Seedream 5.5 Pricing & Test Results - APIYI

Seedream 5.5 Pricing

seedream-5-5-261028 is served through the official BytePlus channel, with the same input-image and 1K / 1.5K / 2K preset output prices as BytePlus. Savings come from APIYI’s recharge promotions, not a modified model price. The highest public tier offers a 20% bonus, bringing the effective cash cost to about 83% of list price.

Input references

$0.008 / imageBilled by actual input_images

Lower-pixel outputs

$0.020 / image1K / 1.5K tiers

Higher-pixel outputs

$0.035 / image2K and exact-dimension tiers

Unit Prices Matching the Official Rate Card

BytePlus defines P as the total pixel count of each output image and prices every image separately.

Billing item	Output pixels / input type	APIYI unit price
Input reference	Each successfully submitted input image	$0.008
Output · lower-pixel tier	921,600 ≤ P ≤ 2,601,123.84, including 1K / 1.5K	$0.020 / image
Output · higher-pixel tier	2,601,123.84 < P ≤ 4,624,220.16, including 2K	$0.035 / image

Model prices align with the official pricing and may change when the provider updates them. This table is for reference only; the Model Pricing tab in the top navigation is authoritative: Model Pricing.

Current settlement behavior: APIYI selects the price tier from the requested size. 1K / 1.5K costs $0.020/image; 2K, an omitted size, and exact WxH dimensions cost $0.035/image. Input and output unit prices for standard presets match the official rate card; exact dimensions currently settle at the higher tier. The official pricing page is docs.byteplus.com/en/docs/modelark/model-pricing.

Pricing Formula

Total (USD) = input references × 0.008
            + lower-pixel outputs × 0.020
            + higher-pixel outputs × 0.035

For one 2K output with 2 reference images:

2 × 0.008 + 1 × 0.035 = 0.051 USD

Measured APIYI Charges

These results come from live APIYI calls on 2026-11-13 (UTC+8). Amounts are differences in the test token’s cumulative usage before and after each call, not estimates derived from the rate card.

Test case	Inputs	Outputs	Actual returned size / count	Measured charge
`1K` text-to-image	0	1	`1248×832`, 1 image	$0.020
`2K` text-to-image	0	1	`2048×2048`, 1 image	$0.035
`1K` + 1 reference	1	1	`1024×1024`, 1 image	$0.028
`2K` + 2 references	2	1	`2368×1776`, 1 image	$0.051
Exact dimensions near the pixel ceiling	0	1	`2240×2064`, 1 image	$0.035
Exact dimensions at the 16:1 boundary	0	1	`8592×537`, 1 image	$0.035
`1K` layer decomposition capped at 3	1	2	Base + 1 layer, both `1024×1024`	$0.048
`1K` + `n: 2`	0	1	`n` ignored; 1 image returned	$0.020

Measured charges verify current billing behavior and are not a future price commitment. Model prices may change with the official rate card; see Model Pricing.

The layer-decomposition charge is:

2 outputs × 0.020 + 1 input × 0.008 = 0.048 USD

Invalid parameters and unsupported features do not produce images or image charges:

Test case	Result	Charge
`2240x2065`, above 4,624,220 pixels	400, pixel ceiling exceeded	$0
`8593x537`, beyond the 16:1 aspect-ratio limit	400, aspect ratio outside the allowed range	$0
`sequential_image_generation: "auto"`	400, unsupported by this model	$0

Effective Cost with Recharge Bonuses

Model prices match the official rate card; savings come from recharge promotions. A bonus does not change the unit price in billing logs. It gives you more usable credit for the same cash payment. Once both the principal and bonus credit are spent, the effective cash cost is:

Effective cash cost = logged amount / (1 + bonus percentage)

These examples use a 1K text-to-image call at $0.020 and a 2K call at $0.035, with no input references:

Single recharge	Bonus	Credited	Effective discount	1K effective cost	2K effective cost
$100 ≤ X < $500	10%	1.10×	about 91%	about $0.0182	about $0.0318
$500 ≤ X < $1,000	12%	1.12×	about 89%	about $0.0179	about $0.0313
$1,000 ≤ X < $3,000	15%	1.15×	about 87%	about $0.0174	about $0.0304
X ≥ $3,000	20%	1.20×	about 83%	about $0.0167	about $0.0292

For an example that includes input references, a 2K request with 2 references logs $0.051. With the 20% bonus tier, its effective cash cost is:

0.051 / 1.20 = 0.0425 USD

The bonus tier is based on each single recharge amount, not your cumulative total. Online payments and corporate transfers are both eligible. The highest public tier is 20%, equivalent to about 83% of list price. Accounts on custom negotiated pricing usually do not also receive recharge bonuses. See Recharge Promotions for eligibility, distribution timing, and current rules.

Billing Notes

Standard generation returns one image: n: 2 is silently ignored and still returns and bills one image; sequential_image_generation returns 400. Make separate requests for multiple standard images.
Layer decomposition bills actual returned images: layer_decomposition_options.max_images is a ceiling, not a guaranteed count, and the single input reference is billed separately.
Failed requests are not billed: size violations, invalid parameters, and moderation rejections produced no image charges in our tests.
Group ratios are separate: prices in this page are official unit prices before group ratios. Recharge-bonus savings and token group ratios are different rules.

Basics

Basic API

Image API (Official)

Video API (Official)

Multimodal Understanding API

Text Generation

Audio API (Official)

Retrieval & Safety

Seedream 5.5 Pricing & Test Results - APIYI