LTX-2.5 Fast API

Lightricks LTX-2.5 Fast: real-time speed with audio, 6–20 s, up to native 4K.

Lightricks·视频可用

低至$0.027/ 秒$0.03省 10%

模型 IDltx-2.5-fast

text-to-videoimage-to-videoaudio4k

输入

文本 · 图片

输出

视频

供应商

3 家供应商

Duration (s)

6 · 8 · 10 · 12 · 14 · 16 · 18 · 20

Resolution

720p · 1080p · 1440p · 2160p

Aspect ratio

16:9 · 9:16

近 7 天表现 · 近期请求较少,暂无统计数据。

LTX-2.5 Fast 价格

价格按单位计费;未指定供应商时,会路由到支持该参数组合且价格最低的供应商。

规格720p1080p1440p2160p
全部规格
$0.027 / 秒
3 积分$0.03省 10%
$0.054 / 秒
6 积分$0.06省 10%
$0.108 / 秒
11 积分$0.12省 10%
$0.216 / 秒
22 积分$0.24省 10%

接入前先试用 LTX-2.5 Fast

写代码之前,先测试生成效果、对比各供应商价格并预估费用。

供应商
视频
预计费用

输入

prompt
image_url
end_image_url
duration
resolution
aspect_ratio
generate_audio

结果

空闲
生成结果会显示在这里。

本次请求的各供应商报价

输入提示词即可对比各供应商价格。

LTX-2.5 Fast 提示词示例

可直接使用的提示词,一键载入 Playground 再调整。

来源
场景分类

共 9 条提示词

A lateral tracking shot glides past a row of industrial presses in a cavernous steel mill. A welder's arc erupts in the mid-ground, throwing hard blue-white light and a shower of sparks that arc and die on the concrete floor. Overhead sodium lamps cut hazy orange cones through smoke. Silhouetted workers cross the frame in the foreground. High-contrast mixed color temperature, heavy atmospheric particulate, gritty texture, slow-motion spark trails, hard industrial realism.

A lone futuristic detective walks through a rain-soaked megacity at night, surrounded by towering brutalist skyscrapers, enormous holographic advertisements, flying vehicles and endless neon signs. Heavy rain falls through dense volumetric fog, steam rises from underground vents, pedestrians move like silhouettes through the glowing streets. The detective's face is partially illuminated by cyan neon while warm amber light flickers from nearby shops. Wet pavement creates endless reflections. The camera slowly tracks backward as he walks toward the lens, subtle handheld movement, shallow depth of field, anamorphic lens flare, realistic rain on the lens, cinematic chiaroscuro, deep shadows, atmospheric perspective, restrained cyberpunk aesthetic, futuristic film noir, melancholic and mysterious storytelling, photorealistic, premium cinematic VFX, 35mm film grain,

A lone futuristic detective walks through a rain-soaked megacity at night, surrounded by towering brutalist skyscrapers, enormous holographic advertisements, flying vehicles and endless neon signs. Heavy rain falls through dense volumetric fog, steam rises from underground vents, pedestrians move like silhouettes through the glowing streets. The detective's face is partially illuminated by cyan neon while warm amber light flickers from nearby shops. Wet pavement creates endless reflections. The camera slowly tracks backward as he walks toward the lens, subtle handheld movement, shallow depth of field, anamorphic lens flare, realistic rain on the lens, cinematic chiaroscuro, deep shadows, atmospheric perspective, restrained cyberpunk aesthetic, futuristic film noir, melancholic and mysterious storytelling, photorealistic, premium cinematic VFX, 35mm film grain,

A slow lateral tracking shot glides through old-growth pines, following a large brown bear as it moves along a shallow river bank, the camera drifting with it in parallel. Low morning sun cuts sideways through the trunks in hard parallel shafts, backlighting the bear's fur into a bright rim of gold against deep shadow; its breath clouds in the cold air with every step. Suspended mist and pollen turn slowly in the light beams. The bear pauses, lowers its head toward the water, then moves on. Telephoto compression, shallow depth of field, pine trunks sliding through the foreground, high dynamic range, cool green shadows against warm highlights, natural wildlife cinematography, 35mm film grain. Sound: shallow water running over stones, wind high in the pines, wet gravel underfoot, distant birdsong.

