Refinement and rearrangement route
Hermes sends a song with a clear direction to v5.5 to change lyrics, adjust sections, reduce some artifacts, or compare against v5.
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MODEL RESEARCH · AI MUSIC
Suno v5.5 API for Hermes Agent: AI Music Generation and Refinement
The current Hermes Suno v5.5 API route usually returns two complete song options. Hermes Agent decides between Single and Custom, prepares the lyrics and style brief, polls the asynchronous job, and helps a person compare the results.
SUNO · HERMES AGENTSuno v5.5ASYNC MUSIC JOBS · HUMAN REVIEW BEFORE RELEASE
THE SHORT ANSWER
The short answer: use v5.5 for refinement, not as an automatic v5 replacement.
Use Single when you only have a theme or mood. Use Custom when you have lyrics or need control over sections and style tags. If the lyrics do not exist yet, start with Suno Lyrics and hand the result to Custom. Current user discussions often treat v5.5 as a candidate for polishing lyrics, arrangement, or a mix, but results vary by genre. Hermes should run a small same-brief comparison with v5 before changing the production route. Suno does not publish one universal official per-request API price, so use the live Hermes task quote for production planning.
Suno v5.5 APISuno v5.5Suno AI music generatorSuno API
HERMES MODEL ROLE
Best for: an existing lyric or near-final draft
Save the original song and brief, then give v5.5 one target at a time, such as the chorus, intro, or vocal texture.
Do not: treat it as the default flagship for every genre
If you need many different ideas, explore in v5 first and use v5.5 for the selected direction.
HERMES API PRODUCTION PATTERN
How does Hermes put v5.5 into a real production workflow?
v5.5 should not regenerate every draft. It belongs near the end of the creative process: explore many directions with a more controlled route, then send only selected tracks to v5.5 for refinement. Hermes keeps the original lyrics and style brief, changes one target at a time, and checks the result in the real edit.
Explore first, refine second
Hermes can use Suno Lyrics, v5, or Single to create several directions, then send only shortlisted tracks to v5.5. This avoids spending refinement calls on drafts nobody will use.
Change one target at a time
If the intro is too long, change the intro. If the problem is the vocal or the section, test that separately. Hermes saves every request so the team can see what caused the change.
Check it inside the real cut
Hermes does not compare audio in isolation. It places both versions under the ad, short drama, or podcast timeline and checks dialogue space, looping, emotion, and edit points.
HERMES AGENT
What does Hermes Agent do here?
Hermes does more than forward one prompt. It asks whether the music is for a film, short drama, series, ad, or podcast, then structures the scene, timing, space for dialogue, vocals, and instrumental requirements. It submits and polls the job, compares the two outputs, and leaves the final use decision to a person.
STYLE FIT AND CORPUS LIMITS
Music styles and training data: “can generate” is not the same as “ready to ship”
Suno does not publish a genre leaderboard or a complete v5.5 training-corpus list. Its public disclosure describes tens of millions of public music audio files and related text metadata. That can teach broad genre patterns, but it does not make every genre reliable. Hermes should turn style into checkable inputs instead of sending only a genre name.
Pop, electronic, and R&B
Good starting lanes for ad or short-video ideas. State tempo, main instruments, vocal type, and chorus length.
Indie rock, folk, and acoustic
Make a v5 baseline, then test v5.5 for vocals, arrangement, and mix. Do not choose by version number alone.
Cinematic, trailer, and ambient
Describe motion and space: build, peak, pause, and a short intro. Hermes should check that voice-over and visuals still have room.
Multilingual or regional styles
Separate language, pronunciation, regional instruments, and forbidden phrases. A native speaker should check the lyrics and accent.
The corpus note is based on Suno public disclosure; public materials do not provide a version-specific corpus breakdown. Read the public disclosure ↗
TASK SPLIT
When should you use Single or Custom?
Single · Explore directions
Use it when you have a theme, mood, or scene. It returns two complete songs so you can decide which direction deserves more work.
suno-single-v5-5 ↗Custom · Control lyrics and style
Use it when lyrics already exist or you need fixed sections, instruments, tempo, and style tags.
suno-custom-v5-5 ↗Lyrics · Write the words first
Use it when you need Verse, Chorus, and Bridge sections before making the audio.
suno-lyrics ↗WORKFLOW
A complete Suno task in a Hermes Agent
01 · State the use
Tell Hermes the channel, audience, target length, and whether you need vocals or an instrumental track.
02 · Choose the mode
Hermes selects Single, Lyrics, or Custom instead of making the user guess the endpoint.
03 · Generate two options
Submit the asynchronous job and poll its status. Compare the options before calling one a final.
04 · Review by a person
Check lyrics, brand names, rights, loudness, and the final license before using the track publicly.
B2B BATCH WORKFLOW EXAMPLE
Example: a short-drama team scores one episode
A short-drama team needs an opening cue, transition music, and an emotional track for one episode. Hermes reads the storyboard and time codes, marks room for dialogue, fixes the length of each cue, and separates vocal sections from instrumentals. If a vocal theme is needed, it calls Suno Lyrics for a chorus draft, then uses suno-custom-v5 for a baseline. After the direction is approved, Hermes sends the same lyrics, style, and timing brief to suno-custom-v5-5 for refinement and places both versions under the real picture edit. The team checks whether the music covers dialogue, loops cleanly, and fits the cut before applying the route to more episodes.
PRICE AND GUARDRAILS
Do not reverse-engineer a price from a blog post
Suno has no single public per-request API price. Partner prices and routing can differ, and an older model ID may be routed to a newer generation. Use the live Hermes task quote and do not label a partner example as Suno official pricing.
It can make a song. It cannot decide your rights.
Lyrics can contain words that do not fit a brand, and a track can sound close to a familiar style. Hermes can prepare a review list, but your team must confirm commercial rights, trademarks, copyright, and platform rules.
FAQ
Questions people ask before using Suno v5.5
What is the difference between Single and Custom?
Single is for quick directions from an idea. Custom is for existing lyrics and control over sections and style.
Is v5.5 always better than v5?
No. Results vary by genre and task. Hermes should compare the same brief on both routes before changing production.
Why does one request return two songs?
Two options let you compare the vocal, intro, chorus, and mood before spending more time on one direction.
Is Suno Lyrics a music model?
No. It returns lyric text. It is a planning step before a Custom song job.
Does Hermes poll the job for me?
Music generation is usually asynchronous. Hermes should submit the job, poll its status, and organize the result so you do not refresh a page by hand.
Can I use the song in a commercial ad?
Do not assume that you can. Read the current channel license and have a person check lyrics, trademarks, and platform rules.
What is Suno v5.5 API pricing?
There is no single public Suno per-request price. Use the live price on the Hermes API model page.
API ROUTES AND SOURCES
Capabilities and input fields are based on the current Hermes Suno API catalog. Confirm live pricing and rights in the API page and channel terms.
This guide separates official notes, Hermes API routes, and user discussions. Community reports can reveal workflows, but they are not a benchmark, price sheet, or license. Read Suno official Custom mode help ↗