Source: https://01router.com/docs/models/ltx-2.5-pro/model-detail
Base URL: https://01router.com/api/v1

# LTX-2.5 Pro · Get one model

Model objects include slug, name, type, vendor, params and providers. Each provider supplies params, prices and billing for local frontend quotes using public fields.

`GET /api/v1/models/{slug}`

Public · No API key

## Where to find pricing data

GET /api/v1/models returns object=list and a data array. Each standard model has slug, params and providers. Select a channel from data[].providers[] and read its prices, params and billing. GET /api/v1/models/MODEL_SLUG returns the model object directly, without a data wrapper.

With the project query parameter, each data[] entry already selects a provider; prices, params and billing are directly on the model, with no providers array. Project prices[] contain only unit, conditions and priceMicros; billing.priceScope=project and creditsPerUsd=null. Read custom model names from this list; the model detail endpoint does not resolve project.

No API key is required. For cross-origin browser reads, use /api/v1/models: standard catalogs are public, while project catalogs follow configured domain restrictions. Catalogs are cached for 60 seconds. Prices below are illustrative; read current responses rather than hard-coding them. Quotes do not lock prices. See /docs/quote for the five billing methods.

## Model fields: icon and price range

Each model object also carries an icon and a price range for list views. The range is the lowest and highest per-unit price across all providers and price rules, with gateway pricing already applied. It is not a request total, and the two ends can use different units. For a quote, read the selected provider’s prices.

### data[]

| Field | Type | Meaning and use |
| --- | --- | --- |
| iconUrl | string \| null | Absolute URL of the model icon (SVG or WebP), or null when there is none. |
| iconMono | boolean | true when the icon is a single dark color; invert it on dark backgrounds. |
| fromMicros | number \| null | Lowest per-unit price in micro-USD across all providers; null when the model has no price. |
| maxMicros | number \| null | Highest per-unit price in micro-USD across all providers; null when the model has no price. |
| fromUnit / maxUnit | string \| null | Billing unit of fromMicros / maxMicros (request / second / image / kchar / input_token / output_token). Always show a price together with its unit. |
| fromOriginalMicros / maxOriginalMicros | number \| null | List price of the lowest / highest rule when it is discounted; null otherwise. Display only. |

### Usage notes

A project catalog (?project=) returns iconUrl, iconMono, fromMicros, fromUnit, maxMicros and maxUnit too, with the project ratio already applied. It does not return fromOriginalMicros or maxOriginalMicros.

## params: input definitions

Model params describe model-wide capabilities; provider params describe inputs actually supported by that channel. billing.modelParams and billing.upstreamParams use the same schema. The table describes one parameter object; optional fields may be absent from JSON.

### params[]

| Field | Type | Meaning and use |
| --- | --- | --- |
| name | string | Input field name, such as prompt, duration or num_images. |
| type | string | text / string: text; integer: whole number; number: numeric value; boolean: boolean; enum: enum value; image: one HTTP(S) image URL; images: an array of image URLs. |
| label / description | string | Optional display label and description; display name when absent. |
| required | boolean | Optional; defaults to false. A required value must not remain empty after applying defaults. |
| default | string \| number \| boolean | Optional default used for missing, null or empty-string input. Absence does not mean zero. |
| options | array | Optional allowed strings, numbers or booleans. For enum, select a listed value and preserve its type. |
| min / max | number | Optional inclusive numeric bounds. integer values must also be whole numbers. |
| maxItems | number | Optional maximum image count for an images parameter. |
| maxLength | number | Optional maximum text length measured by JavaScript string length. The overall limit is 10,000, also used when absent. |

### Usage notes

Prepare input: billing.version=1 is the current calculation contract; a nonempty billing.unavailableReason prevents quoting. Validate model input against billing.modelParams, then validate and apply defaults using the channel’s params types, required, default, options and min/max constraints. If billing.upstreamParams exists, its validated input and defaults are final. Ignore a field unsupported by the channel or upstream only when its value equals the model default; otherwise reject it. Derive mode as image or text from whether image/images fields in the final parameter definitions have a value; do not trust a user-supplied mode.

