Seedream V5.0 Flash Text to Image by ByteDance generates images from text prompts faster and at lower cost than Seedream V5.0 Pro, with aspect ratio selection, multilingual text rendering, and 1K / 1.5K / 2K output at one price. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.
Idle

$0.0243per run·~41 / $1

A minimalist travel poster for Kyoto in autumn: a vermilion pagoda rising among red maple trees, soft morning mist over distant hills, large elegant title text "KYOTO" at the top and smaller text "Autumn Journeys" beneath it, no other text. Clean flat illustration style with subtle paper texture and a warm muted palette.

Editorial street photograph of an elderly fisherman mending a bright orange net on a wooden harbor pier at golden hour, weathered hands in sharp focus, gulls and moored boats softly blurred behind him, natural film grain, 85mm lens, warm low sunlight.

Studio product render of a matte black wireless earbuds case floating above stacked pastel pedestals, soft diffused shadows, subtle reflections, the word "AURA" embossed on the lid, clean seamless peach background, premium minimal advertising look.

Anime-style illustration of a girl with a yellow raincoat standing on a rooftop at dusk, city lights beginning to glow below, a paper plane caught in the wind, vivid sunset gradient sky, detailed clouds, cinematic lighting, crisp line art.

A clean flat-design infographic titled "How Coffee Is Made" with four numbered steps from left to right: 1 Harvest, 2 Dry, 3 Roast, 4 Brew. Each step has a simple icon and a short caption, warm brown and cream color palette, generous whitespace.

Loose watercolor painting of a rustic breakfast table: a bowl of berries, a croissant, a cup of coffee and a small vase of wildflowers, soft bleeding pigments, visible paper texture, light airy morning feeling.

