Instant Character

Instant Character

Playground

Instant Character transforms an uploaded character image and a text prompt into styled, action- and mood-driven character renders. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

Instant Character is an image-guided character generation model that uses a reference image to keep a subject’s identity consistent while you place them into new scenes with a text prompt. Upload a character image, describe what the character is doing and where the scene takes place, and the model generates a new image that preserves the look while adapting pose, clothing details, and environment to match your prompt. It’s especially useful for character consistency across multiple creative iterations.

Key capabilities

• Reference-image guided character consistency (identity and overall look)
• Prompt-driven scene creation (action, environment, styling)
• Works well for generating multiple variations of the same character
• Custom output size (set width/height directly)
• Seed control for reproducible outputs

Use cases

• Create a consistent character for storyboards, comics, or visual novels
• Generate marketing/lifestyle scenes with the same model/character
• Outfit, pose, and background variations while keeping identity stable
• Rapid creative iteration by changing prompt or seed
• Building character packs for downstream video or design workflows

Pricing

Inputs

• prompt (required): what the character should do and the scene context
• image (required): reference character image

Parameters

• prompt: text instruction (subject action + scene + style)
• image: reference image (upload or URL)
• width / height: output size (e.g., 1280×720)
• seed: random seed (-1 for random; fixed for reproducible results)

Prompting guide

For best consistency, be explicit about “who stays the same” and “what changes”:

Template: Use the same character from the reference image. Place her in [scene]. She is [action]. Style: [photorealistic/cinematic/etc.]. Keep identity consistent.

Example prompts

• Use the same girl from the reference image. She is playing a guitar on a city street, candid street photography style, warm afternoon light, shallow depth of field, realistic details.
• Same character, standing in a rainy alley under neon lights, cinematic mood, wet reflections on the ground, subtle fog, 35mm lens look.
• Same character, sitting in a cozy café reading a book, soft window light, natural colors, calm atmosphere.

Authentication

For authentication details, please refer to the Authentication Guide.

API Endpoints

Submit Task & Query Result

set -euo pipefail

export WAVESPEED_API_KEY="your-api-key"

REQUEST_BODY=$(cat <<'JSON'
{
  "prompt": "A cinematic ocean wave at sunrise, highly detailed",
  "image": "https://interactive-examples.mdn.mozilla.net/media/cc0-images/painted-hand-298-332.jpg",
  "size": "1024*1024"
}
JSON
)

# 1. Submit the prediction.
SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  -X POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/instant-character" \
  -H "Authorization: Bearer ${WAVESPEED_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "${REQUEST_BODY}")

TASK=$(printf '%s' "${SUBMIT_RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
PREDICTION_ID=$(printf '%s' "${TASK}" | jq -r '.id // empty')
if [ -z "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id
' >&2
  exit 1
fi
RESULT_URL=$(printf '%s' "${TASK}" | jq -r '.urls.get // empty')
if [ -z "${RESULT_URL}" ]; then RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"; fi

# 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' "${RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

  case "${STATUS}" in
    completed) printf '%s\n' "${RESULT}" | jq '.outputs'; break ;;
    failed|cancelled|timeout) printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    created|processing) sleep 2 ;;
    *) printf 'Unexpected status: %s
' "${STATUS}" >&2; exit 1 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

Response Parameters

Result Request Parameters

Result Response Parameters