# 01Router — Gateway API reference

> A single REST API for image, video, audio and chat models across fal.ai, Replicate, WaveSpeedAI, KIE AI, APIMart, EvoLink, AtlasCloud, Vercel AI Gateway and OpenRouter.

Base URL: https://01router.com/api/v1
Documentation: https://01router.com/docs
Index: https://01router.com/docs/llms.txt?locale=en
Full reference: https://01router.com/docs/llms-full.txt?locale=en

Generation, task history, cancellation and chat require a key. Catalogs, prompts and quotes are public. Keep the API key on your server.

Responses are illustrative. IDs, usage, prices and results depend on the actual request.


## Model reference

Source: https://01router.com/docs/models/gpt-image-2.5-flare

# GPT Image 2.5 Flare API

OpenAI GPT Image 2.5 Flare: fast everyday generation and editing with precise text rendering.

`POST /api/v1/generations`

Bearer API key

## Input parameters

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| model | string | yes | Model slug from the catalog. Project keys may use a project-specific model slug. | options: [   "gpt-image-2.5-flare" ] |
| input | object | yes | Model-specific input object. See the selected model reference for required fields, defaults and limits. |  |
| provider | string | no | Optional provider slug. Omit for automatic routing; project settings may pin the provider. |  |
| project | string | no | Optional project ID. Use its published model catalog and routing configuration. |  |
| callback_url | string<uri> | no | Public HTTPS URL, up to 1,000 characters. Receives the final generation object. Private network addresses are rejected. |  |
| input.prompt | string | yes |  |  |
| input.image_urls | string<uri>[] | no | Optional — switches to image editing | maxItems: 10 |
| input.aspect_ratio | enum | no |  | default: "1:1"; options: [   "1:1",   "4:3",   "3:4",   "16:9",   "9:16",   "3:2",   "2:3" ] |
| input.quality | enum | no |  | default: "medium"; options: [   "low",   "medium",   "high",   "xhigh",   "max" ] |
| input.num_images | integer | no |  | default: 1; min: 1; max: 4 |

## Response fields

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| id | string | — | Generation ID returned by the create request. |  |
| object | "generation" | — | generation |  |
| model | string | — | Model slug from the catalog. Project keys may use a project-specific model slug. |  |
| type | video \| image \| audio \| chat | — |  |  |
| provider | string | — | Optional provider slug. Omit for automatic routing; project settings may pin the provider. |  |
| status | string | — | queued / processing / succeeded / failed. Stop polling on succeeded or failed. |  |
| input | object | — | Model-specific input object. See the selected model reference for required fields, defaults and limits. |  |
| outputs | string[] | — | Result file URLs. Empty until available; download promptly because URLs may expire. |  |
| error | string \| null | — | Error message on failure; null otherwise. |  |
| credits | number | — | Credits charged for this generation; zero after a refund. |  |
| price_usd | number | — | Price of this generation in USD; zero after a refund. |  |
| created_at | string | — | Creation time in ISO 8601 format. |  |
| completed_at | string \| null | — | Completion time in ISO 8601 format, or null while running. |  |

## cURL

```bash
curl 'https://01router.com/api/v1/generations' \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gpt-image-2.5-flare",
  "input": {
    "prompt": "A cinematic landscape at sunrise.",
    "aspect_ratio": "1:1",
    "quality": "medium",
    "num_images": 1
  }
}'
```

## 200 · application/json

```json
{
  "id": "gen_example",
  "object": "generation",
  "model": "gpt-image-2.5-flare",
  "type": "image",
  "provider": "fal",
  "status": "processing",
  "input": {
    "prompt": "A cinematic landscape at sunrise.",
    "aspect_ratio": "1:1",
    "quality": "medium",
    "num_images": 1
  },
  "outputs": [],
  "error": null,
  "credits": 100,
  "price_usd": 1,
  "created_at": "2026-10-25T08:00:00.000Z",
  "completed_at": null
}
```

## Usage notes

- Poll at intervals of at least 3 seconds. A 504 from the synchronous image endpoint means the task may still be running: poll its error.id instead of submitting it again.


## Endpoints for this model

- [POST /api/v1/generations](https://01router.com/docs/llms-full.txt?locale=en&section=create): Create a generation
- [POST /api/v1/images/generations](https://01router.com/docs/llms-full.txt?locale=en&section=images): OpenAI-compatible images
- [GET /api/v1/generations/{id}](https://01router.com/docs/llms-full.txt?locale=en&section=poll): Get the result
- [POST /api/v1/generations/{id}/cancel](https://01router.com/docs/llms-full.txt?locale=en&section=cancel): Cancel a task
- [POST /api/v1/quote](https://01router.com/docs/llms-full.txt?locale=en&section=quote): Quote
- [GET /api/v1/models/{slug}](https://01router.com/docs/llms-full.txt?locale=en&section=model-detail): Get one model

For /generations and /quote, put these parameters inside input. For /images/generations, put them at the top level. Chat parameters go at the top level of /chat/completions.

Select a provider to see its effective parameter limits. Automatic routing chooses a provider that supports your input. Examples include defaults and required inputs; replace example media URLs with accessible files.

