rumoredStability AIExpected: Q3 2026

Stable Diffusion 4 API

Next numbered Stable Diffusion release. Expected to reset the open-weight image generation bar.

What we know

Next numbered Stable Diffusion release. Expected to reset the open-weight image generation bar.

Why it matters: SD 4 will be the biggest open-weight image model event since SDXL — heavy search guaranteed.

Expected pricing: ~$0.02–$0.05 per image

Current best equivalent

LIVE ON SKILLBOSS TODAY

Flux 2 Pro

Current frontier image model on SkillBoss from the same open-weight tradition.

Use Flux 2 Pro Now →Get API Key

We'll auto-switch your API calls to Stable Diffusion 4 the moment it launches — no code changes required.

Call it with curl

curl -X POST https://api.skillboss.co/v1/run \
  -H "Authorization: Bearer $SKILLBOSS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "skill_id": "flux-2-pro",
    "input": {
      "prompt": "Say hello from Stable Diffusion 4 — routed via SkillBoss"
    }
  }'

Alternate options

ModelSkill IDTradeoff
Stable Diffusion 3.5 Largestable-diffusion-3.5-largeActual Stability model available today
Flux Schnellflux-schnellFastest / cheapest image model

Notify me when Stable Diffusion 4 launches

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Disclaimer: SkillBoss is an independent multi-provider gateway and is not affiliated with, endorsed by, or sponsored by Stability AI. “Stable Diffusion 4”, “Stability AI”, and all related product names, logos, and trademarks are the property of their respective owners and are referenced here solely for factual comparison purposes. Information on this page is based on public roadmaps, leaks, and industry signals — not an official commitment from Stability AI. Actual release dates, names, features, and pricing may differ. See our full IP / trademark policy.
Stable Diffusion 4 API — Early Access & Alternatives | SkillBoss