Source: https://ailoot.ai/models/en/google-veo-3-1-lite/ Canonical: https://ailoot.ai/models/en/google-veo-3-1-lite/ Language: en # Google: Veo 3.1 Lite [Markdown](https://ailoot.ai/models/en/google-veo-3-1-lite/index.md) · [JSON](https://ailoot.ai/models/en/google-veo-3-1-lite/facts.json) ## [Google: Veo 3.1 Lite](https://ailoot.ai/models/en/google-veo-3-1-lite/) Veo 3.1 Lite generates a video with native audio from a text description or an initial image. Its documented Lite workflow produces one clip, with 4-, 6- or 8-second durations, landscape or portrait framing, and specific limits that differ from Veo 3.1 and Fast. - [**Ailoot Ultra · Video** `POST /v1/videos` `google/veo-3.1-lite`](https://ailoot.ai/models/en/google-veo-3-1-lite/#method-0) About the model This description covers the model’s capabilities. Available in Ailoot inputs, outputs and options are listed for the selected method below. Veo 3.1 Lite is Google’s Lite member of the Veo 3 video-generation line. It synthesizes a video with audio from a natural-language description or an input image. The output is a generated clip, not a textual analysis of an existing recording. The maker’s Lite model card refers to Veo 3 for the underlying architecture, training material and known limitations, while the Lite-specific documentation defines its own generation features and limits. The referenced architecture uses latent diffusion over temporal audio representations and spatio-temporal video representations. The base model was trained on audio, video and images, with captions at different levels of detail, and filtered and deduplicated training material. This explains the joined visual-and-audio generation purpose. It does not disclose a Lite-specific parameter count or establish that every generated movement follows physical reality. For a practical scene, decide the visible action and the corresponding sound together. The exact Lite documentation gives a text-input limit of 1,024 tokens and one output video. The Lite column in the generation guide lists 4-, 6- and 8-second durations, with 720p as the default and 1080p requiring an 8-second clip. Landscape 16:9 is the default aspect ratio and portrait 9:16 is also listed; output is documented at 24 frames per second. Native audio is always on in that flow. These values belong to the producer’s named Lite workflow, not to an unrelated Veo edition or a separately measured application response. Lite does not support 4K output or video extension. The parameter table also marks the multi-reference referenceImages feature and a video input for extension as unavailable in the Lite column. An initial image can establish the starting frame; the table lists a lastFrame image together with that initial image for a transition. Keep this frame-control path distinct from mixing several style or subject references. The producer’s people-generation settings are mode-specific: the Lite table lists allow\_all for text-to-video and allow\_adult for image-to-video and interpolation, while regional rules can further restrict that documented profile. Choose the starting image to match the first scene you actually want, with the subject, framing and visible details prepared before asking for motion. For text-to-video, describe the subject, its action, the environment and the intended style. Add camera position and movement, framing, focus and light when they matter. An original product scene could keep the object centered while the camera approaches one material detail and the surrounding light changes gently. Identify the initial state, the main action and the final moment so the short clip resolves one coherent idea. A lengthy collection of unrelated actions is a different task from a focused shot. For image-to-video, provide a clear initial frame and explain what should move and what should remain stable. Specify the subject’s motion and any camera movement separately. If using a final-frame constraint, prepare a compatible end composition and describe the transition between them. Inspect the result rather than assuming that a requested identity, position or shape remains identical throughout the clip. The referenced model card identifies complete consistency in complex scenes and complex motion as a continuing challenge. The prompt guide supports explicit cues for dialogue, sound effects and ambience. Put exact speech in quotation marks, identify the speaker and describe sounds in relation to the visible action. A sound effect and background atmosphere should not be confused with a spoken line. English is documented as fully supported for prompting, while other languages have not been evaluated in that guide. Review the audible words, timing and sound quality as part of the same artifact as the video rather than treating audio as a guaranteed faithful transcript of the prompt. The producer workflow is asynchronous: a generation request returns an operation, and the completed result is obtained after its status reports completion. Keep the operation identity and