Inputs
Text, plus a built-in voice or explicitly supported voice design/clone controls.
audio-speech capability center
Text-to-Speech API: voices, control, and audio output
Compare TTS models by endpoint, voice controls, billing unit, output workflow, and an executable speech request.
Contract
Inputs, outputs, and lifecycle.
Outputs
Speech audio in a model-supported format, or an audio field in the chat response.
Endpoint
POST /v1/audio/speech or POST /v1/chat/completions, according to api_mode
Lifecycle
Synchronous. Save the binary audio response or decode the audio field returned by chat mode.
Supported tasks
One definition per task.
text-to-speech, voice-cloning, voice-design
Limit: Voice IDs, cloning consent, language coverage, streaming, character limits, and output formats are model-specific.
Matching catalog
7 models with explicit metadata.
Unknown capabilities are omitted, never guessed from a model name. Pricing examples use the synchronized public data; live Dash Pricing remains authoritative.
mimo-v2.5-tts
Xiaomi MiMo-V2.5-TTS — expressive multilingual speech synthesis with built-in voices, natural-language style instructions, emotion, pace, tone, dialect, and character control.
Tasks: video-with-audio, text-to-speech
Endpoint: POST /v1/chat/completions
Cost example: 1 10k characters × $0 = $0.
stepaudio-2.5-tts
StepAudio 2.5 TTS — contextual speech synthesis with inline natural-language direction, expressive delivery, built-in voices, and OpenAI-compatible audio output.
Tasks: video-with-audio, text-to-speech
Endpoint: POST /v1/audio/speech
Cost example: 1 10k characters × $0.85 = $0.85.
glm-tts
GLM-TTS — context-aware speech synthesis with expressive delivery, streaming output, fast first audio, and controls for voice, speed, and volume.
Tasks: video-with-audio, text-to-speech
Endpoint: POST /v1/audio/speech
Cost example: 1 10k characters × $0.35 = $0.35.
qwen3-tts-flash
Qwen3-TTS-Flash — low-latency multilingual speech synthesis with mixed-language input, built-in voices, automatic language matching, and character-based billing.
Tasks: video-with-audio, text-to-speech
Endpoint: POST /v1/audio/speech
Cost example: 1 10k characters × $0.11 = $0.11.
speech-2.8-hd
MiniMax Speech 2.8 HD — high-fidelity speech synthesis with natural emotional delivery, language enhancement, voice controls, and production audio formats.
Tasks: video-with-audio, text-to-speech
Endpoint: POST /v1/audio/speech
Cost example: 1 10k characters × $1 = $1.
speech-2.8-turbo
MiniMax Speech 2.8 Turbo — speed-focused speech synthesis with natural output, emotion controls, language enhancement, and common production audio formats.
Tasks: video-with-audio, text-to-speech
Endpoint: POST /v1/audio/speech
Cost example: 1 10k characters × $0.6 = $0.6.
step-tts-2
Step TTS 2 — expressive speech synthesis with official and cloned voices, speed and volume control, pronunciation mapping, and multiple output formats.
Tasks: video-with-audio, text-to-speech
Endpoint: POST /v1/audio/speech
Cost example: 1 10k characters × $0.414815 = $0.414815.
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Source and method: public model pricing dataset, updated 2026-08-08. Limitations are stated above; third-party claims remain next to the model pages that cite them.