AI Music Generation API Comparison: The Developer's Guide (2026)
Published 2026-07-03 · ~11 min read
If you're building music generation into an app in 2026, the hard part isn't the integration — it's figuring out which AI music generation API actually exists as a real, documented, developer-facing product. Marketing pages blur the line between "we have an AI model" and "you can call it with an API key today." Some of the most-searched names (Udio, Suno) have no public API at all. Others are instrumental-only, quote-based, or hidden behind enterprise sales calls.
This guide compares every major AI music API a developer can evaluate in mid-2026 — ElevenLabs Eleven Music, Udio, AIVA, Loudly, Mubert, Stability's Stable Audio, Google Lyria, Suno's official status, and our own AI Music API — on the dimensions that decide integrations: vocals, track length, stems, MIDI, editing operations, pricing, free tier, and commercial rights. Every claim below is either cited to the provider's own documentation or marked as not publicly documented. Where a competitor genuinely fits a use case better, we say so.
The comparison table
| API | Vocals | Max length | Stems | MIDI | Extend / Cover | Pricing entry point | Free tier | Commercial rights | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | AI Music API (us) | Yes, multilingual | ~4 min (Sonic V5 with extend); 3 min (Producer) | Yes — 4-track & 12-track | Yes — audio-to-MIDI | Extend, cover, mashup, section replace, personas | $0.08/generation pay-as-you-go | 30 credits, no card | Full commercial, no watermark | | ElevenLabs (Eleven Music) | Yes, multilingual | 5 min | Not documented | No | Section-level editing; extend not documented | $0.15/min via API, paid plans | App free tier; API requires paid plan | "Cleared for nearly all commercial uses" | | Udio | Yes (web app only) | — | — | — | — | No public API (Udio help center) | — | Via web-app subscription only | | AIVA | Instrumental focus | ~5.5 min (Pro web plan) | No | Yes — MIDI export (web app) | Web editor only | API via negotiated licensing agreement; no public rates | 3 downloads/mo (web, non-commercial) | Full copyright on Pro (€49/mo, web) | | Loudly | Not publicly documented (soundtrack focus) | Not publicly documented | Yes — instrument stems | Not documented | Not documented | Volume-based, quote required | Free track allowance on signup | Royalty-free + indemnification | | Mubert | No — instrumental | Not publicly documented | Not documented | No | No | API on Business plan; ~$199/mo per third-party reports | 25 tracks/mo (consumer Render app) | Royalty-free | | Stability (Stable Audio 2.5) | Instrumental focus | 3 min | No | No | Audio-to-audio transform | $0.20/generation (20 credits) | 25 free credits | Per Stability license terms | | Google Lyria (direct) | Yes, multilingual | 3 min | Not exposed | No | Not exposed in public API | Via Gemini API / Vertex AI; ~$0.08/track per third-party reports | Limited free testing in AI Studio | SynthID-watermarked; Google terms | | Suno (official) | Yes (web app only) | — | — | — | — | No public self-serve API; partner program announced July 2026 | — | Via web-app subscription only |
Three things jump out of this table:
- Only three options generate sung vocals via a public API today: AI Music API, ElevenLabs Eleven Music, and Google Lyria. Everything else is instrumental, quote-gated, or app-only.
- The two most-searched names have no API. "Udio AI music API" and "Suno API" are high-volume queries pointing at products you cannot integrate directly.
- Post-processing (stems, MIDI) is rare. If your pipeline needs to do things with the audio after generation, the field narrows fast.
Let's go provider by provider.
ElevenLabs Music Generation API (Eleven Music)
ElevenLabs is best known for voice synthesis, but Eleven Music is a genuine, well-documented music generation API. It produces tracks from 3 seconds up to 5 minutes — the longest single-call ceiling of any public API in this comparison — with vocals or instrumental output and multilingual lyrics (English, Spanish, German, Japanese, and more, per their docs).
API pricing is $0.15 per minute of generated audio, and API access requires a paid subscription. Output is stated as cleared for nearly all commercial uses, from advertising to gaming, with expanded rights on enterprise plans.
Where it shines: long single-take tracks, tight integration if you already use ElevenLabs for voice, strong documentation and official SDKs (Python, TypeScript). Where it's thinner: no documented stem separation or MIDI export, and per-minute pricing means a 4-minute song costs ~$0.60 versus a flat per-generation fee elsewhere.
Udio AI Music API — does it exist?
Short answer: no. Udio's own help center says it plainly: "we don't currently offer a public API". Udio's model produces impressive vocal tracks, but generation is only available through the web app. Everything marketed online as a "Udio API" is a third-party workaround, which means it can break without notice and carries terms-of-service risk you'd be building a product on.
If Udio-style full songs with vocals are what you need programmatically, the realistic options are the vocal-capable APIs in the table above.
