Unified generation + edit family
Magazine-grade compositions
Bytedance Seedream 4 — unified text-to-image and single-sentence editing up to 4K. The production checkpoint before Seedream 4.5.
Bytedance4K stillsEdit + generate
Seedream 4 — the Bytedance still model before Seedream 4.5
Seedream 4 is Bytedance's first widely deployed unified still checkpoint on Replicate — text-to-image plus single-sentence editing up to 4K in one API shape. Teams still search Seedream 4 when they need to reproduce an older seed, when budgets block the newest weights, or when a legacy pipeline pins `bytedance/seedream-4` in automation. Seedream 4 remains strong for editorial stills, readable short signage, and instruction edits, but Seedream 4.5 adds spatial reasoning and world knowledge on top. On Voor AI, this route pre-selects Seedream 4 so you do not accidentally run 4.5 when your ticket says Seedream 4. The storefront and still-life frames above are typical Seedream 4 outputs — believable architecture and calm product storytelling without the neon drama later models default to.
Replicate GA• Sequential sets• Proven pipeline
Seedream 4 versus Seedream 4.5
Seedream 4 launched as Bytedance's answer to fragmented SDXL fine-tunes — one model for generation and edit. Seedream 4.5 keeps the API but improves geometry, reflections, and cultural props.
If you are greenfield, start on `/seedream-4-5`. Stay on Seedream 4 when compliance, seeds, or training docs explicitly reference the older checkpoint.
Neither Seedream 4 nor 4.5 generates video — pair with Seedance for motion.
Run Seedream 4 today
Generator above locks Seedream 4. Three habits still apply.
1
State size in the UI
Seedream 4 defaults to 2K on many calls — pick 1K for drafts, 4K for print-bound Seedream 4 frames.
2
Keep instructions scoped for edits
Seedream 4 edit mode uses the same ONLY/KEEP phrasing as 4.5 — one change per sentence.
3
Compare one prompt on 4.5
Run the winner on Seedream 4.5 once. If 4.5 is clearly better, migrate the campaign; if not, Seedream 4 saved you credits.
Seedream 4 — FAQ
Should new users pick Seedream 4?
Default to Seedream 4.5. Use Seedream 4 for legacy reproducibility.
Same edit syntax as 4.5?
Largely yes — natural-language instructions with image input.
Is Seedream 4 cheaper?
Pricing follows Voor AI credits and Replicate cost — compare runs on your plan.
Typo seadream 4?
This page targets Seedream 4 intent; `/seadream-4` redirects here.
Where Seedream 4 still wins
Seedream 4 is not obsolete — it is scoped.
Reproducible legacy seeds
Automation that stored Seedream 4 version hashes still needs Seedream 4 for bitwise continuity. Do not swap to 4.5 mid-campaign without retesting.
Unified edit API
Seedream 4 already supported `image_input` instructions. Teams that learned editing on Seedream 4 can migrate skills to Seedream 4.5 with the same prompt grammar.
4K masters
Seedream 4 4K exports remain valid for print mockups when 4.5 credits are tight. Upscale only the frames that ship.
Lower surprise factor
Seedream 4 compositions are calmer than 4.5's cinematic defaults — useful for conservative brand guides.
Why Seedream 4 stays in production
Long-running ad ops hate silent upgrades. Seedream 4 gives them a stable Replicate ID while they schedule 4.5 retraining.
Seedream 4 also serves educators explaining Bytedance's stack chronologically — 4 before 4.5 before Seedance 2.