inspect the returned clip. The guide describes two-day producer-side retention and SynthID marking, so a retained artifact should include the downloaded result, prompt, source images and selected settings. A seed can improve repeatability but does not guarantee determinism. Check subject continuity, action, framing, sound and the intended endpoint of the scene before using the clip in an edit; processing completion alone is not proof that the creative requirements were met. **Ailoot Ultra · Video** `POST /v1/videos` `google/veo-3.1-lite` [`google/veo-3.1-lite`](https://ailoot.ai/models/en/#m=google%2Fveo-3.1-lite&route=Ultra&caller=google%2Fveo-3.1-lite&fmt=videos) Google /`google/veo-3.1-lite` ### Overview Turn a scene description into a 4-, 6- or 8-second video at 720p. - Show a product in motion - Create an establishing scene - Try a short camera move Accepted inputs Text · Images Results Video ### Available in Ailoot · inputs & methods **Ailoot Ultra · Video** `POST /v1/videos` Input types `text`, `image` Output types `video` Output format mp4 Output count Up to 4 outputs | Field | Type | Requirement | Values & limits | Default | | --- | --- | --- | --- | --- | | Field`model` | Type`string` | RequirementRequired | Values & limits google/veo-3.1-lite | Default— | | Field`prompt` | Type`string` | RequirementRequired | Values & limits Minimum length: 1 Maximum bytes: 10,000 Unit: UTF8bytes | Default— | | Field`duration` | Type`integer` | RequirementRequired | Values & limits 4, 6, 8 Unit: seconds | Default— | | Field`resolution` | Type`string` | RequirementRequired | Values & limits 720p | Default— | | Field`aspect_ratio` | Type`string` | RequirementRequired | Values & limits 16:9, 9:16 | Default— | | Field`generate_audio` | Type`boolean` | RequirementRequired | Values & limits false | Default— | | Field`frame_images` | Type`array` | RequirementOptional | Values & limits Conditions: Omit for text\_to\_video. When present: exactly one item {"type":"image\_url","image\_url":{"url":"\"},"frame\_type":"first\_frame"}; item has exactly type,image\_url,frame\_type; image\_url has exactly url. No extra or duplicate keys. Only duration=4,resolution="720p",aspect\_ratio="16:9",generate\_audio=false. URL must parse with scheme https, nonempty hostname, no userinfo and no literal #; signed query and encoded path preserved. Source checks no input MIME, file size or pixel dimensions. | Default— | Input material combinations **Text to video** · Required: prompt **Image to video** · Required: prompt, frame\_images Method parameters and lifecycle | Parameter | Contract | | --- | --- | | Parameter`content_type` | Contractapplication/json | | Parameter`required` | Contractmodel, prompt, duration, resolution, aspect\_ratio, generate\_audio | | Parameter`other_options` | Contractfalse | | Parameter`resolution` | Contract720p | | Parameter`prompt_max_bytes` | Contract10000 | | Parameter`duration` | Contract4, 6, 8 | | Parameter`aspect_ratio` | Contract16:9, 9:16 | | Parameter`generate_audio` | Contractfalse | | Parameter`material_types` | Contracttext, image | | Parameter`parameters` | Contract{"name":"model","type":"string","required":true,"default\_known":false,"default":null,"enum\_known":true,"enum":\["google/veo-3.1-lite"\],"availability":"source\_interface"}, {"name":"prompt","type":"string","required":true,"default\_known":false,"default":null,"enum\_known":false,"enum":null,"availability":"source\_interface","min\_length":1,"maximum\_bytes":10000,"maximum\_length":null,"unit":"UTF8bytes"}, {"name":"duration","type":"integer","required":true,"default\_known":false,"default":null,"enum\_known":true,"enum":\[4,6,8\],"availability":"source\_interface","unit":"seconds"}, {"name":"resolution","type":"string","required":true,"default\_known":false,"default":null,"enum\_known":true,"enum":\["720p"\],"availability":"source\_interface"}, {"name":"aspect\_ratio","type":"string","required":true,"default\_known":false,"default":null,"enum\_known":true,"enum":\["16:9","9:16"\],"availability":"source\_interface"}, {"name":"generate\_audio","type":"boolean","required":true,"default\_known":false,"default":null,"enum\_known":true,"enum":\[false\],"availability":"source\_interface"}, {"name":"frame\_images","type":"array","required":false,"default\_known":false,"default":null,"enum\_known":false,"enum":null,"availability":"source\_interface","conditions":"Omit for text\_to\_video. When present: exactly one item {\\"type\\":\\"image\_url\\",\\"image\_url\\":{\\"url\\":\\"\\\"},\\"frame\_type\\":\\"first\_frame\\"}; item has exactly type,image\_url,frame\_type; image\_url has exactly url. No extra or duplicate keys. Only duration=4,resolution=\\"720p\\",aspect\_ratio=\\"16:9\\",generate\_audio=false. URL must parse with scheme https, nonempty hostname, no userinfo and no literal #; signed query and encoded path preserved. Source checks no input MIME, file size or pixel dimensions."