Sub-300ms Latency API
The speech 2.5 api delivers industry-leading response times, making real-time conversation seamless and natural.
speech-2.5-turbo-preview-voice-clone / voice-clone
The speech 2.5 api by MiniMax delivers professional-grade zero-shot voice cloning. With a 128k context window and 48kHz output, this api creates natural, emotional audio in over 25 languages with under 300ms latency for real-time applications.
$ 0.5003
$ 0.8338
audio
audio
Speech 2.5 API Standout Features
Key technical advantages of the speech 2.5 api for developers.
48kHz Pro Audio Output
Generate high-fidelity audio with the speech 2.5 api, suitable for professional broadcasting and gaming.
Emotional Prosody Support
The speech 2.5 api goes beyond text to include natural breaths and laughter for ultimate realism.
Zero-Shot Speech Cloning
Replicate any voice using the speech 2.5 api with just a 6-second reference sample, no fine-tuning required.
How to Get a speech-2.5-turbo-preview-voice-clone API Key
Getting a speech-2.5-turbo-preview-voice-clone API key takes four steps and a few minutes. Create a free GPTProto account, add credits, generate your key, and make your first call — at $0.5003 it's a cheaper speech-2.5-turbo-preview-voice-clone API key than going direct, and one key works across every model on the platform. Full speech-2.5-turbo-preview-voice-clone Documentation is in the docs.
Sign up
Create your free GPT Proto account to begin. You can set up an organization for your team at any time.
Top up
Your balance can be used across all models on the platform, including speech-2.5-turbo-preview-voice-clone, giving you the flexibility to experiment and scale as needed.
Generate your API key
In your dashboard, create an API key — you'll need it to authenticate when making requests to speech-2.5-turbo-preview-voice-clone.
Make your first API call
Use your API key with our sample code to send a request to speech-2.5-turbo-preview-voice-clone via GPT Proto and see instant AI-powered results.
Speech 2.5 API Common Questions
Find answers about integrating the speech 2.5 api for cloning and real-time audio.
How fast is the speech 2.5 api?
The speech 2.5 api is designed for real-time interaction, achieving a sub-300ms time-to-first-audio (TTFA). This makes the api ideal for interactive assistants where human-like responsiveness is required. Under optimal conditions, the latency is approximately 280ms, outperforming many competitors while maintaining high-fidelity 48kHz output quality for professional use.
What audio length is needed for cloning?
For zero-shot cloning with the speech 2.5 api, we recommend a reference audio sample between 10 seconds and 5 minutes. While the api can technically function with shorter clips, using at least 10 seconds of clear, noise-free audio ensures the highest similarity score (0.94) and better capture of emotional prosody, including non-verbal cues like breathing and natural pauses.
Does the speech 2.5 api support multiple languages?
Yes, the speech 2.5 api supports over 25 languages, including English, Chinese, Japanese, Korean, and German. A standout feature is its cross-lingual cloning capability, which allows you to take a reference speech sample in one language and generate audio in another while perfectly preserving the original speaker's unique timbre and accent characteristics.
Is the speech 2.5 api pricing cost-effective?
Integrating the speech 2.5 api through GPTProto is highly efficient. Cloning sessions cost approximately $0.05 per session, with audio generation priced at $0.03 per minute. Developers also benefit from a 50% discount on non-real-time batch processing via the /v1/audio/batches endpoint, making it one of the most competitive high-fidelity speech solutions available.
Can I use the speech 2.5 api for singing?
The speech 2.5 api is primarily optimized for natural human conversation and prose. While it excels at emotional speech and non-verbal cues, it is not currently recommended for melodic singing or musical performances. For rhythmic speech or character dialogue in games, however, the api provides industry-leading realism and prosody.
What are the rate limits for the speech 2.5 api?
The default tier for the speech 2.5 api supports 100 requests per minute (RPM) and 50 concurrent streams. This capacity is suitable for most production applications. For enterprise needs requiring higher throughput, quota increases are available through the GPTProto dashboard based on usage history and verified account status.
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