A retro diner storefront at night with a glowing pink and teal neon sign reading "OPEN LATE" and a smaller neon sign reading "Pie & Coffee", rain-slicked sidewalk reflecting the lights, vintage 1950s americana, cinematic night photography.
Seedream V5.0 Flash is the fast, lower-cost tier of Seedream 5.0. It shares Seedream V5.0 Pro's capabilities — information-dense layouts, precise composition, and native multilingual text — and generates images faster at a lower price, for latency- and cost-sensitive image workflows.
Pro capabilities, Flash speed
Same capability set as Seedream V5.0 Pro, tuned for faster generation.
One price for every resolution
1k, 1.5k, and 2k all cost the same, so choose the tier your output needs.
Flexible aspect ratios
Supports square, portrait, landscape, tall, wide, and cinematic aspect ratios.
Multilingual text rendering
Render headlines, labels, and signage directly in the image in many languages.
Standard output formats
Generate images in jpeg or png format.
| Parameter | Required | Description |
|---|---|---|
| prompt | Yes | Positive prompt for the image generation. Describe the subject, scene, style, lighting, composition, and visual details. |
| aspect_ratio | No | Output aspect ratio. Options: 1:1, 1:2, 2:1, 1:3, 3:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 9:21, or 21:9. |
| resolution | No | Output resolution tier: 1k, 1.5k, or 2k. |
| output_format | No | Output image format: jpeg or png. |
1k, 1.5k, or 2k; the price is the same.jpeg or png.A flat $0.027 per image at every resolution.
| Resolution | Cost |
|---|---|
| 1k | $0.027 |
| 1.5k | $0.027 |
| 2k | $0.027 |
2k whenever the image will be cropped or printed.9:16 for vertical mobile content and 16:9 for widescreen layouts.Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/bytedance/seedream-v5.0-flash with your input as JSON. The endpoint returns a prediction id. Start polling the result endpoint around every 2 seconds, increase the interval for long-running tasks, and stop on any terminal status. On completed, read output values from data.outputs. Examples for Seedream v5.0 Flash below.
set -euo pipefail
: "${WAVESPEED_API_KEY:?Set WAVESPEED_API_KEY}"
REQUEST_BODY=$(cat <<'JSON'
{
"prompt": "A cinematic shot of a city at sunset, soft golden light",
"aspect_ratio": "1:1",
"resolution": "1k",
"output_format": "jpeg"
}
JSON
)
# 1. Submit the prediction.
SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
-X POST "https://api.wavespeed.ai/api/v3/bytedance/seedream-v5.0-flash" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $WAVESPEED_API_KEY" \
-d "$REQUEST_BODY")
TASK=$(printf '%s' "$SUBMIT_RESPONSE" | jq 'if has("data") then .data else . end')
PREDICTION_ID=$(printf '%s' "$TASK" | jq -r '.id')
if [ -z "$PREDICTION_ID" ] || [ "$PREDICTION_ID" = "null" ]; then
printf 'Submission response did not contain a prediction id
' >&2
exit 1
fi
RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/$PREDICTION_ID/result"
# 2. Poll until the prediction finishes.
while true; do
RESPONSE=$(curl --silent --show-error --fail-with-body "$RESULT_URL" \
-H "Authorization: Bearer $WAVESPEED_API_KEY")
RESULT=$(printf '%s' "$RESPONSE" | jq 'if has("data") then .data else . end')
STATUS=$(printf '%s' "$RESULT" | jq -r '.status')
case "$STATUS" in
completed) printf '%s\n' "$RESULT" | jq '.outputs'; break ;;
failed|cancelled|timeout|deleted) printf '%s\n' "$RESULT" | jq . >&2; exit 1 ;;
*) sleep 2 ;;
esac
doneconst submitUrl = "https://api.wavespeed.ai/api/v3/bytedance/seedream-v5.0-flash";
const apiKey = process.env.WAVESPEED_API_KEY;
if (!apiKey) throw new Error('Set WAVESPEED_API_KEY');
async function requestJson(url, options = {}) {
const response = await fetch(url, options);
if (!response.ok) throw new Error(await response.text());
return response.json();
}
// 1. Submit the prediction.
const body = await requestJson(submitUrl, {
method: "POST",
headers: {
"Authorization": `Bearer ${apiKey}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
"prompt": "A cinematic shot of a city at sunset, soft golden light",
"aspect_ratio": "1:1",
"resolution": "1k",
"output_format": "jpeg"
}),
});
const task = body.data ?? body;
if (!task.id) throw new Error("Submission response did not contain a prediction id");
const resultUrl = `https://api.wavespeed.ai/api/v3/predictions/${task.id}/result`;
// 2. Poll until the prediction finishes.
while (true) {
const resultBody = await requestJson(resultUrl, {
headers: { "Authorization": `Bearer ${apiKey}` },
});
const result = resultBody.data ?? resultBody;
if (result.status === "completed") {
console.log(result.outputs);
break;
}
if (["failed", "cancelled", "timeout", "deleted"].includes(result.status)) throw new Error(JSON.stringify(result));
await new Promise(resolve => setTimeout(resolve, 2000));
}import json
import os
import time
from urllib.request import Request, urlopen
api_key = os.environ["WAVESPEED_API_KEY"]
headers = {"Authorization": f"Bearer {api_key}", "Content-Type": "application/json"}
payload = {
"prompt": "A cinematic shot of a city at sunset, soft golden light",
"aspect_ratio": "1:1",
"resolution": "1k",
"output_format": "jpeg"
}
def request_json(url, data=None):
request = Request(url, data=data, headers=headers, method="POST" if data else "GET")
with urlopen(request) as response:
return json.load(response)
# 1. Submit the prediction.
body = request_json("https://api.wavespeed.ai/api/v3/bytedance/seedream-v5.0-flash", json.dumps(payload).encode())
task = body.get("data", body)
if not task.get("id"):
raise RuntimeError("Submission response did not contain a prediction id")
result_url = f"https://api.wavespeed.ai/api/v3/predictions/{task['id']}/result"
# 2. Poll until the prediction finishes.
while True:
result_body = request_json(result_url)
result = result_body.get("data", result_body)
status = result.get("status")
if status == "completed":
print(result.get("outputs", []))
break
if status in {"failed", "cancelled", "timeout", "deleted"}:
raise RuntimeError(result)
time.sleep(2)Seedream v5.0 Flash is a ByteDance model for image generation, exposed as a REST API on WaveSpeedAI. Seedream V5.0 Flash Text to Image by ByteDance generates images from text prompts faster and at lower cost than Seedream V5.0 Pro, with aspect ratio selection, multilingual text rendering, and 1K / 1.5K / 2K output at one price. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing. You can call it programmatically or try it from the playground above.
POST your input parameters to the model's REST endpoint (shown in the API tab of this playground) with your WaveSpeedAI API key in the Authorization header. Submission returns a prediction ID. Poll the result endpoint starting around every 2 seconds, increase the interval for long-running tasks, and stop on any terminal status. The playground generates Python, JavaScript, and cURL examples for submitting requests and polling results. Full request/response shape is documented at https://wavespeed.ai/docs/docs-api/bytedance/bytedance-seedream-v5.0-flash.
Seedream v5.0 Flash starts at $0.0243 per run. That figure is the base price — the final charge scales with the parameters you set in the form (output size, length, count, references, or whatever knobs this model exposes), so a higher-quality or larger output costs more than a minimal one. The exact cost for your current input is shown live next to the Generate button before you submit, and the actual per-call charge is recorded on the prediction afterwards.
Key inputs: `prompt`, `aspect_ratio`, `resolution`, `enable_base64_output`, `enable_sync_mode`, `output_format`. The full JSON schema (types, defaults, allowed values) is rendered above the Generate button and mirrored in the API reference at https://wavespeed.ai/docs/docs-api/bytedance/bytedance-seedream-v5.0-flash.
Sign up for a free WaveSpeedAI account to claim starter credits, copy your API key from /accesskey, then call the endpoint shown in the API tab of the playground. The playground also auto-generates a code sample in Python, JavaScript, or cURL for the parameters you've set.
Commercial usage rights depend on the model's license, set by its provider (ByteDance). Check the provider's applicable terms and WaveSpeedAI's Terms of Service before commercial use.