Sideways tracking shot past heavy presses in a steel mill, a welding arc throwing blue-white sparks in slow motion, sodium lamps cutting through smoke, workers passing in silhouette, gritty realism.

LTX-2.5 Fast API 文档

该模型的接口、请求字段与可直接运行的调用示例。

Base URL

https://01router.com/api/v1
llms.txt

快速开始

将 API_KEY 设为项目密钥,在服务端运行示例。示例中的媒体地址需替换为您自己的公开地址。

自动路由会选择支持当前请求的供应商。选择指定供应商,可查看它的参数约束和调用示例。

curl https://01router.com/api/v1/generations \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'JSON'
{
  "model": "ltx-2.5-fast",
  "input": {
    "prompt": "A cinematic shot of a red fox running through snow",
    "duration": 6,
    "resolution": "1080p",
    "aspect_ratio": "16:9",
    "generate_audio": true
  }
}
JSON

# Replace GENERATION_ID with the id returned above; poll until status is "succeeded" or "failed"
curl https://01router.com/api/v1/generations/GENERATION_ID -H "Authorization: Bearer $API_KEY"

接口列表

这里只列出当前模型相关的接口,路径已包含 /api/v1。点击接口可跳转到使用说明。

鉴权

以 Bearer Token 方式发送 API Key,费用从 Key 所属账户的积分中扣除。

Authorization: Bearer YOUR_API_KEY
Content-Type: application/json
获取 API Key

输入参数

使用 Content-Type: application/json 发送请求。模型参数放在 input 中,model、provider、callback_url 放在最外层。

请求体

参数名类型必填说明
modelstring是"ltx-2.5-fast"
providerstring否指定供应商;不传则自动路由到最便宜的。可选: fal | replicate | atlascloud
inputobject是模型参数,字段见下方 input 字段表。
callback_urlstring否可选的公开 HTTPS 回调地址,接收带签名的任务最终结果;仍可通过查询接口获取状态。

input · input 字段

必填字段已明确标记,其他字段省略时使用所列默认值。

参数名类型必填可选值默认值
prompt*string是——
image_url
Optional start image (image-to-video)
string否——
end_image_urlstring否——
durationnumber否6 | 8 | 10 | 12 | 14 | 16 | 18 | 206
resolutionstring否720p | 1080p | 1440p | 2160p1080p
aspect_ratiostring否16:9 | 9:1616:9
generate_audioboolean否—true
任务回调 →

输出结果

创建任务成功不代表生成完成。保存 id,查询到 succeeded 或 failed 后,读取 outputs 或 error。示例金额仅作说明,实际费用由请求决定。

queued→processing→succeeded / failed

提交后的响应

{
  "id": "gen_example",
  "object": "generation",
  "model": "ltx-2.5-fast",
  "type": "video",
  "provider": "fal",
  "status": "processing",
  "input": {
    "prompt": "A cinematic shot of a red fox running through snow",
    "duration": 6,
    "resolution": "1080p",
    "aspect_ratio": "16:9",
    "generate_audio": true
  },
  "outputs": [],
  "error": null,
  "credits": 0,
  "price_usd": 0,
  "created_at": "2026-10-25T08:00:00.000Z",
  "completed_at": null
}

完成后的响应

{
  "id": "gen_example",
  "object": "generation",
  "model": "ltx-2.5-fast",
  "type": "video",
  "provider": "fal",
  "status": "succeeded",
  "input": {
    "prompt": "A cinematic shot of a red fox running through snow",
    "duration": 6,
    "resolution": "1080p",
    "aspect_ratio": "16:9",
    "generate_audio": true
  },
  "outputs": [
    "https://example.com/output.mp4"
  ],
  "error": null,
  "credits": 0,
  "price_usd": 0,
  "created_at": "2026-10-25T08:00:00.000Z",
  "completed_at": "2026-10-25T08:01:00.000Z"
}

响应字段

参数名类型必填说明
idstring是任务 ID,用于查询或取消任务。
objectstring是generation
modelstring是ltx-2.5-fast
typestring是video
providerstring是供应商
statusstring是queued → processing → succeeded / failed。进入任一终态后停止轮询。
inputobject是模型参数,字段见下方 input 字段表。
outputsstring[]是结果文件 URL 数组。处理中为空;成功后读取并及时下载保存。
errorstring | null是失败原因;无错误时为 null。
creditsnumber是本次请求扣除的积分。
price_usdnumber是本次请求的美元价格。
created_atstring是ISO 8601 格式的任务创建时间。
completed_atstring | null是ISO 8601 格式的完成时间;未完成时为 null。