} | Method aliases: `/v1/videos/generations`, `/videos`, `/videos/generations` Lifecycle: `submit_once_poll_original` `GET /v1/videos/{request_id}` `GET /v1/videos/generations/{request_id}` `GET /v1/videos/{request_id}/content` `GET /v1/videos/generations/{request_id}/content` Create once and save returned ID. Poll original status; retain every completed asset and duration. ### Pricing ##### How the final charge is calculated The displayed rates estimate the cost before generation. The final charge is calculated from the cost recorded for the original generation. Measured output duration and forecast quantities are not the final billable quantity. Tariff references do not add request options. Supported parameters are listed for the selected method. Fast mode Not specified When fast mode is selected Flex mode Not specified When flex mode is selected Maximum reasoning effort Not specified When maximum reasoning effort uses the default adjustment #### Estimated rates for comparison #### Prices by configuration Match each charge to the conditions shown. Use one rate for each set of alternative configurations. | Configuration | Rate schedule | Forecast quantity | Generate audio | Resolution | Billing unit | Billing conditions | Charge | | --- | --- | --- | --- | --- | --- | --- | --- | | ConfigurationBase token rates | Rate scheduleBase rate | Forecast quantity— | Generate audio— | Resolution— | Billing unit— | Billing conditions— | Charge Input · Input tokens · Estimate for comparison only **—** / 1K tokens Output · Output tokens · Estimate for comparison only **—** / 1K tokens Input · Cache read · Estimate for comparison only **—** / 1K tokens Input · Cache write · Estimate for comparison only **—** / 1K tokens Input · Cache write, 1 hour · Estimate for comparison only **—** / 1K tokens | | ConfigurationVideo price | Rate schedule— | Forecast quantity— | Generate audio— | Resolution— | Billing unitper video second | Billing conditionsaudio: with\_audio | Charge Output · Video price · Estimate for comparison only **$0.16** per video second | | ConfigurationVideo price | Rate schedule— | Forecast quantity— | Generate audio— | Resolution— | Billing unitper video second | Billing conditionsaudio: with\_audio; resolution: 720p | Charge Output · Video price · Estimate for comparison only **$0.1** per video second | | ConfigurationVideo price | Rate schedule— | Forecast quantity— | Generate audio— | Resolution— | Billing unitper video second | Billing conditionsaudio: without\_audio | Charge Output · Video price · Estimate for comparison only **$0.1** per video second | | ConfigurationUltra | Rate schedule— | Forecast quantityRequested configuration; estimate only. | Generate audioWithout audio | Resolution720p | Billing unitper output video second | Billing conditions— | Charge Output · Estimated output video second · Estimate for comparison only **$0.06** per output video second The displayed rate estimates the cost before generation. The final charge is calculated from the cost recorded for the original generation. Physical video duration is not the billable quantity. | | ConfigurationEstimated generation cost | Rate schedule— | Forecast quantityone generation estimate | Generate audio— | Resolution— | Billing unit— | Billing conditions— | Charge Output · Estimated generation cost · Estimate for comparison only **$0.24** estimate before generation This estimate is not an additional charge or a fixed rate for the completed generation. | Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/) #### Reference tariff details Model-level reference schedules do not change method selection, quotes or charges. Active charges use the selected Ailoot method rates. Video configuration price references #### Prices by configuration Match each charge to the conditions shown. Use one rate for each set of alternative configurations. | Configuration | Billing conditions | Charge | | --- | --- | --- | | ConfigurationVideo price | Billing conditionsaudio: with\_audio | Charge Output · Video price **$0.16** per video second Published price reference for the configuration shown. Final charges follow the actual billed configuration. | | ConfigurationVideo price | Billing conditionsaudio: without\_audio | Charge Output · Video price **$0.1** per video second Published price reference for the configuration shown. Final charges follow the actual billed configuration. | | ConfigurationVideo price | Billing conditionsaudio: with\_audio; resolution: 720p | Charge Output · Video price **$0.1** per video second Published price reference for the configuration shown. Final charges follow the actual billed configuration. | | ConfigurationVideo price | Billing conditionsaudio: without\_audio; resolution: 720p | Charge Output · Video price **$0.06** per video second Published price reference for the configuration shown. Final charges follow the actual billed configuration. | ### Example requests #### Ailoot Ultra · Video curlcurl · animate your first frame ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" python3 - <<'PY_REQUEST' import json,os from pathlib import Path