/v1/tts", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "vibevoice",
    "script": null
  }),
});

if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());

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VibeVoice 1.5B API

VibeVoice 1.5B overview

VibeVoice 1.5B by Microsoft

VibeVoice 1.5B specs

Model Functionality and Input Flexibility

Performance and Output Quality

Technical Architecture

Key Features and Capabilities

Use Cases and Applications

Comparative Analysis

Use cases

VibeVoice 1.5B benchmarks by Artificial Analysis

Speech Arena

Models on AI/ML API

Speech Arena

VibeVoice 1.5B API pricing

VibeVoice 1.5B vs other speech models: prices

How to use the VibeVoice 1.5B API

Build with your agent

1Get your API key

2Make your first request

Related articles

VibeVoice 1.5B FAQ

Start building with VibeVoice 1.5B

VibeVoice 1.5B API

Build with your agent

1Get your API key

2Make your first request

VibeVoice 1.5B API

VibeVoice 1.5B overview

VibeVoice 1.5B by Microsoft

VibeVoice 1.5B specs

Model Functionality and Input Flexibility

Performance and Output Quality

Technical Architecture

Key Features and Capabilities

Use Cases and Applications

Comparative Analysis

Use cases

Speech Arena

Models on AI/ML API

Speech Arena

VibeVoice 1.5B API pricing

VibeVoice 1.5B vs other speech models: prices

How to use the VibeVoice 1.5B API

Build with your agent

1Get your API key

2Make your first request

Models similar to VibeVoice 1.5B

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VibeVoice 1.5B FAQ

Start building with VibeVoice 1.5B