AIVA API
AIVA is one of the longest-running AI composition tools, focused on instrumental, orchestral, and cinematic music with genuinely useful MIDI export in its web editor — composers can take an AIVA draft into a DAW and keep working, which is rare in this space.
But AIVA is a creator tool first. Its licensing terms state that API access "would be ruled by a separate Licensing Agreement, to be negotiated and signed between the parties." There is no public developer portal, no self-serve key, and no published API pricing. Web plans run free (3 downloads/month, non-commercial) to €49/month Pro with full copyright ownership.
Verdict for developers: excellent if you're an enterprise willing to negotiate a contract for instrumental composition; not an option for self-serve integration.
Loudly AI Music API
Loudly runs a real developer program with a public developer portal, REST documentation, and a free track allowance on signup. Its focus is copyright-safe soundtrack music for apps, games, and video platforms, with a notable differentiator: the API documents instrument stem retrieval (vocals, drums, bass, and more) and enterprise-grade licensing with indemnification — a real selling point for risk-averse legal teams.
The catch is opacity: pricing is volume-based and quote-driven ("startup, SME, corporate" tiers), and maximum track length and vocal-generation capabilities are not publicly documented. Budget-planning requires a sales conversation.
Verdict: a legitimate choice for background-music-at-scale products where licensing indemnification matters more than per-call pricing transparency.
Mubert API
Mubert generates royalty-free instrumental music and has served the "endless background audio" niche for years — its generative approach suits streams, ambient apps, and functional soundscapes (focus, sleep, workout). API access is positioned for business customers; third-party reviews place it on a ~$199/month Business plan, though Mubert doesn't publish a simple public rate card for the API. The consumer Render app has a free tier (25 tracks/month).
Verdict: worth evaluating for continuous ambient/functional audio; not built for full songs with vocals or post-processing workflows.
Stability AI — Stable Audio API
Stability's developer platform is refreshingly transparent: credits cost $0.01 each, text-to-audio and audio-to-audio generations cost 20 credits (~$0.20), and new accounts get 25 free credits. Stable Audio 2.5 generates stereo tracks up to 3 minutes and supports audio-to-audio transformation, making it a solid pick for instrumental textures, sound design, and production elements.
It is not a full-song-with-vocals engine — the model family is instrumental-focused — and there's no stem or MIDI tooling. Commercial usage follows Stability's license terms, which are worth reading if you're shipping at scale.
Google Lyria (Gemini API / Vertex AI)
Google's Lyria models are accessible to developers through the Gemini API, AI Studio, and Vertex AI, with limited free testing in AI Studio. Lyria 3 Pro generates up to 3-minute tracks with multilingual vocals; third-party reporting puts per-track API cost at roughly $0.08, though Google's own pricing is structured around its cloud billing rather than a simple rate card. Every output carries Google's SynthID watermark.
Going direct through Google Cloud makes sense if you're already deep in the GCP ecosystem. If you want Lyria-class generation alongside other model families under one key, that's exactly what our Producer endpoints exist for — see our Lyria 3 Pro developer guide.
Suno — official API status
Suno has no public self-serve API as of July 2026, but movement is happening: on July 1, 2026, Suno's Chief Product Officer announced the company is exploring a developer API, starting with "a curated group of partners." There's no public developer portal, documentation, or pricing yet. Developers who need Suno-style full songs with vocals today should evaluate the publicly available vocal-capable APIs above.
AI Music API (that's us)
AI Music API is a developer-first REST API exposing three model families under one key: Sonic (up to V5) for full songs with vocals, Riffusion for flexible audio manipulation (vocal swap, sound swap, section replace), and Producer (FUZZ-2.0, Lyria-class) for fast, high-fidelity generation.
What sets it apart in this comparison is the post-generation toolchain, which nothing else in the table matches end-to-end:
- Stems: 4-track (vocals / bass / drums / other) and full 12-track separation
- Audio-to-MIDI: extract multi-instrument MIDI from any generated or uploaded audio
- Editing: extend, cover, mashup, section replace, vocal/sound swap
- Personas: reusable custom vocal identities across generations
- Aligned lyrics: word-level timestamps for karaoke and subtitle workflows
- Delivery: async REST with webhooks or polling, plain Bearer-token auth
Pricing is $0.08 per generation pay-as-you-go — no subscription required — and every new account gets 30 free credits (roughly 3 generations) with no credit card. All output ships with full commercial rights and no watermarks. Monthly plans add higher concurrency (up to 200 concurrent requests on Scale) and consolidated invoicing.
Which AI music API should you pick?
Honest answers by use case — including the ones where we're not the obvious pick.
