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CaIon ae73ef8e25 feat(plugins): add Seedream 5.0 flash and price each Seedream model by its own tiers
The doubao plugin now serves doubao-seedream-5-0-flash-260915 with 1K,
1.5K and 2K sizes, layer decomposition, output_format and the same
background rules as 5.0 pro.

Seedream models shared one usage schema, so the pricing matrix offered
an up-to-1.5K price and a layer decomposition price for every model.
Each model now gets a profile from its capability table: Seedream 5.0,
5.0 lite and 4.5 start at 2K and show a single image price, and layer
decomposition is listed only for 5.0 pro and flash. Seedance profiles
are built by the same helper. On completion a single-tier model counts
every delivered image at the upper tier, even when the result has no
parseable size.

Usage facts keep all four released image keys, and every Seedance model
still reports video_input, so expressions saved before the per-model
profiles charge as before.
2026-09-30 20:52:51 +08:00
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