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POST
FLUX 3 Image Klein
Compact image generation and editing with up to 10 references, five resolution tiers and prompt-based bounding-box layouts.

Quick start

Submission returns a task_id. Use GET /v1/tasks/{task_id} to poll the result. Reference assets must use publicly downloadable URLs.

Parameters

grounding, guidance, negative_prompt, prompt_upsampling, mask_url, width, height and exact-pixel size are not supported. Use aspect_ratio for shape and resolution for output tier.

Reference-image editing

Billing and results

Successful generation and editing use the same fixed per-image rate for the resolution tier. Reference count, steps, seed and format add no fee. Read current rates in the model market or price_config from GET /v1/models. Images are in result.images and videos in result.videos; url is an array. Failed or cancelled tasks receive a full reservation refund. Read final cost in integer quota (500,000 quota = 1 USD) and confirm billing_status is settled. For callbacks, waiting, idempotency and spending limits, see Submit a task。