## prices: pricing rules

prices is an array of pricing rules, not a request total. Validate and apply input defaults before selecting a rule. For ordinary billing, derive quantity from unit and calculate round(priceMicros × quantity). Requests use 1, seconds use duration, images use num_images, and characters use the characterBilling-adjusted count divided by 1,000. Seconds and images each have a minimum of 1.

### prices[]

| Field | Type | Meaning and use |
| --- | --- | --- |
| unit | string | request / second / image / kchar / input_token / output_token: per request, second, image, thousand characters, million input tokens or million output tokens. |
| conditions | object | Condition names mapped to strings, numbers or booleans. An empty object is unconditional. For ordinary billing, match all conditions and prefer the most specific rule. For tokens, min_input_tokens is the input-length threshold, defaulting to 0. |
| priceMicros | number | Unit price in micro-USD; 1,000,000 = 1 USD. Gateway pricing is already applied, and project prices also include the resale ratio. Do not apply discounts or markups again. |
| originalMicros | number \| null | Comparison list unit price in the standard catalog; null means no discounted list price is available. Omitted in project catalogs. |
| credits | number | Rule-level display credits in the standard catalog, not a factor to multiply by request quantity. Calculate total credits from total dollars and billing.creditsPerUsd. Omitted in project catalogs. |

### Usage notes

For request, second, image and character billing, match every prices[].conditions entry against the final input, comparing values as strings. Choose the matching rule with the most conditions; keep response order for ties. For tokens, use the input-length tiers below.

Input and output have separate prices, each per 1,000,000 tokens. For each unit, choose the highest min_input_tokens threshold reached by the input token count; an omitted threshold is 0, and ties keep response order. The output price tier also depends on the input count.

Total micro-USD = ceil(input price × input tokens / 1,000,000 + output price × output tokens / 1,000,000). Add both costs before rounding up. Example: input price 1,000,000 and output price 2,000,000 micro-USD, with 1,000 input and 500 output tokens, costs $0.002. Token counts are not character counts; unknown output usage is only an estimate.

Above, round means rounding to integer micro-USD with Math.round; ceil means rounding up with Math.ceil. Dollars = total micro-USD / 1,000,000. When billing.creditsPerUsd is non-null, credits = max(1, ceil(dollars × creditsPerUsd - 1e-9)). The minimum is 1 credit; subtracting 1e-9 avoids extra credits from floating-point error. Example: $0.40 at 250 credits per dollar is 100 credits.

In the standard catalog example, the default duration is 5 seconds at 200,000 micro-USD per second: $1 total, or 250 credits at 250 credits per dollar. The rule’s display credits of 50 are not the total. The project example charges 240,000 micro-USD per second: $1.20 for 5 seconds. This is a resale price with no gateway credit total.

## billing: calculation and settlement

billing supplies calculation rules for each price source, without keys or upstream costs. Paths below are relative to billing. A missing optional object means that rule does not apply; do not invent character blocks or audio reservations.

### billing

| Field | Type | Meaning and use |
| --- | --- | --- |
| version | number | Currently 1. Calculation contract version, not a price lock. Stop quoting and refresh for an unsupported version. |
| priceScope | "gateway" \| "project" | gateway means gateway charges; project means resale display prices with the project ratio already applied. |
| creditsPerUsd | number \| null | Gateway credits per dollar. Null in project catalogs; do not infer gateway credits from resale prices. |
| modelParams | array | Model-level parameter definitions with the same schema as params[]. Validate input against these first. |
| upstreamParams | array | Optional final parameter definitions with the same schema as params[]. When present, validate and apply their defaults after provider validation. |
| characterBilling | object | Optional character rules. Without them, count prompt using JavaScript string length, with a minimum of 1 character and no automatic rounding to whole thousands. |
| characterBilling.fields | string[] | Input field names whose lengths are summed; returned within characterBilling. Missing input contributes an empty string. |
| characterBilling.minimum | number | Minimum billable character count, returned within characterBilling. |
| characterBilling.block | number | Optional block size: round characters up to its multiple before applying minimum. Omitted or zero means no block rounding. |
| metering | object | Optional metered audio settings. The pre-generation quote is a token-based reservation; final settlement can differ. |
| metering.outputTokenHold | number | Reserved output token count, returned within metering. |
| metering.providerCost | boolean | When true, final cost requires a provider report and cannot be inferred from public unit prices alone. Omitted or false means settlement uses actual token counts. |
| unavailableReason | string | Optional reason this configuration cannot be quoted. When nonempty, stop calculating and show the reason, not a free price. |

### Usage notes

Audio reservation: when billing.metering exists, estimate input tokens as the UTF-8 byte length of prompt concatenated with style_instructions plus 256, and use outputTokenHold for output tokens. Apply the token formula to reserve funds. Final settlement uses actual usage; providerCost=true requires the provider’s cost report.

