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Vendor: ByteDance Model ID: seedream-v5lite Capability: 1024² · CJK prompts · low-latency Pricing: per image, lite tier (live rate) Seedream V5 lite trades resolution and refinement for speed and cost. It’s the right model when you’re still iterating on a prompt and want ten cheap drafts before committing to a Seedream V4 / V4.5 final render. The aesthetic is recognizably Seedream — same illustration strengths, same CJK prompt handling — at a price that lets you brute- force prompt design.

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Request

curl https://llm.bytespike.ai/v1/images/generations \
  -H "x-api-key: $BYTESPIKE_API_KEY" \
  -H "content-type: application/json" \
  -d '{
    "model": "seedream-v5lite",
    "prompt": "An ink-wash mountain at dawn, soft mist",
    "size": "1024x1024",
    "n": 4
  }'

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Body parameters

FieldTypeRequiredDefaultNotes
modelstringyes—seedream-v5lite
promptstringyes—CJK accepted natively.
sizestringno1024x1024Supported: 1024x1024, 1024x1536, 1536x1024.
nintegerno11–4. Each billed separately.
seedintegerno—Reproducibility supported.
negative_promptstringno—Standard SD-style negation.

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Response

{
  "created": 1715174400,
  "data": [{"url": "https://cdn.bytespike.ai/img/...", "revised_prompt": "..."}]
}
URLs pre-signed, 24h expiry.

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Code examples

curl https://llm.bytespike.ai/v1/images/generations \
  -H "x-api-key: $BYTESPIKE_API_KEY" \
  -H "content-type: application/json" \
  -d '{"model": "seedream-v5lite", "prompt": "An ink-wash mountain at dawn", "n": 4}'

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Errors

CodeTriggerBilled?
400 / 401 / 402 / 403StandardNo
413Prompt too longNo
429Rate-limitedNo
451Prompt blocked by upstream safetyNo
5xxUpstream issueNo (auto-retry)

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When to use

  • Prompt iteration / design exploration before committing to a Seedream V4 or V4.5 final render.
  • High-volume ideation where the cost of trying ten variations matters.
  • For aesthetic 1024² finals, see Seedream V4.
  • For 2048² + text-edge fidelity, see Seedream V4.5.

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Limits

LimitValue
Max output resolution1536×1536
Max images per call (n)4
Supports init image (img2img)No
Supports negative promptYes
Supports seed reproductionYes
Sync?Yes (≤15s typical)
Avg latency for 1024²4-6s