获取结果

每隔几秒轮询,直到 status 为 succeeded 或 failed。输出链接由供应商托管,可能过期,请及时下载保存;也可以传 callback_url 接收推送。

curl "https://01router.com/api/v1/generations/GENERATION_ID" \
  -H "Authorization: Bearer $API_KEY"

queued → processing → succeeded / failed。进入任一终态后停止轮询。 结果文件 URL 数组。处理中为空;成功后读取并及时下载保存。

取消任务

取消取决于供应商支持情况和任务状态。确认取消后返回 status: failed、error: Canceled by user;不支持取消或已完成的任务返回 409 not_cancelable。

curl -X POST "https://01router.com/api/v1/generations/GENERATION_ID/cancel" \
  -H "Authorization: Bearer $API_KEY"

报价

请求体与创建任务相同。返回按价格排序的可用供应商,以及无法处理该请求的供应商及原因。

curl "https://01router.com/api/v1/quote" -H "Content-Type: application/json" --data-binary @- <<'JSON'
{
  "model": "ltx-2.5-fast",
  "input": {
    "prompt": "A cinematic shot of a red fox running through snow",
    "duration": 6,
    "resolution": "1080p",
    "aspect_ratio": "16:9",
    "generate_audio": true
  }
}
JSON

模型信息与参数

此公开接口返回模型参数,以及各供应商支持的参数约束和价格。

curl "https://01router.com/api/v1/models/ltx-2.5-fast"

错误码

结合 HTTP 状态码和 error.message 排查。参数或认证错误需修正后再重试;生成任务失败则通过任务本身的 status 和 error 返回。

{
  "error": {
    "message": "Invalid or missing API key",
    "code": "unauthorized"
  }
}

400请求体或参数取值不合法

401缺少或无效的 API Key

402积分不足

404模型或任务不存在

409任务无法取消(已结束,或该供应商不支持取消)

429请求过于频繁,请稍后重试

502所有供应商都拒绝了任务(积分已退回)

鉴权、路由、计费与错误码详见 →

交给 AI 使用

将本模型文档交给编程助手:纯文本包含接口、输入约束、输出字段和请求示例。

打开 llms.txt

LTX-2.5 Fast 与同类模型对比

并排对比规格与起步价,选择前建议用同一提示词实测。

LTX-2.5 FastGrok Imagine Video 1.5Seedance 2.5Grok Imagine Video 1.5 Lite
厂商LightricksxAIByteDancexAI
起步价$0.027 / 秒$0.011 / 秒$0.086 / 秒$0.013 / 秒
输入文本 · 图片文本 · 图片文本 · 图片文本 · 图片
供应商3 家供应商10 家供应商9 家供应商6 家供应商
Duration (s)6 · 8 · 10 · 12 · 14 · 16 · 18 · 201 – 154 – 301 – 15
Resolution720p · 1080p · 1440p · 2160p480p · 720p · 1080p480p · 720p · 1080p480p · 720p · 1080p
Aspect ratio16:9 · 9:1616:9 · 4:3 · 3:2 · 1:1 · 2:3 · 3:4 · 9:1616:9 · 9:16 · 1:1 · 4:3 · 3:4 · 21:916:9 · 4:3 · 3:2 · 1:1 · 2:3 · 3:4 · 9:16

LTX-2.5 Fast API 常见问题

LTX-2.5 Fast 适合做什么?

Lightricks 的速度优化版本,适合快速迭代、预览和大批量生成,最高支持 4K,并自带音频。

支持哪些时长?

6 到 20 秒,以 2 秒为步长。超过 10 秒的视频只能用 720p 或 1080p。

支持哪些分辨率和比例?

720p、1080p、1440p 和 2160p(4K),比例只有 16:9 和 9:16。

提示词怎么写?

用一段现在时的描述,写清楚运镜和光线,多用动作动词。描述越具体详细,效果通常越好。

在 01router 上怎么计费?

按输出秒数和分辨率计费,音频包含在内,详见价格表。生成失败会退还积分。

相关模型

同一个 API Key 即可调用的其他模型。