Bailian TTS Models and Integration

These guides cover Qwen-Audio-TTS, CosyVoice, Qwen-TTS and MiniMax. The documented inventory was checked on 2026-10-06. Model availability, token permissions and current prices depend on your ModelSell group.

Authentication

Use a ModelSell API key and the ModelSell base URL. The channel manages provider credentials and workspace addresses.

export MODELSELL_BASE_URL="https://api.modelsell.com"
export MODELSELL_WS_URL="wss://api.modelsell.com"
export MODELSELL_API_KEY="YOUR_MODELSELL_API_KEY"

HTTP uses Authorization: Bearer $MODELSELL_API_KEY and Content-Type: application/json. WebSocket handshakes use the same Authorization header.

Complete Model and Documentation Map

Choose an API

CosyVoice v1 has no native HTTP synthesis route; standard speech bridges to inference WS. Qwen realtime models require WebSocket. AOQ/QUIC transport is outside these HTTP/WS APIs.

Standard Speech

curl --fail-with-body "$MODELSELL_BASE_URL/v1/audio/speech" \
  -H "Authorization: Bearer $MODELSELL_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "cosyvoice-v3-flash",
    "input": "欢迎使用 ModelSell，开始今天的语音创作。",
    "voice": "longanyang",
    "response_format": "mp3",
    "speed": 1.0,
    "extra_body": {"input": {"sample_rate": 24000, "seed": 0}}
  }' --output speech.mp3

Standard fields are model, input (text), voice, response_format, speed, and instructions. Use extra_body.input / extra_body.parameters for native options; explicit zero and false values are preserved. Extensions cannot replace the model or text. stream: true returns binary chunks; stream_format: "sse" preserves native SSE, timestamps and usage. The gateway does not transcode. Qwen HTTP returns WAV synchronously and PCM while streaming.

Usage and Prices

Character models use upstream billing characters; token models use input and output tokens. Qwen3 realtime reports cumulative session characters, while legacy Qwen realtime reports tokens per response. Voice creation and management can have different prices; consult the console rather than assuming queries are free.

Reference: Alibaba Cloud TTS overview. Each guide links to its API reference. Examples contain placeholders, not provider credentials.