Flux Kontext Max API

Pricing

Default example: 1 image at Standard costs 8 credits, or $0.06 at the shared USD reference.

Accepted inputs

Kind

image

Durations

Not applicable

Resolutions

Standard

Aspect ratios

1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 21:9, 9:21

Reference inputs

Images: 1. Videos: unavailable. Audio: 0 (up to 0 bytes).

Defaults

Standard · 1:1 · count 1

Sample request

The request uses the current default settings for this model and the public GenerateMediaRequest schema.

curl -X POST "https://reviral.ai/api/v1/generate-media" \
  -H "Authorization: Bearer $REVIRAL_API_KEY" \
  -H "Idempotency-Key: first-generation" \
  -H "Content-Type: application/json" \
  --data '{"model":"flux-kontext-max","prompt":"A clean product photograph on a warm neutral background","size":"Standard","aspectRatio":"1:1","count":1,"maxCredits":8}'

Response and output

{
  "data": {
    "jobId": "550e8400-e29b-41d4-a716-446655440000",
    "kind": "image",
    "model": "flux-kontext-max",
    "creditsCharged": 8,
    "status": "queued",
    "statusUrl": "/api/v1/jobs/550e8400-e29b-41d4-a716-446655440000"
  }
}

{
  "data": {
    "jobId": "550e8400-e29b-41d4-a716-446655440000",
    "kind": "image",
    "model": "flux-kontext-max",
    "creditsCharged": 8,
    "status": "ready",
    "statusUrl": "/api/v1/jobs/550e8400-e29b-41d4-a716-446655440000",
    "outputUrls": [
      "https://reviral.ai/signed-output"
    ]
  }
}

Error cases

• 404 model_not_available: the ID is no longer in the live catalog.
• 409 price_changed: the current cost differs from maxCredits.
• 422 validation_error: duration, resolution, aspect ratio, size, or count is not accepted.
• 429 rate_limit_exceeded: wait for Retry-After before retrying.

Frequently asked questions

How much does the Flux Kontext Max API cost?

The default 1 image at Standard costs 8 credits, about $0.06 at the shared USD reference. Read the live models endpoint before submitting.

Which inputs does Flux Kontext Max accept?

It accepts the listed generation settings plus up to 1 image, 0 video, and 0 audio references. Zero means that reference kind is unavailable.

How do I retrieve Flux Kontext Max output?

Poll the returned status URL until the job is ready, then download the signed output URL or URLs before they expire.