"AI Audio & Video 2026 — Suno · Runway Gen-4 · Sora 2 Compared"

Suno owns music. Runway owns editing and consistency. Sora 2 owns cinematic with synced sound.

핵심 요약

  • Audience: Anyone making short videos (social, YouTube Shorts, ads) or trying their first AI music — plus creators and developers automating video production.
  • What you'll get: 1) April 2026 pricing and capabilities for music (Suno) and video (Runway, Sora 2), 2) which tool wins per task, 3) per-asset cost (10-second video, one song), 4) free-tier limits and commercial-use rights, 5) a subscription decision framework.
  • One-liner: Music → Suno alone. Video → Runway (editing/consistency) + Sora 2 (cinematic + sound) is the standard combo.

1. April 2026 — what changed

Three big shifts

  1. Sora 2 GA: synced dialogue + sound effects, 1080p standard. Free users lost access on January 10, 2026 — Plus ($20) or Pro ($200) only (official).
  2. Runway Gen-4 + Aleph editor: edit a generated video by text without re-rendering. Character-consistency references. Act-Two motion capture.
  3. Suno V5 / V5.5: 44.1 kHz audio, Persona Voice trained on your own voice, Studio with 12-stem separation and MIDI export.

2. Tool deep-dives

2.1 Suno — top pick for AI music

Pricing (April 2026, official)

Plan Monthly Credits Commercial use
Free $0 50/day ❌
Pro $10/mo (annual) 2,500/mo ✅
Premier $30/mo (annual) 10,000/mo + Studio extras ✅

Highlights - V5 / V5.5 models: 44.1 kHz full audio. ELO 1,293 — top-of-class for AI music. - Persona Voice: trains on your own voice (or uploaded audio). Verification process restricts use to you. - Suno Studio (Premier): DAW-style. 12-stem separation, multi-track edit, MIDI export. - Commercial rights apply only to songs created while subscribed.

Weaknesses - Free tier is non-commercial (can't use in promo/social ads). - Active legal disputes in some jurisdictions — review terms before commercial use.

Use it for - YouTube/social BGM (copyright-safe alternative) - Ad/game BGM mockups - Karaoke-style original songs

2.2 Runway Gen-4 — editing and consistency leader

Pricing (official)

Plan Monthly (annual) Credits
Free $0 125 (one-time)
Standard $12 625/mo
Pro $28 2,250/mo
Unlimited $76 2,250 + Explore Mode (relaxed-rate, unlimited)

Per-asset (10-second video) - Gen-4 Video Turbo: 50 credits - Gen-4 Video: 120 credits - Gen-4.5: 120 credits

Highlights - Character consistency: reference image keeps the same person, outfit, and features across shots. - Aleph editor (July 2025): text-edit a generated video — change a region without re-rendering ("make the background nighttime," "change the car color to red"). - Act-Two motion capture (July 2025): upload a driving performance video + a character reference; the character mirrors that performance. - Up to 60 seconds at 4K in a single generation.

Use it for - YouTube Shorts / social where character consistency matters - Ad work that demands many small edits - Multi-shot scenes with the same person/wardrobe

2.3 Sora 2 — cinematic with synced audio

Pricing (official)

Path Price Notes
ChatGPT Plus $20/mo Unlimited 480p video (post Jan 2026 policy)
ChatGPT Pro $200/mo Higher limits at 720p–1080p
API (sora-2, 720p) $0.10/sec 10s = $1.00
API (sora-2-pro, 720p) $0.30/sec 10s = $3.00
API (sora-2-pro, 1024p) $0.50/sec 10s = $5.00

Highlights - Synced dialogue + sound effects: voice and ambient generated to match the visuals. - Better physics: collisions, gravity, water — meaningfully more realistic. - Real-world insertion: drop a person, animal, or object from real footage into a Sora environment with accurate appearance and voice. - 1080p standard for all generations.