p=json.loads('{"model": "google/veo-3.1-lite", "prompt": "A cat in a spacesuit walking on the Moon", "duration": 4, "resolution": "720p", "aspect_ratio": "16:9", "generate_audio": false}') Path("request.json").write_text(json.dumps(p,ensure_ascii=False)) PY_REQUEST curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/videos \ -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \ --data-binary @request.json -D response-headers.txt -o result.json ``` ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" : "${AILOOT_IMAGE_URL:?Set the actual HTTPS URL of your first-frame image}" export AILOOT_IMAGE_URL python3 - <<'PY_REQUEST' import json,os,re from pathlib import Path from urllib.parse import urlsplit image=os.environ["AILOOT_IMAGE_URL"] try: parsed=urlsplit(image) valid=(image.startswith("https://") and parsed.scheme=="https" and bool(parsed.hostname) and parsed.username is None and parsed.password is None and "#" not in image and not any(ord(c)<32 or ord(c)==127 for c in image) and re.search(r"%(?![0-9A-Fa-f]{2})",image) is None) except ValueError: valid=False if not valid: raise SystemExit("Use your actual HTTPS image URL with a hostname, no userinfo and no fragment") p={"model":"google/veo-3.1-lite","prompt":"The subject makes a slow, natural movement. Keep the opening composition.","duration":4,"resolution":"720p","aspect_ratio":"16:9","generate_audio":False,"frame_images":[{"type":"image_url","image_url":{"url":image},"frame_type":"first_frame"}]} Path("request.json").write_text(json.dumps(p,ensure_ascii=False),encoding="utf-8") PY_REQUEST curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/videos \ -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \ --data-binary @request.json -D response-headers.txt -o result.json python3 - <<'PY_RESULT' import json from pathlib import Path r=json.loads(Path("result.json").read_text()) print(json.dumps(r,ensure_ascii=False,indent=2)) print("Keep the complete JSON, headers and original returned id. Use the existing GET status tab for that original operation, then save every completed owned output. Never resubmit an unknown generation.") PY_RESULT ``` ### Receive and save results #### Ailoot Ultra · Video mp4 - `GET /v1/videos/{request_id}` - `GET /v1/videos/generations/{request_id}` - `GET /v1/videos/{request_id}/content` - `GET /v1/videos/generations/{request_id}/content` ##### Check job status GET status ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" : "${AILOOT_OPERATION_ID:?Set the actual Ailoot operation ID returned by creation}" export AILOOT_OPERATION_ID operation_id=$(python3 -c 'import os,urllib.parse;print(urllib.parse.quote(os.environ["AILOOT_OPERATION_ID"],safe=""))') curl --fail-with-body --silent --show-error "https://api.ailoot.ai/v1/videos/$operation_id" \ -H "Authorization: Bearer $AILOOT_API_KEY" -o status.json python3 - <<'PY_STATUS' import json from pathlib import Path r=json.loads(Path("status.json").read_text()) print(json.dumps(r)) if r.get("status")=="completed": for x in r.get("data",[]):print(x) PY_STATUS ``` ##### Save all completed assets GET all completed assets ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" : "${AILOOT_STATUS_FILE:?Set the actual completed status JSON file}" export AILOOT_STATUS_FILE python3 - <<'PY_REQUEST' import json,os from pathlib import Path from urllib.parse import urlsplit,urljoin f=Path(os.environ["AILOOT_STATUS_FILE"]) if not f.is_file():raise SystemExit("Choose the actual completed status file") r=json.loads(f.read_text()) if r.get("status")!="completed" or not isinstance(r.get("data"),list) or not r["data"]:raise SystemExit("Wait for a completed status with asset paths") urls=[] for x in r["data"]: if not isinstance(x,str) or "\n" in x or "\r" in x:raise SystemExit("Invalid asset path") u=urljoin("https://api.ailoot.ai",x) z=urlsplit(u) if z.scheme!="https" or z.netloc!="api.ailoot.ai" or z.username or z.password:raise SystemExit("Use the actual Ailoot asset paths from status") urls.append(u) Path("asset-urls.txt").write_text("\n".join(urls)+"\n") PY_REQUEST index=0 while IFS= read -r asset_url; do curl --fail-with-body --silent --show-error "$asset_url" \ -H "Authorization: Bearer $AILOOT_API_KEY" -o "video-${index}.mp4" index=$((index + 1)) done < asset-urls.txt ``` Other content reads GET content ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" : "${AILOOT_OPERATION_ID:?Set the actual Ailoot operation ID returned by creation}" export AILOOT_OPERATION_ID operation_id=$(python3 -c 'import os,urllib.parse;print(urllib.parse.quote(os.environ["AILOOT_OPERATION_ID"],safe=""))') curl --fail-with-body --silent --show-error "https://api.ailoot.ai/v1/videos/$operation_id/content" \ -H "Authorization: Bearer $AILOOT_API_KEY" -o video.mp4 ``` ##### Keep all completed results Save every completed video or returned file; retrieve every actual returned asset URL. Completed data\[\] contains all owned signed content URLs. Fetch each returned URL, or use the content endpoint with index set to an actual output index. A failed original job may return