chirp-v4-5-plus is the Suno V4.5+ music creation model, suitable for producing songs with vocals and instrumental music from theme descriptions or self-written lyrics. It is designed for creative tasks that require refining lyrics, titles, and styles, and can also be used to remake older songs. Through this platform's music API, you can submit creative content and retrieve audio and song information, making it easy to integrate previewing, filtering, and delivery into applications.
Submit requests to the public API at api.acedata.cloud using the documented parameters, then use the results in your application.
Input parameters and result formats vary by service. Use the public API for this model and follow its guide for generation, task retrieval and editing operations.
Clarify capacity, inputs and outputs, and invocation methods before selecting a model.
The above input limits and invocation methods apply to this platform's music endpoint; desired duration and vocal preference do not guarantee final output quality.
Learn what chirp-v4-5-plus can bring to your work.
When lyrics are not yet written, use Inspiration Mode to describe the theme, mood, and musical direction; when you already have lyrics, switch to Custom Mode to organize the lyrics, title, and style separately. These two approaches are suited to exploring ideas and developing specific works respectively, so creation does not always have to rely on a vague prompt.
Custom Mode provides separate inputs for lyrics and style, making it easier to arrange verses, choruses, and bridges, and describe genres, instruments, and moods. Vocal tasks can also specify a preference for male or female voices. For works that need to retain the theme of the copy while trying different musical expressions, this structure makes comparison and revision easier.
V4.5+ is not only suitable for generating from scratch; it can also be used to remaster older songs. When you have an existing song, you can start a separate task through remaster, then compare the new audio result with the original. Remastering is suitable for exploring sound presentation and should not be viewed as a guaranteed way to fix all recording issues or precisely preserve every detail.
Start with specific tasks to find where the model can be effective.
Organize brand slogans, event themes, and lyrics that must appear as custom inputs, then use style descriptions to define the musical direction. Deliverables include listenable song audio along with lyrics, titles, and other information. This is suitable for comparing creative options first, then having editors select versions suitable for promotional videos, event openings, or social content.
Describe the scene, mood, and intended use of the music for a video, then set instrumental=true in Inspiration Mode to generate instrumental options. If you need to provide an expected duration, use the custom generation mode with custom=true and use duration as directional guidance; the final product still needs editing based on its actual length. This is suitable for creating soundtrack proposals and listening samples, rather than requiring the music to strictly match every visual cut.
Include existing songs in remastering tasks, retaining the original song ID and new result information to create version records that are easy to compare. Once the task is complete, the application can present the original and remastered versions for listening, then deliver the selected audio. This is suitable for maintaining a creative music library and reassessing older material, rather than automatically replacing human mixing judgment.
Choose based on task complexity, input materials, and expected results.
V4.5+ and chirp-v4-5 are different model options. If you are continuing to use the V4.5 creative workflow and want to try an enhanced-quality version or remaster older songs, you can choose V4.5+. Both can handle custom lyrics and style tasks. It is recommended to compare vocals, arrangement, and thematic expression using the same materials, rather than deciding based only on the Plus name.
chirp-v5 is another version, not an alias for V4.5+. If you already have V4.5+ works and fixed creative templates, you can continue using it to maintain your workflow; when preparing to switch to V5, first compare audition results using representative lyrics and styles. The key is whether the work meets your needs; do not automatically treat the editing features of other versions as capabilities of this model.
Arrange the input first, then connect it to the corresponding application workflow.
Prepare verses, choruses, a bridge, and an outro, give each section one musical direction, and specify the desired duration.
Explicitly select chirp-v4-5-plus. For theme-based creation, use prompt; for custom creation, organize lyric, style, and title according to this model's limits. Save task_id, obtain audio_url after waiting for completion, and archive it together with the work ID and creation settings.
Design tasks directly based on the following inputs and acceptance priorities.
Submit complete lyrics and style; keep the first half restrained, reduce instrumentation in the bridge, expand the final chorus, and save the actual duration of each work.
Check whether sections are complete, whether there is too much repetition, and whether transitions are natural; the desired duration is only guidance, and the final project still needs editing adjustments.
Before formal use, understand the output quality and capability boundaries.
Answers to common questions when using chirp-v4-5-plus.
No. chirp-v4-5-plus corresponds to V4.5+, while chirp-v4-5 corresponds to V4.5; you need to specify model separately when calling them. If you already have a V4.5 template, you can keep the lyrics and style inputs, compare the actual audio from both versions, and then decide whether to use V4.5+.
Select generate and set custom=true, put the lyrics in lyric, and write the title and musical direction in title and style respectively. V4.5+ has a lyric limit of 5000 characters and a style limit of 1000 characters; organize the text into verses, choruses, and other sections to help express the song structure.
You can start in inspiration mode, use custom=false, and describe the theme and musical direction in prompt, up to 500 characters. Set instrumental when instrumental music is needed. If you already have clear lyrics, custom mode is more suitable, so there is no need to squeeze the lyrics and all requirements into the inspiration prompt.
You cannot treat the duration parameter as a hard guarantee. The duration for custom generation can be an integer from 10–360 seconds, but it is used to guide creation. After completion, read duration in the result and audition it; if it is used for a fixed-length video or advertisement, make any necessary edits to the audio.
For generation tasks, you can use async=true to obtain task_id and then query it, or set callback_url to receive results; after completion, save the song ID and audio URL. Remastering an old song is a separate remaster task, which should be initiated using existing song information, then choose after comparing the new audio with the original.
Choose a development approach or application suited to this model and follow its setup guide.
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