Use it for - Cinematic / dramatic shots - Clips where audio matters and you don't want to score separately - Short dialogue scenes

3. Per-asset cost — 10-second video / one song

Output Tool Cost
10s video (Turbo) Runway Gen-4 Turbo 50 credits (Standard $12 = 625 → ≈ $0.96)
10s video (standard) Runway Gen-4 120 credits ≈ $2.30
10s video (720p, API) Sora 2 $1.00
10s video (720p Pro, API) Sora 2 Pro $3.00
10s video (1024p Pro, API) Sora 2 Pro $5.00
One song (3–4 min, V5) Suno Pro ~100–150 credits (≈ $0.40 with monthly bucket)
Unlimited 480p video ChatGPT Plus + Sora 2 $20/mo

How to read it - Hobby/non-commercial: ChatGPT Plus + Suno Free → $0–20/month. - Regular YouTube content: Runway Standard ($12) + Suno Pro ($10) = $22/month. - Ads / pro production: Runway Pro ($28) + ChatGPT Plus ($20) + Suno Pro ($10) = $58/month, plus pay-per-second on Sora 2 API for cinematic shots.

4. Task → tool

Task First pick Backup Note
YouTube Shorts Runway Gen-4 Sora 2 Character consistency
Cinematic ad spot Sora 2 Runway Gen-4 Synced audio
Music / BGM Suno V5 – Effective monopoly
Vocals with your own voice Suno V5.5 Persona – Voice training
Motion capture / character animation Runway Act-Two – Solo-creator workflow
Partial edit on existing video Runway Aleph – No re-rendering
Short dialogue clip Sora 2 – Synced voice
Same character across many shots Runway oRef Sora 2 Consistency

5. How far the free tier goes

Tool Free quota Limits
Suno Free 50 credits/day (~5–10 songs) Non-commercial only
Runway Free 125 credits (one-time) No top-up
Sora 2 Free ❌ none (post Jan 10, 2026) Plus or Pro required

Best free starting kit: - Music → Suno Free for a week of experiments. - Video → Runway Free 125 credits + ChatGPT Plus ($20) for unlimited 480p Sora 2.

6. Subscription playbooks

"Starting a YouTube Shorts / social channel"

$22/mo: Runway Standard ($12) + Suno Pro ($10). ~60 Turbo videos/month + ~250 songs/month — plenty of headroom.

"Ads or client work"

$58/mo: Runway Pro ($28) + ChatGPT Plus ($20) + Suno Pro ($10). For cinematic shots, top up via the Sora 2 API per-second.

"Music only"

$10/mo: Suno Pro alone. Nothing else needed.

"Maximally free start"

If you already pay for ChatGPT Plus, Sora 2 480p unlimited is a bonus. Combine Suno Free + Runway Free 125 to validate the spend in a week.

7. Cautions

  • Copyright: AI audio/video copyright status is in flux per country and tool. The US/Korea position (2025–2026 cases) is "no human creative contribution → no copyright." Verify ToS and your rights before commercial use.
  • Person/celebrity impersonation: Sora 2 is powerful at human/animal compositing — defamation and deepfake risks are real. Use only yourself or people who consented.
  • Music training-data lawsuits: Suno and Udio face active RIAA-style litigation. Outcomes may shift the guidelines.
  • Policy churn: Sora 2 cut off free users on January 10, 2026 — terms change often. Recheck pricing pages before subscribing.

Developer notes

For API integration:

  1. Sora 2 API: clean per-second billing ($0.10–0.50). Easy to estimate cost for length × resolution sweeps.
  2. Runway API: official docs covers image-to-video and text-to-video.
  3. Suno API: officially private; unofficial wrappers (EvoLink, AI/ML API) exist. Avoid in production until officially released.
  4. Sample pipeline: script (LLM) → voiceover (ElevenLabs / OpenAI TTS) → visuals (Sora 2 / Runway) → BGM (Suno) → FFmpeg muxing. Easy to wire in n8n.
  5. Download immediately: every tool expires URLs after a window. Persist to your own storage (S3, R2) on generation.
  6. Auto-quality scoring: GPT-5 Vision on the first frame + Whisper on the audio. Below threshold → auto-regenerate.

References

This is part 6 of 11 in the AI Basics series. Next: AI automation — n8n + AI nodes, three workflow recipes.

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