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Zero-Shot Voice Cloning
Clone any voice with just 3-10 seconds of reference audio. GLM-TTS learns speaker timbre and speaking habits without any fine-tuning required.
Clone any voice in 3 seconds with zero-shot learning. GLM-TTS delivers state-of-the-art emotional expression, streaming inference, and phoneme-level pronunciation control. Free, open-source, and production-ready.
Experience the power of industrial-grade AI voice synthesis directly in your browser. No signup required.
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Upload 3-10 seconds of clear audio to clone any voice instantly
Adjust emotion settings for happy, sad, angry, or neutral tones
Enable streaming for real-time audio generation with low latency
Supports Chinese, English, and mixed-language text input
GLM-TTS combines cutting-edge AI research with production-ready implementation to deliver the most advanced open-source text-to-speech system available.
Clone any voice with just 3-10 seconds of reference audio. GLM-TTS learns speaker timbre and speaking habits without any fine-tuning required.
GRPO multi-reward reinforcement learning enables natural emotional synthesis. Express happiness, sadness, anger, and more with state-of-the-art accuracy.
Real-time voice generation with 400ms first-frame latency. Perfect for interactive applications, virtual assistants, and live broadcasting.
Precise control over polyphone disambiguation and rare character pronunciation through phoneme-level input. Essential for education and professional dubbing.
Primary Chinese support with excellent English capabilities. Handles Chinese-English mixed text and multiple dialects including Sichuan and Northeastern Chinese.
Apache-2.0 licensed code and MIT licensed model weights. Deploy locally, customize freely, and use commercially with proper attribution.
GLM-TTS revolutionizes voice cloning with its two-stage architecture. Just upload 3-10 seconds of clear audio, and watch as the AI learns the speaker's unique characteristics.
Provide 3-10 seconds of clear speech from the target speaker. The cleaner the audio, the better the clone quality.
The LLM backbone extracts speaker embeddings, capturing timbre, speaking pace, and vocal characteristics.
Flow Matching synthesizes natural-sounding speech that matches the target voice with high fidelity.
Drop reference audio here
3-10 seconds • WAV/MP3 • Clear audio recommended
Listen to the natural, expressive speech generated by GLM-TTS across different voices, languages, and emotional styles.
See how GLM-TTS compares to leading text-to-speech solutions in key performance metrics.
| Feature | GLM-TTS | ElevenLabs | CosyVoice | Fish Audio |
|---|---|---|---|---|
| Character Error Rate (CER) | 0.89% | ~1.5% | 1.38% | ~2% |
| Zero-Shot Voice Cloning | ✓ 3-10s | ✓ 10-30s | ✓ 10s+ | ✓ |
| Emotional Control | GRPO SOTA | Good | Basic | Good |
| Streaming Inference | ✓ 400ms | ✓ 75ms | ✓ | ✓ |
| Chinese Quality | Excellent | Good | Excellent | Good |
| Phoneme Control | ✓ | ✗ | Limited | ✗ |
| Open Source | ✓ Apache-2.0 | ✗ | ✓ | Partial |
| Local Deployment | ✓ | ✗ | ✓ | ✓ |
| Pricing | Free / Low API | $5-$330/mo | Free | Free tier |
Integrate GLM-TTS into your applications with our simple REST API. Get started in minutes.
The GLM-TTS API provides a simple interface for text-to-speech conversion with full control over voice, speed, volume, and streaming options.
tongtong, xiaochen, chuichui, jam, kazi, douji, luodo
Speed (0.5-2x), Volume (0-10), Stream mode
WAV, PCM output at 24000Hz sample rate
# GLM-TTS Python API Example import requests url = "https://open.bigmodel.cn/api/paas/v4/audio/speech" headers = { "Authorization": "Bearer YOUR_API_KEY", "Content-Type": "application/json" } payload = { "model": "glm-tts", "input": "Hello! Welcome to GLM-TTS.", "voice": "tongtong", "speed": 1.0, "volume": 5, "response_format": "wav", "stream": False } response = requests.post(url, headers=headers, json=payload) with open("output.wav", "wb") as f: f.write(response.content) print("GLM-TTS audio saved to output.wav")
Flexible pricing options for individuals, teams, and enterprises.
Self-hosted, full features
Pay-per-use, no commitment
Dedicated support & SLA
Common questions about GLM-TTS voice synthesis and deployment.
Everything you need to get started with GLM-TTS voice synthesis.
Start using GLM-TTS today and experience the future of AI voice synthesis. Free, open-source, and production-ready.