> ## Documentation Index
> Fetch the complete documentation index at: https://docs.infery.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Suno

> AI music generation — full songs, vocals, instrumentals and sound effects.

Suno music generation models available through Infery. Generate full songs from text prompts with optional custom lyrics, style control and vocal settings.

## Music models

| Model          | Slug             | Max duration | Formats  | Operations                                                                                                      |
| -------------- | ---------------- | ------------ | -------- | --------------------------------------------------------------------------------------------------------------- |
| Suno V4        | `suno-v4`        | 240s         | mp3, wav | generate, extend, upload\_cover, upload\_extend, vocal\_removal, lyrics                                         |
| Suno V4.5      | `suno-v4-5`      | 240s         | mp3, wav | generate, extend, upload\_cover, upload\_extend, vocal\_removal, lyrics                                         |
| Suno V4.5 Plus | `suno-v4-5-plus` | 240s         | mp3, wav | generate, extend, upload\_cover, upload\_extend, vocal\_removal, lyrics, add\_vocals, add\_instrumental         |
| Suno V5        | `suno-v5`        | 240s         | mp3, wav | generate, extend, upload\_cover, upload\_extend, vocal\_removal, lyrics, add\_vocals, add\_instrumental, sounds |
| Suno V5.5      | `suno-v5-5`      | 240s         | mp3, wav | generate, extend, upload\_cover, upload\_extend, vocal\_removal, lyrics, add\_vocals, add\_instrumental, sounds |

## Operations

* **generate** — Create a new song from a text prompt. Use `custom_mode: true` for full control over style, title and lyrics.
* **extend** — Continue an existing track from a specific timestamp (`continue_at`). Requires `audio_id`.
* **upload\_cover** — Create a cover version from an uploaded audio file (`upload_url`).
* **upload\_extend** — Extend an uploaded audio file.
* **add\_vocals** — Add vocals to an instrumental track (V4.5 Plus+).
* **add\_instrumental** — Add instrumental backing to a vocal track (V4.5 Plus+).
* **vocal\_removal** — Separate vocals from a track. Use `separation_type: "split_stem"` for up to 12 stems.
* **sounds** — Generate short sound effects (V5+). Supports `sound_loop`, `sound_tempo`, `sound_key`.
* **lyrics** — Generate lyrics from a prompt (low cost).

## Custom mode parameters

When `custom_mode: true`:

* `title` — Track title (max 100 chars)
* `style` — Genre/style description (max 1000 chars)
* `lyrics` — Full lyrics text
* `instrumental` — Set `true` for instrumental only
* `negative_tags` — Styles to exclude
* `vocal_gender` — `"m"` or `"f"`
* `persona_id` / `persona_model` — Apply a saved voice persona

## Tuning parameters

* `style_weight` (0–1) — How closely to follow the style prompt
* `audio_weight` (0–1) — How much input audio influences the output
* `weirdness_constraint` (0–1) — Creativity/novelty level