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GLM-TTS

Default

Standaard English Neutral GLM-TTS

Default is a neutral AI voice powered by the GLM-TTS text-to-speech model. This standard-tier voice speaks English and delivers studio-quality speech synthesis. With moderate generation speed and a quality rating of 5/5, Default is well-suited for applications requiring maximum pronunciation accuracy. The GLM-TTS engine is developed by Tsinghua University (THUDM) under the Custom (GLM-4, non-commercial) license, making it safe for commercial use. Key capabilities include: lowest error rate, highly intelligible, glm architecture, natural prosody.

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GLM-TTSModel Information

Model GLM-TTS
Developer Tsinghua University (THUDM)
Quality
Speed Medium
License Custom (GLM-4, non-commercial)
Cloning .Tekst niet beschikbaar in het Nederlands"
Tier Standard (2 credits/1K chars)
Parameters 300M
Architecture GLM + Flow Matching
Year 2024

Best Use Cases for Default

Recommended applications based on this voice's characteristics

Audiobooks & Narration

Use Default to narrate long-form content with natural prosody and expression.

Video Voiceovers

Add professional narration to YouTube videos, ads, and social media content.

Podcasts & Broadcasting

Studio-quality output suitable for podcasts, radio, and professional broadcasting.

E-Learning & Training

Create engaging training materials, courses, and educational content with clear AI narration.

More GLM-TTS Voices

Other voices from the same TTS model

Default Chinese

Chinese Neutral
View all GLM-TTS voices

Veelgestelde vragen

GLM-TTS by Tsinghua University (THUDM) is a text-to-speech system built on the GLM architecture. It achieves the lowest character error rate among open-source TTS models, meaning it produces the most accurate pronunciation. GLM-TTS supports multiple languages and produces highly intelligible, natural-sounding speech.

GLM-TTS was developed by Tsinghua University (THUDM) and is released under the Custom (GLM-4, non-commercial) license, which permits commercial use of generated audio.

GLM-TTS supports 2 languages: English, Chinese.

GLM-TTS is in the Standard tier — 2 credits per 1,000 characters. You can preview any GLM-TTS voice for free before generating full audio.

GLM-TTS has moderate generation speed. Generation typically takes a few seconds depending on text length.

GLM-TTS is rated 5/5 for audio quality on TTS.ai. It delivers studio-grade, human-like speech.

No, GLM-TTS uses a fixed set of built-in voices. For voice cloning, try models like CosyVoice 2, GPT-SoVITS, or Chatterbox.

Yes, GLM-TTS is specifically recommended for applications requiring maximum pronunciation accuracy. Its lowest error rate, highly intelligible, glm architecture capabilities make it an excellent choice for this use case.

Yes, GLM-TTS is licensed under Custom (GLM-4, non-commercial), which allows commercial use. Audio generated with GLM-TTS voices can be used in videos, podcasts, apps, games, and any other commercial project.

Yes, all voices on TTS.ai use commercially-licensed open-source models (MIT, Apache 2.0). The generated audio is yours to use in videos, podcasts, apps, games, and any other commercial application.

Send a POST request to /api/v1/tts/ with the model name and voice ID. See our API Documentation page for code examples in Python, JavaScript, Go, and cURL.

Yes, click the play button on this page to hear a sample. You can also type custom text on the Text to Speech page and generate a free preview with any voice.

Try Default Now

Type any text and hear it spoken by Default. Free to use.

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