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Free Mimo TTS 2.5 (Voice Design) API

Updated 5/11/2026

Create custom voices using natural language descriptions without needing an audio sample.

About the Model

Why choose MIMO Voice Design 2.5?

This is a way of subverting the traditional speech synthesis. It completely abandons the traditional "selected sound" and "providing audio clones", and it can "create something out of nothing".

Core strengths and characteristics

  • Natural language kneading voice: You only need to enter a text description similar to "Rough, a little middle-aged uncle with a little accent", and the big model can directly generate a unique voice in the world according to semantic understanding.
  • Director mode control: It supports to control the background of the characters, the current scene, and even a specific interpretation style through prompt words, which provides endless imagination space for content creation.
  • Zero-sample requirements: You don't even need to prepare clean audio for dozens of seconds, completely breaking the material limit.

How to call Mimo TTS 2.5 (Voice Design)

python
import os
from openai import OpenAI
import base64

client = OpenAI(
    api_key=os.environ.get("MIMO_API_KEY"),
    base_url="https://api.xiaomimimo.com/v1"
)

completion = client.chat.completions.create(
    model="mimo-v2.5-tts-voicedesign",
    messages=[
        {
            "role": "user", 
            "content": "A deep, gravelly middle-aged male voice with a heavy accent, sounding blunt and matter-of-fact."
        },
        {
            "role": "assistant", 
            "content": "I don't have time for games. Tell me what you know, or leave."
        }
    ],
    audio={ "format": "wav" }
)

audio_bytes = base64.b64decode(completion.choices[0].message.audio.data)
with open("designed_output.wav", "wb") as f:
    f.write(audio_bytes)

Provider Details

The following platforms provide free access to Mimo TTS 2.5 (Voice Design) through free tiers, trial credits, or daily quotas.

ProviderContext WindowFree QuotaRequires CCRatingAction
XiaomiN/AUnlimitedNo
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Details

Frequently Asked Questions

Is Mimo TTS 2.5 (Voice Design) free to use?

Yes. Mimo TTS 2.5 (Voice Design) is available for free through 1 provider(s) listed below, with no purchase required.

What are the rate limits and quotas?

Free access varies by provider — Xiaomi: Unlimited.

How do I get a free Mimo TTS 2.5 (Voice Design) API key?

Sign up with Xiaomi, then create an API key from your dashboard. See the provider details above for the exact steps.

Which providers offer Mimo TTS 2.5 (Voice Design) for free?

Mimo TTS 2.5 (Voice Design) is currently available for free via: Xiaomi.

Know another free provider for Mimo TTS 2.5 (Voice Design)?

Help the community by sharing other ways to access this model for free.