Seedream 5.5:
ByteDance's Newest Image Model,
No Key, No Console.

Seedream 5.5 is ByteDance's newest image model, the generation that follows Seedream 5.0 Pro in the same family. Its API documentation covers text-to-image, single- and multi-reference image-to-image with up to ten reference images, and interactive multi-turn editing, with PNG/JPEG output and transparent-background support. On Moosky it runs in the browser and through the Moosky API — no console account and no key to manage.

Yes — the launch release arrives on Moosky next to the rest of the image shelf. Seedream 5.5, Seedream 5.0 Pro, and GPT Image 2.5 all run on one never-expiring credit balance, quoted per image before the run, with failed generations refunded automatically. Nothing to activate and no plan pack with a fuse on it.

Campaign stills and product plates, character sheets built from multiple references, poster and packaging drafts, and clean source frames for image-to-video. Because the same brief can run through every model on the shelf, the usual launch-week workflow is one comparison pass, then a repeatable plate on the engine that won your job.

It is the next generation of the same family. Per ByteDance's published documentation, the noted deltas include PNG as the default output format (where 5.0 Pro defaults to JPEG), the 1K/1.5K/2K delivery tiers, the ten-reference input ceiling, and a quality-first prompt-optimization mode. Our own same-prompt hands-on — photoreal, product shots, multi-reference consistency, editing — publishes beside the launch on the Moosky blog.

Not for browser work: sign in to Moosky and the composer quotes the run. If you already hold provider API keys, that lane stays yours for whatever you own there. If you want programmatic access through Moosky instead, the developer docs cover the API and the MCP path against your Moosky account.

Yes — that is the developer lane: one account, keys on the developer page, the OpenAPI reference at api.moosky.ai/docs, and MCP connections on the same balance as the browser. The model's documented response shape is a non-streaming result with per-image output metadata, which the Moosky execution API wraps in the same queue-and-poll flow as every other model on the shelf.

The documented delivery tiers are 1K, 1.5K, and 2K, with explicit width-height requests inside the published pixel budget and aspect ratios from 1:16 to 16:1. Output is PNG by default with JPEG optional, and backgrounds render transparent, opaque, or model-chosen.

In credits, like everything else on the shelf: credits buy at 100 per dollar and never expire, the composer quotes the exact credit cost of your size, format, and reference bundle before the run starts, and failed generations refund automatically. There is no subscription and no expiring image quota — a quiet month costs nothing.

That is the ByteDance pipeline — the family's image models feed its video models. On Moosky the hand-off is a tab away: send an accepted plate to Seedance 2.5, Wan 3.0, or LTX 2.5 image-to-video and get a clip with synced dialogue and sound, priced per clip on the same credit balance.