### Provider parameter schemas

```json
[
  {
    "provider": "fal",
    "params": [
      {
        "name": "prompt",
        "type": "text",
        "label": "Prompt",
        "required": true
      },
      {
        "name": "image_urls",
        "type": "images",
        "label": "Reference images",
        "description": "Optional — switches to image editing",
        "maxItems": 10
      },
      {
        "name": "aspect_ratio",
        "type": "enum",
        "label": "Aspect ratio",
        "options": [
          "1:1",
          "4:3",
          "3:4",
          "16:9",
          "9:16",
          "3:2",
          "2:3"
        ],
        "default": "1:1"
      },
      {
        "name": "quality",
        "type": "enum",
        "label": "Quality",
        "options": [
          "low",
          "medium",
          "high",
          "xhigh",
          "max"
        ],
        "default": "medium"
      },
      {
        "name": "num_images",
        "type": "integer",
        "label": "Images",
        "min": 1,
        "max": 4,
        "default": 1
      }
    ]
  },
  {
    "provider": "01router",
    "params": [
      {
        "name": "prompt",
        "type": "text",
        "label": "Prompt",
        "required": true
      },
      {
        "name": "image_urls",
        "type": "images",
        "label": "Reference images",
        "description": "Optional — switches to image editing",
        "maxItems": 10
      },
      {
        "name": "aspect_ratio",
        "type": "enum",
        "label": "Aspect ratio",
        "options": [
          "1:1",
          "4:3",
          "3:4",
          "16:9",
          "9:16",
          "3:2",
          "2:3"
        ],
        "default": "1:1"
      },
      {
        "name": "quality",
        "type": "enum",
        "label": "Quality",
        "options": [
          "low",
          "medium",
          "high",
          "xhigh",
          "max"
        ],
        "default": "medium"
      },
      {
        "name": "num_images",
        "type": "integer",
        "label": "Images",
        "min": 1,
        "max": 4,
        "default": 1
      }
    ]
  },
  {
    "provider": "replicate",
    "params": [
      {
        "name": "prompt",
        "type": "text",
        "label": "Prompt",
        "required": true
      },
      {
        "name": "image_urls",
        "type": "images",
        "label": "Reference images",
        "description": "Optional — switches to image editing",
        "maxItems": 10
      },
      {
        "name": "aspect_ratio",
        "type": "enum",
        "label": "Aspect ratio",
        "options": [
          "1:1",
          "4:3",
          "3:4",
          "16:9",
          "9:16",
          "3:2",
          "2:3"
        ],
        "default": "1:1"
      },
      {
        "name": "quality",
        "type": "enum",
        "label": "Quality",
        "options": [
          "low",
          "medium",
          "high",
          "xhigh",
          "max"
        ],
        "default": "medium"
      },
      {
        "name": "num_images",
        "type": "integer",
        "label": "Images",
        "min": 1,
        "max": 4,
        "default": 1
      }
    ]
  },
  {
    "provider": "wavespeed",
    "params": [
      {
        "name": "prompt",
        "type": "text",
        "label": "Prompt",
        "required": true
      },
      {
        "name": "image_urls",
        "type": "images",
        "label": "Reference images",
        "description": "Optional — switches to image editing",
        "maxItems": 10
      },
      {
        "name": "aspect_ratio",
        "type": "enum",
        "label": "Aspect ratio",
        "options": [
          "1:1",
          "4:3",
          "3:4",
          "16:9",
          "9:16",
          "3:2",
          "2:3"
        ],
        "default": "1:1"
      },
      {
        "name": "quality",
        "type": "enum",
        "label": "Quality",
        "options": [
          "low",
          "medium",
          "high",
          "xhigh",
          "max"
        ],
        "default": "medium"
      },
      {
        "name": "num_images",
        "type": "integer",
        "label": "Images",
        "min": 1,
        "max": 4,
        "default": 1,
        "options": [
          1
        ]
      }
    ]
  },
  {
    "provider": "kie",
    "params": [
      {
        "name": "prompt",
        "type": "text",
        "label": "Prompt",
        "required": true
      },
      {
        "name": "image_urls",
        "type": "images",
        "label": "Reference images",
        "description": "Optional — switches to image editing",
        "maxItems": 10
      },
      {
        "name": "aspect_ratio",
        "type": "enum",
        "label": "Aspect ratio",
        "options": [
          "1:1",
          "4:3",
          "3:4",
          "16:9",
          "9:16",
          "3:2",
          "2:3"
        ],
        "default": "1:1"
      },
      {
        "name": "num_images",
        "type": "integer",
        "label": "Images",
        "min": 1,
        "max": 4,
        "default": 1,
        "options": [
          1
        ]
      }
    ]
  },
  {
    "provider": "vercel",
    "params": [
      {
        "name": "prompt",
        "type": "text",
        "label": "Prompt",
        "required": true
      },
      {
        "name": "image_urls",
        "type": "images",
        "label": "Reference images",
        "description": "Optional — switches to image editing",
        "maxItems": 10
      },
      {
        "name": "aspect_ratio",
        "type": "enum",
        "label": "Aspect ratio",
        "options": [
          "1:1",
          "4:3",
          "3:4",
          "16:9",
          "9:16",
          "3:2",
          "2:3"
        ],
        "default": "1:1"
      },
      {
        "name": "quality",
        "type": "enum",
        "label": "Quality",
        "options": [
          "low",
          "medium",
          "high",
          "xhigh",
          "max"
        ],
        "default": "medium"
      },
      {
        "name": "num_images",
        "type": "integer",
        "label": "Images",
        "min": 1,
        "max": 4,
        "default": 1
      }
    ]
  }
]
```

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