Full songs with vocals (music apps, creator tools, personalization)
Your realistic shortlist is AI Music API, ElevenLabs Eleven Music, or Google Lyria direct. Choose ElevenLabs if you're already on their voice stack or need single takes beyond 4 minutes. Choose Lyria direct if you're committed to GCP billing and SynthID provenance. Choose AI Music API if you want the lowest per-song entry point ($0.08 flat vs. $0.15/min), multiple model families to A/B against each other, or any downstream processing (stems, MIDI, extend, cover).
Background instrumentals and soundtracks (games, video tools, ambient apps)
This is the most competitive category, and several options genuinely fit. Stable Audio 2.5 is the transparent-pricing pick for instrumental textures at ~$0.20/track. Loudly is compelling when your legal team wants licensing indemnification baked into the contract. Mubert fits continuous, functional audio (focus/sleep/stream soundscapes). AIVA is worth the enterprise negotiation if you specifically need orchestral/cinematic composition with MIDI handoff to human composers. Our Producer model competes here on speed (full tracks in ~30 seconds) and price, but we'd honestly tell an ambient-radio startup to benchmark Mubert too.
Audio post-processing pipelines (stems, MIDI, remix features)
If your product needs to decompose music — karaoke apps, remix tools, DAW plugins, sample libraries — the field is basically two names: AI Music API (4/12-track stems + audio-to-MIDI + aligned lyrics on both generated and uploaded audio) and Loudly (documented instrument-stem retrieval, details behind sales). No other API in this comparison documents MIDI extraction at all.
Short clips and fast iteration (social features, previews, jingles)
Flat per-generation pricing beats per-minute pricing when outputs are short and volume is high. A 30-second jingle costs ~$0.08 via ElevenLabs' per-minute model too — so at the short end, prices converge and latency plus concurrency decide it. Our Producer endpoints return full tracks in ~30 seconds and concurrency scales to 200 parallel requests; Stability's flat $0.20 with 3-minute output is also predictable for batch instrumental work.
Decision flowchart
Work through it top to bottom; take the first exit that matches:
- Do you need sung vocals via API? → No: go to step 4.
- Vocals: do you need stems, MIDI, extend/cover/mashup, or personas after generation? → Yes: AI Music API is the only public API that documents that full toolchain.
- Vocals, generation only: is a single take longer than 4 minutes mandatory? → Yes: ElevenLabs Eleven Music (5-min ceiling). No: compare AI Music API ($0.08/song flat) vs. ElevenLabs ($0.15/min) vs. Lyria direct (if you're GCP-native) on cost per track at your average length — then test all with free credits.
- Instrumental: is contractual indemnification a legal requirement? → Yes: Loudly (or negotiate with AIVA for orchestral work).
- Instrumental: is it continuous/ambient functional audio? → Yes: Mubert.
- Instrumental, discrete tracks, transparent pricing → Stable Audio 2.5 ($0.20/track) or AI Music API Producer with
instrumental: true($0.08/track) — benchmark both with free credits; they have different sonic characters. - Waiting on Udio or Suno official APIs? → Neither exists publicly today. Build on an available API now with an abstraction layer, and swap models later if partner programs open up.
FAQ
Does Udio have a public API?
No. Udio's help center states it does not currently offer a public API — generation is web-app only. Anything sold as a "Udio API" is an unofficial workaround.
Does Suno have an official public API?
Not yet. As of July 2026, Suno has announced it is exploring a developer API with a curated partner group, but there is no public developer portal or self-serve access.
What is the cheapest AI music generation API?
For full songs with vocals: AI Music API at $0.08 per generation flat. For per-minute billing, ElevenLabs charges $0.15/min. For instrumentals, Stable Audio runs ~$0.20 per generation. Always compute cost at your average track length — per-minute and per-generation models cross over around the 30-second mark.
Which AI music APIs generate vocals?
Publicly documented today: AI Music API (Sonic up to V5, Riffusion, Producer), ElevenLabs Eleven Music, and Google Lyria 3 Pro. AIVA, Loudly, Mubert, and Stable Audio are instrumental-focused or don't publicly document vocal generation.
Which music generation API has stems and MIDI?
AI Music API documents both: 4-track and 12-track stem separation plus audio-to-MIDI conversion. Loudly documents instrument-stem retrieval. AIVA exports MIDI in its web editor, but API access requires a negotiated license.
Can I use AI-generated music commercially?
It depends on the provider. AI Music API and Loudly ship full commercial rights with API output; ElevenLabs states output is cleared for nearly all commercial uses; AIVA grants full copyright only on its Pro plan; Stability and Google usage follows their respective license terms. Read the specific license before shipping — "royalty-free" and "you own the copyright" are not the same thing.
Try the vocals-plus-toolchain option free
The comparison above is the map; the territory is how each model sounds on your prompts. Sign up for AI Music API and get 30 free credits — no credit card — to test Sonic V5, Riffusion, and Producer against anything else on this list. One key, one REST surface, webhooks included. Full docs at docs.aimusicapi.ai.