# Flux Kontext | Max | Multi Image

For more complex scenes, use multi-image-kontext-max to match color palettes and lighting exactly, creating professional image series and consistent storyboards.

## API Information

- **Model Slug:** multi-image-kontext-max
- **Branded URL:** https://www.eachlabs.ai/black-forest-labs/flux-kontext/multi-image-kontext-max
- **Provider:** Black Forest Labs
- **Category:** Image to Image
- **Output Type:** image
- **Status:** active
- **Version:** 0.0.1
- **Base Cost:** Fixed price per execution: $0.08
- **Estimated Processing Time:** 15 seconds
- **Last Updated:** 2026-04-06
- **Interactive Demo:** https://www.eachlabs.ai/ai-models/multi-image-kontext-max

## Pricing

- **Charge Type:** dynamic
- **Estimated Price (default example):** $0.0800
- **Pricing Details:** Fixed price per execution: $0.08

### Pricing Rules

| Condition | Pricing |
| --- | --- |
| Rule 1 | Fixed price per execution: $0.08 |

## Input Schema

| Parameter | Type | Required | Default | Constraints | Description |
|-----------|------|----------|---------|-------------|-------------|
| prompt | string | Yes | - | - | Text description of how to combine or transform the two input images |
| input_image_1 | string | Yes | - | - | First input image. Must be jpeg, png, gif, or webp. |
| input_image_2 | string | Yes | - | - | Second input image. Must be jpeg, png, gif, or webp. |
| aspect_ratio | string | No | match_input_image | match_input_image,1:1,16:9,9:16,4:3,3:4,3:2,2:3,4:5,5:4,21:9,9:21,2:1,1:2 | An enumeration. |
| seed | integer | No | - | - | Random seed. Set for reproducible generation |
| output_format | string | No | png | jpg,png | An enumeration. |
| safety_tolerance | integer | No | 2 | 0–2 | Safety tolerance, 0 is most strict and 2 is most permissive. 2 is currently the maximum allowed. |

## Example Request

```bash
curl -X POST https://api.eachlabs.ai/v1/prediction/ \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "multi-image-kontext-max",
  "input": {
    "prompt": "Put the woman and the man together at a garden party, the friends pose in the evening light",
    "input_image_1": "https://storage.googleapis.com/magicpoint/inputs/flux-kontext-max-multi-image-input1.webp",
    "input_image_2": "https://storage.googleapis.com/magicpoint/inputs/flux-kontext-max-multi-image-input2.webp"
  }
}'
```

## Output Schema

Response returned by `GET /v1/prediction/{id}` when the job completes:

```json
{
  "status": "success",
  "predictionID": "string",
  "output": "string (URL of generated image)",
  "metrics": {
    "predict_time": "number (seconds)"
  }
}
```

## Polling

```bash
curl https://api.eachlabs.ai/v1/prediction/{PREDICTION_ID} \
  -H "X-API-Key: YOUR_API_KEY"
```

| Status | Meaning |
|--------|---------|
| `processing` | Still running — poll again |
| `success` | Done — read `output` |
| `error` | Failed — read `message` / `details` |

## Webhook (alternative to polling)

Pass `"webhook_url": "https://your.host/path"` in the create request. Eachlabs POSTs this payload when the job ends:

```json
{
  "exec_id": "prediction-uuid",
  "status": "succeeded",
  "output": "https://...",
  "error": ""
}
```

`status` is `"succeeded"` or `"failed"`. `exec_id` equals the `predictionID` from create. Return 2xx within 30 seconds.

## Errors

Error body: `{ "status": "error", "message": "...", "details": "..." }`

| Code | Meaning |
|------|---------|
| `400` | Invalid input |
| `401` | Missing / invalid `X-API-Key` |
| `404` | Unknown model or prediction id |
| `429` | Rate limit — 100 creates / min, 10 concurrent per key |
| `5xx` | Retry with backoff |

## Overview

**multi-image-kontext-max — Image-to-Image AI Model**

Developed by Black Forest Labs as part of the flux-kontext family, **multi-image-kontext-max** excels in image-to-image editing for complex scenes, matching color palettes and lighting across up to 10 reference images to create professional image series and consistent storyboards. This **image-to-image AI model** delivers maximum performance with the highest editing consistency, vast world knowledge, and faithful style representation, making it ideal for precise multi-reference compositions that maintain character consistency and style transfer. Users searching for **Black Forest Labs image-to-image** tools find **multi-image-kontext-max** stands out for its ability to handle up to 10 input images simultaneously, far surpassing typical models in multi-reference control for photorealistic outputs up to 4MP.

## Usage Notes

- API Base URL: `https://api.eachlabs.ai/v1`
- Authentication: send `X-API-Key: YOUR_API_KEY`. Generate a key from the Eachlabs dashboard at https://www.eachlabs.ai/dashboard/api-keys.
- File-typed parameters (`*_url`, `image_url`, `video_url`, `audio_url`, etc.) accept publicly-reachable HTTPS URLs only. Upload your asset first (GCS / S3 / your CDN) and pass the resulting URL. Data-URIs and localhost URLs are rejected.
- For structured parameters (arrays / objects) send real JSON values, not stringified payloads.
- Monetary values are reported in USD; per-token / per-megapixel rates may be billed in micro-cents internally.
- Prefer `webhook_url` over polling for long-running predictions — see the Webhook Callback section.