Platform
Catalog/Generate image/Flux 3
TEXT → IMAGE · Black Forest Labs

Flux 3

Flux 3 is Black Forest Labs' flagship image model, with native 2K and 4K output, precise layout control and strong text rendering.
Medium censorship
PRICE0.18 creditsper image
AVG TIME~12sestimate
OUTPUTimagesync
Open in playground

Inputs

promptrequired · text
params.aspect_ratio1:1 | 3:2 | 16:9 | 21:9 | 9:16 | 2:3 | 3:4 | 4:5 · default 1:1
params.resolution1K | 2K | 4K · default 1K
params.n1 | 2 | 3 | 4 · default 1
Monthly estimate
1,000 × 0.18 credits180.00 credits
curl https://platform.4i.app/api/v1/run \
  -H "Authorization: Bearer $FOURI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "service": "bfl/flux-3",
    "input": {
      "prompt": "Describe an image…"
    },
    "params": {
      "aspect_ratio": "1:1",
      "resolution": "1K"
    }
  }'
Every output has an artifact_id. Pass it as input to any compatible service.
Get your API key →