charge\_pending\_check; check that original job rather than creating it again. A valid AAC audio track can be present even with generate\_audio=false; keep the complete original MP4 including that audio. ##### If the original response needs checking Read existing original job; never resubmit unknown send. Maximum outputs: 4. Response fields | Field | Type | Meaning | | --- | --- | --- | | Field`id` | Typestring | Meaning— | | Field`object` | Typestring | Meaning— | | Field`model` | Typestring | Meaning— | | Field`status` | Typestring | Meaning— | | Field`data[]` | Typesigned content URL | Meaning— | | Field`charge_pending_check` | Typeboolean | Meaning— | | Field`error.code` | Typestring | Meaning— | | Field`error.message` | Typestring | Meaning— | | Field`operation_id` | Typestring | MeaningHTTP503 result\_pending\_check original status/content response: same original public video ID as id. | | Field`error.type` | Typestring | Meaningserver\_error on HTTP503 result\_pending\_check. | Errors and next steps | Response | Condition | Next step | | --- | --- | --- | | Response400 · `invalid_request_error` | ConditionInvalid required fields, material representation or parameter value | Next stepCorrect the indicated fields before a new creation request. | | Response409 · `video_not_ready` | ConditionOriginal result content is not yet available | Next stepPoll the original returned ID and respect Retry-After. | | Response`server_error` | ConditionThe returned response says the operation or result requires a check | Next stepKeep the original returned operation/task ID, request headers and response; continue supported reads of that original operation. Do not resubmit the creation request. | | Response503 · `result_pending_check` | ConditionGET original status/content: task is not published, original job is not failed/cancelled/expired, and local state is unknown or original job status is completed. | Next stepKeep original id and operation\_id (same public video ID), response and headers; read only the original status/content. Never submit a new generation request. | | Response422 · `price_unavailable` | ConditionA supplied frame\_images object or its conditional profile fails parsing, or the complete parsed profile has no ready exact price card. | Next stepKeep model, prompt, duration, resolution, aspect\_ratio and generate\_audio. Add frame\_images containing exactly one first\_frame item in the specified object format. Set duration=4, resolution="720p", aspect\_ratio="16:9" and generate\_audio=false. This validation runs before the request is sent. | ### Aliases #### Model aliases **Ailoot Ultra** [`google/veo-3.1-lite`](https://ailoot.ai/models/en/#m=google%2Fveo-3.1-lite&route=Ultra&caller=google%2Fveo-3.1-lite&fmt=videos) #### Method path aliases `/v1/videos/generations`, `/videos`, `/videos/generations` #### Related caller IDs [`google/veo-3.1-lite`](https://ailoot.ai/models/en/#m=google%2Fveo-3.1-lite&route=Ultra&caller=google%2Fveo-3.1-lite&fmt=videos) FAQ · Google: Veo 3.1 Lite What inputs and results are available? `POST /v1/videos` · `google/veo-3.1-lite`: `text`, `image` → `video` Which fields does the request use? `POST /v1/videos` · `google/veo-3.1-lite`: `model`, `prompt`, `duration`, `resolution`, `aspect_ratio`, `generate_audio`, `frame_images` Connect Ailoot to Claude Code, OpenCode, Hermes or your own app. ## The company and its project portfolio The company and its project portfolio: millions of customers; monthly sales in the billions. ## Buy tokens at a discount. Subscription discounts for regular use. Promo codes offer up to 50% off token purchases. Subscription Choose a discounted plan for your regular requests. Promo code: up to 50% off Enter your code at checkout. The price updates to reflect the current promotion. Spending in your history The model, tokens and amount are recorded for each request. [Choose a subscription](https://ailoot.ai/docs/en/billing/subscriptions/) · [View model prices](https://ailoot.ai/models/en/) ## Connect the API to a product you sell. Use Ailoot in SaaS, apps and bots under its official service offer and licence agreement. Request a reseller licence for resale. Commercial application Add text, image, video and audio generation to paid features in your service. Reseller licence Send a description of your project and how you provide access. Request written terms for use and resale. Documents on the website The service offer, licence agreement and data processing policy are available before you connect. [Request a reseller licence](mailto:support@ailoot.ai) · [Service offer and licence agreement](https://ailoot.ai/legal/offer?lang=en) ## Ailoot · The company and its project portfolio Ailoot combines established operating experience, a large client base, stable service and ongoing KPI control. The company and its project portfolio: millions of customers; monthly sales in the billions. Ailoot brings that operating experience to API access for AI features in customer products, agents, applications and automations.