Project prices: billing.priceScope=project means unit prices already include the resale ratio; do not apply it again. billing.creditsPerUsd=null, so these prices cannot determine gateway credits. POST /quote returns gateway prices and credits even with project supplied; it excludes project resale markup.

Consistency: these rules match backend calculations for the same price configuration, pinned provider and input. Catalogs are cached for 60 seconds; refresh after price changes. Frontend estimates do not lock prices. Routing also considers availability, priority and circuit breakers, so a local minimum is not a guaranteed charge. Invalid input, unsupported versions or missing prices must show an unavailable quote, not a free price.

## Input parameters

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| slug | string · path | yes | Model slug from the catalog. Project keys may use a project-specific model slug. | options: [   "ltx-2.5-pro" ] |

## Response fields

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| slug | string | — | Model slug from the catalog. Project keys may use a project-specific model slug. |  |
| params | array | — | Parameter definitions: name, type, required, default, options, min, max, maxItems and maxLength when configured. |  |
| providers | array | — | Available providers with their parameter constraints and public price tiers. |  |
| iconUrl | string \| null | — | Absolute URL of the model icon (SVG or WebP), or null when there is none. |  |
| iconMono | boolean | — | true when the icon is a single dark color; invert it on dark backgrounds. |  |

## cURL

```bash
curl 'https://01router.com/api/v1/models/ltx-2.5-pro'
```

## 200 · application/json

```json
{
  "slug": "ltx-2.5-pro",
  "name": "LTX-2.5 Pro",
  "type": "video",
  "vendor": "Lightricks",
  "description": "Lightricks LTX-2.5 Pro: higher-fidelity LTX with audio and first/last frame, 6–10 s, 720p/1080p.",
  "tags": [
    "text-to-video",
    "image-to-video",
    "audio"
  ],
  "coverUrl": "",
  "iconUrl": "https://01router.com/models/lightricks.svg",
  "iconMono": true,
  "params": [
    {
      "name": "prompt",
      "type": "text",
      "label": "Prompt",
      "required": true
    },
    {
      "name": "image_url",
      "type": "image",
      "label": "First frame",
      "description": "Optional start image (image-to-video)"
    },
    {
      "name": "end_image_url",
      "type": "image",
      "label": "Last frame"
    },
    {
      "name": "duration",
      "type": "enum",
      "label": "Duration (s)",
      "options": [
        6,
        8,
        10
      ],
      "default": 6
    },
    {
      "name": "resolution",
      "type": "enum",
      "label": "Resolution",
      "options": [
        "720p",
        "1080p"
      ],
      "default": "1080p"
    },
    {
      "name": "aspect_ratio",
      "type": "enum",
      "label": "Aspect ratio",
      "options": [
        "16:9",
        "9:16"
      ],
      "default": "16:9"
    },
    {
      "name": "generate_audio",
      "type": "boolean",
      "label": "Generate audio",
      "default": true
    }
  ],
  "providers": [
    {
      "provider": "fal",
      "providerName": "fal.ai",
      "discount": 90,
      "preferred": false,
      "params": [
        {
          "name": "prompt",
          "type": "text",
          "label": "Prompt",
          "required": true
        },
        {
          "name": "image_url",
          "type": "image",
          "label": "First frame",
          "description": "Optional start image (image-to-video)"
        },
        {
          "name": "end_image_url",
          "type": "image",
          "label": "Last frame"
        },
        {
          "name": "duration",
          "type": "enum",
          "label": "Duration (s)",
          "options": [
            6,
            8,
            10
          ],
          "default": 6
        },
        {
          "name": "resolution",
          "type": "enum",
          "label": "Resolution",
          "options": [
            "720p",
            "1080p"
          ],
          "default": "1080p"
        },
        {
          "name": "aspect_ratio",
          "type": "enum",
          "label": "Aspect ratio",
          "options": [
            "16:9",
            "9:16"
          ],
          "default": "16:9"
        },
        {
          "name": "generate_audio",
          "type": "boolean",
          "label": "Generate audio",
          "default": true
        }
      ],
      "billing": {
        "version": 1,
        "priceScope": "gateway",
        "creditsPerUsd": 100,
        "modelParams": [
          {
            "name": "prompt",
            "type": "text",
            "label": "Prompt",
            "required": true
          },
          {
            "name": "image_url",
            "type": "image",
            "label": "First frame",
            "description": "Optional start image (image-to-video)"
