FLUX.2 Klein 4B API

# ─── Text-to-image ────────────────────────────────────────
curl -X POST https://api.apimodels.app/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "flux-2-klein-4b",
    "prompt": "a serene mountain lake at sunrise, photorealistic",
    "aspect_ratio": "3:2",
    "output_format": "jpg"
  }'
# Response (async — a task is created):
# { "code": 200, "data": { "taskId": "clxxx", "state": "pending" } }


# ─── Image-to-image (up to 3 reference images) ────────────
curl -X POST https://api.apimodels.app/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "flux-2-klein-4b",
    "prompt": "restyle as a soft watercolor painting",
    "image_urls": ["https://example.com/a.jpg", "https://example.com/b.jpg"],
    "aspect_ratio": "match_input_image"
  }'


# ─── Poll for the result ──────────────────────────────────
curl "https://api.apimodels.app/v1/images/generations?task_id=TASK_ID" \
  -H "Authorization: Bearer YOUR_API_KEY"
# { "code": 200, "data": { "state": "completed", "resultUrls": ["https://r2.apimodels.app/..."] } }