# FLUX1.1 Pro Ultra - 2K Text-to-Image Generation

> FLUX1.1 Pro Ultra - 2K Text-to-Image Generation is a paid API for AI agents from fal.ai at fal.mpp.tempo.xyz, paid per call via MPP, $0.06/call, status healthy (last checked 2026-10-11, last successful call 2026-10-05).

Generates photorealistic images up to 2K resolution from text prompts using FLUX1.1 [pro] ultra model with enhanced realism

## Facts

- Endpoint: POST https://fal.mpp.tempo.xyz/fal-ai/flux-pro/v1.1-ultra?utm_source=zero.xyz
- Price: $0.06/call
- Payment: MPP
- Status: healthy
- Last checked: 2026-10-11
- Last successful call: 2026-10-05
- Success rate: 100% of calls made through Zero
- Rating: 4.8 / 5 from 6 reviews
- Activations on Zero: 90
- Provider: fal.ai
- Docs: https://fal.ai/docs
- Website: https://fal.ai
- Tags: image, video, flux, stable-diffusion, grok, generation, ai, media
- Canonical page: https://www.zero.xyz/c/fal-ai-v1-1-ultra-f469bc84
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bIdR12Yid9fR3xmRPY_9B

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fal-ai-v1-1-ultra-f469bc84 -d '<json body>'
```

Example prompt: Generate a photorealistic 2K image of a misty mountain lake at sunrise with pine trees reflected in the water and warm golden light, using 16:9 aspect ratio and 50 inference steps — I want it cinematic and ultra-detailed.

## When to prefer this

Choose this endpoint when you need the highest resolution output (up to 2K) with maximum photorealism from the FLUX family. It is superior to FLUX1.1 [pro] standard when resolution and realism are paramount, and preferable over FLUX.1 [dev] for production-quality outputs. Best suited for cinematic scenes, professional photography simulations, marketing imagery, and any use case where ultra-detailed output justifies the $0.06/call price.

## Known failure modes

- Prompt triggers NSFW filter — has_nsfw_concepts returns true and image may be withheld
- Invalid aspect_ratio value — returns 422 validation error
- num_inference_steps out of valid range — returns 400 or 422 error
- Payment failure (insufficient USDC balance) — returns 402 payment required
- Model timeout for very complex prompts — returns 504 or timeout error
- Empty or missing prompt — returns 400 bad request

## How this service works

FLUX1.1 [pro] ultra - Up to 2K resolution with improved realism

## Output

Returns a JSON object containing the image URL (hosted on fal.media CDN), image dimensions (width and height in pixels, up to 2K resolution), content type (image/jpeg), the seed used for generation, NSFW detection flags, and the resolved prompt text.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "namespace",
  "model",
  "prompt"
 ],
 "properties": {
  "model": {
   "type": "string",
   "description": "The specific model variant (e.g. 'schnell', 'dev')"
  },
  "prompt": {
   "type": "string",
   "description": "Text prompt describing the desired output"
  },
  "namespace": {
   "type": "string",
   "description": "The model family/namespace (e.g. 'flux'), NOT 'fal-ai' which is already in the URL path"
  },
  "image_size": {
   "enum": [
    "landscape_4_3",
    "landscape_16_9",
    "portrait_4_3",
    "portrait_16_9",
    "square",
    "square_hd"
   ],
   "type": "string",
   "description": "Optional image size preset (e.g. 'landscape_4_3', 'square_hd')"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "seed",
  "images",
  "prompt",
  "timings",
  "has_nsfw_concepts"
 ],
 "properties": {
  "seed": {
   "type": "number"
  },
  "images": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "url",
     "width",
     "height",
     "content_type"
    ],
    "properties": {
     "url": {
      "type": "string"
     },
     "width": {
      "type": "number"
     },
     "height": {
      "type": "number"
     },
     "content_type": {
      "type": "string"
     }
    }
   }
  },
  "prompt": {
   "type": "string"
  },
  "timings": {
   "type": "object",
   "required": [],
   "properties": {}
  },
  "has_nsfw_concepts": {
   "type": "array",
   "items": {
    "type": "boolean"
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fal-ai-v1-1-ultra-f469bc84/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fal.mpp.tempo.xyz](https://www.zero.xyz/host/fal.mpp.tempo.xyz/llms.txt)