          },
          {
            "name": "end_image_url",
            "type": "image",
            "label": "Last frame"
          },
          {
            "name": "duration",
            "type": "enum",
            "label": "Duration (s)",
            "options": [
              6,
              8,
              10
            ],
            "default": 6
          },
          {
            "name": "resolution",
            "type": "enum",
            "label": "Resolution",
            "options": [
              "720p",
              "1080p"
            ],
            "default": "1080p"
          },
          {
            "name": "aspect_ratio",
            "type": "enum",
            "label": "Aspect ratio",
            "options": [
              "16:9",
              "9:16"
            ],
            "default": "16:9"
          },
          {
            "name": "generate_audio",
            "type": "boolean",
            "label": "Generate audio",
            "default": true
          }
        ]
      },
      "prices": [
        {
          "unit": "second",
          "conditions": {
            "resolution": "720p"
          },
          "priceMicros": 108000,
          "originalMicros": 120000,
          "credits": 11
        },
        {
          "unit": "second",
          "conditions": {
            "resolution": "1080p"
          },
          "priceMicros": 153000,
          "originalMicros": 170000,
          "credits": 16
        }
      ]
    },
    {
      "provider": "atlascloud",
      "providerName": "AtlasCloud",
      "discount": 90,
      "preferred": false,
      "params": [
        {
          "name": "prompt",
          "type": "text",
          "label": "Prompt",
          "required": true
        },
        {
          "name": "image_url",
          "type": "image",
          "label": "First frame",
          "description": "Optional start image (image-to-video)"
        },
        {
          "name": "end_image_url",
          "type": "image",
          "label": "Last frame"
        },
        {
          "name": "duration",
          "type": "enum",
          "label": "Duration (s)",
          "options": [
            6,
            8,
            10
          ],
          "default": 6
        },
        {
          "name": "resolution",
          "type": "enum",
          "label": "Resolution",
          "options": [
            "720p",
            "1080p"
          ],
          "default": "1080p"
        },
        {
          "name": "aspect_ratio",
          "type": "enum",
          "label": "Aspect ratio",
          "options": [
            "16:9",
            "9:16"
          ],
          "default": "16:9"
        },
        {
          "name": "generate_audio",
          "type": "boolean",
          "label": "Generate audio",
          "default": true
        }
      ],
      "billing": {
        "version": 1,
        "priceScope": "gateway",
        "creditsPerUsd": 100,
        "modelParams": [
          {
            "name": "prompt",
            "type": "text",
            "label": "Prompt",
            "required": true
          },
          {
            "name": "image_url",
            "type": "image",
            "label": "First frame",
            "description": "Optional start image (image-to-video)"
          },
          {
            "name": "end_image_url",
            "type": "image",
            "label": "Last frame"
          },
          {
            "name": "duration",
            "type": "enum",
            "label": "Duration (s)",
            "options": [
              6,
              8,
              10
            ],
            "default": 6
          },
          {
            "name": "resolution",
            "type": "enum",
            "label": "Resolution",
            "options": [
              "720p",
              "1080p"
            ],
            "default": "1080p"
          },
          {
            "name": "aspect_ratio",
            "type": "enum",
            "label": "Aspect ratio",
            "options": [
              "16:9",
              "9:16"
            ],
            "default": "16:9"
          },
          {
            "name": "generate_audio",
            "type": "boolean",
            "label": "Generate audio",
            "default": true
          }
        ]
      },
      "prices": [
        {
          "unit": "second",
          "conditions": {
            "resolution": "720p"
          },
          "priceMicros": 118800,
          "originalMicros": 132000,
          "credits": 12
        },
        {
          "unit": "second",
          "conditions": {
            "resolution": "1080p"
          },
          "priceMicros": 168300,
          "originalMicros": 187000,
          "credits": 17
        }
      ]
    }
  ],
  "fromMicros": 108000,
  "fromOriginalMicros": 120000,
  "fromUnit": "second",
  "maxMicros": 168300,
  "maxOriginalMicros": 187000,
  "maxUnit": "second"
}
```

