Pricing+7% bonus
MiniMax
Speech 2.5 Turbo Preview
The Speech 2.5 API by MiniMax provides a high-fidelity, low-latency audio-native experience. It supports native speech-to-speech processing and 3-second zero-shot voice cloning, making it ideal for responsive, emotionally intelligent AI agents.

Modalities

Input: Text
Output: Audio

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API Usage Examples
curl --request POST "https://gptproto.com/api/v3/minimax/speech-2.5-turbo-preview/text-to-audio" \
    --header "Authorization: Bearer $GPTPROTO_API_KEY" \
    --header "Content-Type: application/json" \
    --data '{
        "text": "A tiny origami fox sailing a teacup across a moonlit puddle",
        "voice_id": "Wise_Woman",
        "speed": 1,
        "volume": 1,
        "pitch": "0",
        "emotion": "happy",
        "english_normalization": false,
        "sample_rate": 8000,
        "bitrate": 32000,
        "channel": 1,
        "format": "mp3",
        "language_boost": "",
        "enable_sync_mode": false
    }'
Speech 2.5 Turbo Preview pricing

Chat, coding agents & document work. Priced per 1M tokens — input, cached input and output are billed separately. GPTProto is 40% below official rates.

ScenarioMiniMax listOpenRouterGPTProtoYou save / mo
Personal10M tokens / mo$120.00$126.60$72.00−$48.00≈ $576.00 / yr
Team100M tokens / mo$1200.00$1266.00$720.00−$480.00≈ $5760.00 / yr
Business500M tokens / mo$6000.00$6330.00$3600.00−$2400.00≈ $28800.00 / yr
Monthly cost by source
OpenRouter
$0.00
MiniMax
$0.00
GPTProto
$0.00
Save $0.00 / month
Annual savings ≈ $0.00 · pay as you go

Key Speech 2.5 API Features

Explore the technical capabilities that make the Speech 2.5 API the industry leader for emotional, real-time audio.

Native Speech-to-Speech

Direct audio-to-audio processing ensures a latency of <300ms for natural, fluid conversations.

Zero-Shot Voice Cloning

Replicate any voice with high fidelity using only a 3-second sample for instant personalization.

Dynamic Emotional Prosody

Generate laughter, sighs, and breathing sounds to create an incredibly realistic human presence.

48kHz HD Audio Output

Support for high-definition, studio-quality audio delivery suitable for professional production.

Speech 2.5 API Frequently Asked Questions

Get technical insights and pricing details for implementing the Speech 2.5 API in your real-time voice applications and services.

How does the Speech 2.5 API handle latency?

The Speech 2.5 API uses a native speech-to-speech (S2S) architecture that removes the intermediate text-transcription layer. This reduces the Time-To-First-Audio to approximately 280ms in optimal conditions. For the lowest possible latency in interactive applications, we recommend using the WebSocket streaming interface rather than standard chunked HTTP.

Does this 2.5 model support voice cloning?

Yes, the 2.5 turbo model features zero-shot voice cloning. You can replicate a speaker's voice using just a 3-second audio sample. This process requires no secondary training or fine-tuning, allowing you to generate speech with a specific timbre or accent instantly via the /v1/audio/voices endpoint.

What are the Speech 2.5 API pricing rates?

Pricing is based on both token count for input and audio duration for output. Input text is priced at $2.00 per 1M tokens, while input audio costs $0.015 per minute. Generated output audio is billed at $0.030 per minute. GPTProto.com users benefit from unified billing and 50% discounts on cached audio prompts for repeat sessions.

Is my speech data used for model training?

No. Under our Enterprise Privacy Policy, all audio and text data processed through the Speech 2.5 API is not used for training by us or MiniMax. Your intellectual property and voice clones remain private and secure within your project environment.

How does it compare to GPT-4o audio mode?

While GPT-4o has a slightly faster TTFA (~240ms), the Speech 2.5 API offers a higher sampling rate of 48kHz compared to GPT-4o's 24kHz. Additionally, Speech 2.5 provides superior non-verbal emotional cues, such as audible sighs and laughter, which are often limited in other low-latency models.

Can I use the API for bilingual speech?

Absolutely. The model is optimized for bilingual code-switching across more than 25 languages. It can transition between languages like English and Chinese within a single sentence while keeping the speaker's identity and emotional delivery perfectly consistent.

Further Reading

Guides, comparisons, and updates related to this model.

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