---
title: "FLUX 3 Max"
method: POST
path: "/generate/video/black-forest-labs/flux-3-max"
tags: ["Video"]
---

# FLUX 3 Max

`POST /generate/video/black-forest-labs/flux-3-max`

## Request

- Base URL: `https://api.krea.ai`
- URL: `https://api.krea.ai/generate/video/black-forest-labs/flux-3-max`
- Auth: HTTP bearer

FLUX 3 with stronger prompt adherence.

## Headers

- `X-Webhook-URL` string, uri

## Request body

- object
  - `prompt` string, required
  - `start_image` string, uri, nullable: Can be an external URL, base64 data URI, or uploaded asset URL.
  - `end_image` string, uri, nullable: Can be an external URL, base64 data URI, or uploaded asset URL.
  - `duration` integer
  - `resolution` '720p' | '1080p'
  - `aspect_ratio` 'auto' | '21:9' | '2:1' | '16:9' | '4:3' | '1:1' | '3:4' | '9:16'
  - `generate_audio` boolean
  - `seed` integer
  - `reasoning_level` 'low' | 'high'
  - `keyframes` object[]
    - `frame_index` integer, required
    - `image_url` string, uri, required: Can be an external URL, base64 data URI, or uploaded asset URL.

## Response `200`

The resulting job data. This will be returned in a pending state until the job is completed. See [`/jobs/{id}`](#tag/default/get/jobs/{id}) for retrieving the results.

- object
  - `job_id` string, uuid, required
  - `status` 'backlogged' | 'queued' | 'scheduled' | 'processing' | 'sampling' | 'intermediate-complete' | 'completed' | 'failed' | 'cancelled', required
  - `created_at` string, date-time, required
  - `completed_at` unknown, required
  - `result` unknown, required
  - `error` object
    - `code` string, required
    - `message` string
  - `progress` number, nullable

## Other responses

- `400`: The request body is invalid.
- `401`: You are not authenticated.
- `402`: You have run out of credits.
- `429`: You have reached the maximum number of concurrent jobs.

## Changes

- **2026-10-19** `6ddac49ed42e`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/krea/apis/krea-api/changes/generate/video/black-forest-labs/flux-3-max/post.md)

---

[API](https://skmtc.dev/krea/apis/krea-api.md) · [All operations](https://skmtc.dev/krea/apis/krea-api/llms.txt) · [OpenAPI document](https://skmtc.dev/krea/apis/krea-api/revisions/f503def6ccba?raw)