## Token provider fragment (one standard providers[] entry)

```json
{
  "provider": "example-chat",
  "providerName": "Example chat",
  "discount": null,
  "preferred": false,
  "params": [],
  "prices": [
    {
      "unit": "input_token",
      "conditions": {
        "min_input_tokens": 0
      },
      "priceMicros": 1000000,
      "originalMicros": null,
      "credits": 250
    },
    {
      "unit": "output_token",
      "conditions": {
        "min_input_tokens": 0
      },
      "priceMicros": 2000000,
      "originalMicros": null,
      "credits": 500
    },
    {
      "unit": "input_token",
      "conditions": {
        "min_input_tokens": 100000
      },
      "priceMicros": 2000000,
      "originalMicros": null,
      "credits": 500
    },
    {
      "unit": "output_token",
      "conditions": {
        "min_input_tokens": 100000
      },
      "priceMicros": 4000000,
      "originalMicros": null,
      "credits": 1000
    }
  ],
  "billing": {
    "version": 1,
    "priceScope": "gateway",
    "creditsPerUsd": 250,
    "modelParams": []
  }
}
```

## Character provider fragment (one standard providers[] entry)

```json
{
  "provider": "example-speech",
  "providerName": "Example speech",
  "discount": null,
  "preferred": false,
  "params": [
    {
      "name": "prompt",
      "type": "text",
      "required": true,
      "maxLength": 10000
    },
    {
      "name": "style_instructions",
      "type": "string",
      "default": "",
      "maxLength": 1000
    }
  ],
  "prices": [
    {
      "unit": "kchar",
      "conditions": {},
      "priceMicros": 100000,
      "originalMicros": null,
      "credits": 1
    }
  ],
  "billing": {
    "version": 1,
    "priceScope": "gateway",
    "creditsPerUsd": 250,
    "modelParams": [
      {
        "name": "prompt",
        "type": "text",
        "required": true,
        "maxLength": 10000
      },
      {
        "name": "style_instructions",
        "type": "string",
        "default": "",
        "maxLength": 1000
      }
    ],
    "characterBilling": {
      "fields": [
        "prompt",
        "style_instructions"
      ],
      "minimum": 1000,
      "block": 1000
    }
  }
}
```

## Audio reservation fragment (one standard providers[] entry)

```json
{
  "provider": "example-audio",
  "providerName": "Example audio",
  "discount": null,
  "preferred": false,
  "params": [
    {
      "name": "prompt",
      "type": "text",
      "required": true,
      "maxLength": 10000
    },
    {
      "name": "style_instructions",
      "type": "string",
      "default": "",
      "maxLength": 1000
    }
  ],
  "prices": [
    {
      "unit": "input_token",
      "conditions": {
        "min_input_tokens": 0
      },
      "priceMicros": 1000000,
      "originalMicros": null,
      "credits": 250
    },
    {
      "unit": "output_token",
      "conditions": {
        "min_input_tokens": 0
      },
      "priceMicros": 2000000,
      "originalMicros": null,
      "credits": 500
    }
  ],
  "billing": {
    "version": 1,
    "priceScope": "gateway",
    "creditsPerUsd": 250,
    "modelParams": [
      {
        "name": "prompt",
        "type": "text",
        "required": true,
        "maxLength": 10000
      },
      {
        "name": "style_instructions",
        "type": "string",
        "default": "",
        "maxLength": 1000
      }
    ],
    "upstreamParams": [
      {
        "name": "prompt",
        "type": "text",
        "required": true,
        "maxLength": 10000
      },
      {
        "name": "style_instructions",
        "type": "string",
        "default": "",
        "maxLength": 1000
      }
    ],
    "metering": {
      "outputTokenHold": 1000,
      "providerCost": false
    }
  }
}
```