Seedream 5.0 Lite

Specs & limits

• Lite tier of the Seedream 5.0 family (alias seedream-5-0-lite-260128; version date 260128 encoded in the model id)
• a higher-end seedream-5-0-pro-260628 exists separately

per ByteDance official docs ↗

One prompt, measured through the gateway

PROMPT A weathered enamel diner mug on a steel counter, the words "OPEN 24H" stencilled on the mug in worn paint, low winter sun raking in from the left, shallow depth of field.

Seedream 5.0 Lite

Model returned 2048×2048 latency 25 s

One prompt, one request per model, no retries and no cherry-picking - the first result each model returned. Neither size nor duration was pinned: each model used its own default, because a request shaped to fit all of them would flatter none. Files here are re-encoded for the web, so judge composition and prompt adherence, not compression.

Use Seedream 5.0 Lite in 30 seconds

OpenAI-compatible: swap the base_url, keep your SDK. POST /v1/images/generations

from openai import OpenAI

client = OpenAI(
    base_url="https://synthorai.io/v1",
    api_key="sk-syn-...",
)

resp = client.images.generate(
    model="seedream-5-0-260128",
    prompt="a watercolor lighthouse at dawn",
    size="1024x1024",
)
print(resp.data[0].b64_json[:80])

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://synthorai.io/v1",
  apiKey: "sk-syn-...",
});

const resp = await client.images.generate({
  model: "seedream-5-0-260128",
  prompt: "a watercolor lighthouse at dawn",
  size: "1024x1024",
});
console.log(resp.data?.[0]?.b64_json?.slice(0, 80));

curl https://synthorai.io/v1/images/generations \
  -H "Authorization: Bearer sk-syn-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedream-5-0-260128",
    "prompt": "a watercolor lighthouse at dawn",
    "size": "1024x1024"
  }'

package main

import (
	"context"
	"fmt"

	"github.com/openai/openai-go/v3"
	"github.com/openai/openai-go/v3/option"
)

func main() {
	client := openai.NewClient(
		option.WithBaseURL("https://synthorai.io/v1"),
		option.WithAPIKey("sk-syn-..."),
	)
	resp, _ := client.Images.Generate(context.TODO(), openai.ImageGenerateParams{
		Model:  "seedream-5-0-260128",
		Prompt: "a watercolor lighthouse at dawn",
		Size:   "1024x1024",
	})
	fmt.Println(resp.Data[0].B64JSON[:80])
}

import com.openai.client.OpenAIClient;
import com.openai.client.okhttp.OpenAIOkHttpClient;
import com.openai.models.images.*;

OpenAIClient client = OpenAIOkHttpClient.builder()
    .baseUrl("https://synthorai.io/v1")
    .apiKey("sk-syn-...")
    .build();

ImagesResponse resp = client.images().generate(
    ImageGenerateParams.builder()
        .model("seedream-5-0-260128")
        .prompt("a watercolor lighthouse at dawn")
        .size("1024x1024")
        .build());
System.out.println(resp.data().orElseThrow().get(0).b64Json().orElseThrow().substring(0, 80));

About Seedream 5.0 Lite

• It handles text-to-image, single and multi-reference image-to-image, and batch image generation, with streaming delivery, selectable PNG or JPEG output, and high-resolution results up to 4K in the series.
• Two things set it apart from Seedream 4.5 in the published specification.
• It is the only Seedream with a 3K tier, sitting between 2K and 4K for work that needs more than 2K without paying for full 4K, and it is the first in the line where output_format is settable, so PNG is available where earlier versions returned JPEG only; 4K itself was added after the initial release rather than shipping with it.
• Otherwise it inherits the 4.5 profile: up to 14 reference images, batch generation bounded by a total of fifteen reference plus generated images, streaming, and standard-mode generation with no fast option.
• BytePlus lists the API as fully released rather than in preview, and it is the only Seedream served from a second region.
• Note that its release is documented through the catalog and product updates rather than a full model card, so official prose about it is thinner than for 4.0 and 4.5.
• Requests reach it on Synthorai through the platform's OpenAI-compatible API.

FAQ

Related models

Compare