Available through FAL — FLUX
flux-2-klein-4b
Fast, cheap drafts (FLUX.2 klein) · Fal.ai
What it takes and gives
a prompt → an image · seed, steps, aspect ratio, variations
Price
About 0.91 credits per image
Speed and reliability
Fal.ai: 9 runs in 30 days
Lifecycle
NewAlso runs on
- flux-schnell on Fal.ai · ≈ 0.39 credits · −0.52In app · own key on API
- flux-dev on Fal.ai · ≈ 3.25 credits · +2.34In app · own key on API
- flux-pro on Fal.ai · ≈ 3.25 credits · +2.34In app · own key on API
- qwen-image on Fal.ai · ≈ 3.25 credits · +2.34In app · own key on API
- sd-3.5 on Fal.ai · ≈ 3.25 credits · +2.34In app · own key on API
- sdxl on Fal.ai · ≈ 3.25 credits · +2.34In app · own key on API
Run it from code
With a team API key and a project id. The run answers with a jobId; poll GET /api/v1/runs/{jobId} for the image.
# 1. Once: a workflow that runs flux-2-klein-4b (returns workflowId)
curl -X POST "https://app.sushibelt.ai/api/v1/workflows" \
-H "Authorization: Bearer $SUSHIBELT_API_KEY" \
-H "Content-Type: application/json" \
-d '{"name":"flux-2-klein-4b","projectId":"'"$PROJECT_ID"'","steps":[{"key":"subject","type":"TextEntry","config":{"text":"a red fox in the snow","apiInputKey":"prompt"}},{"key":"image","type":"DiffusionWorker","config":{"providerKey":"fal_ai","model":"flux-2-klein-4b"},"inputs":["subject"]}]}'
# 2. Run it, with your own prompt
curl -X POST "https://app.sushibelt.ai/api/v1/workflows/$WORKFLOW_ID/runs" \
-H "Authorization: Bearer $SUSHIBELT_API_KEY" \
-H "Content-Type: application/json" \
-d '{"inputs":{"prompt":"a red fox in the snow"}}'Where it runs
In app · own key on APIRuns in the app on Sushibelt's Fal.ai account. Through the API it runs only on your own Fal.ai key.
Runs on your own Fal.ai key, or on credits
On your own key, Fal.ai’s terms apply to your team directly.
FLUX.2 [klein] 4B: four steps, under a second, about half a cent an image. The open-licence Flux for drafts and variations.
text-to-imageimage-to-image