Core features

Veo 3.1 focuses on practical content creation features:

Native audio generation (dialogue, ambient sound, SFX) integrated in outputs. Veo 3.1 generates native audio (dialogue + ambience + SFX) aligned to the visual timeline; the model aims to preserve lip sync and audio–visual alignment for dialogue and scene cues.
Longer outputs (support for up to ~60 seconds / 1080p versus Veo 3’s very short clips,8s), and multi-prompt multi-shot sequences for narrative continuity.
Scene Extension and First/Last Frame modes that extend or interpolate footage between key frames.
Object insertion and (coming) object removal and editing primitives inside Flow.

Each bullet above is designed to reduce manual VFX work: audio and scene continuity are now first-class outputs rather than afterthoughts.

Technical details (model behavior & inputs)

Model family & variants: Veo belongs to Google’s Veo-3 family; the preview model ID is typically veo3.1-pro; veo3.1 (CometAPI doc). It accepts text prompts, image references (single frame or sequences), and structured multi-prompt layouts for multi-shot generation.

Resolution & duration: Preview documentation describes outputs at 720p/1080p with options for longer durations (up to ~60s in certain preview settings) and higher fidelity than earlier Veo variants.

Aspect ratios: 16:9 (supported) and 9:16 (supported except in some reference-image flows).

Prompt language: English (preview).

API limits: typical preview limits include max 10 API requests/min per project, max 4 videos per request, and video lengths selectable among 4, 6, or 8 seconds (reference-image flows support 8s).

Benchmark performance

Google’s internal and publicly summarized evaluations report strong preference for Veo 3.1 outputs across human rater comparisons on metrics such as text alignment, visual quality, and audio–visual coherence (text→video and image→video tasks).

Veo 3.1 achieved state-of-the-art results on internal human-rater comparisons across several objective axes — overall preference, prompt alignment (text→video and image→video), visual quality, audio-video alignment, and “visually realistic physics” on benchmark datasets such as MovieGenBench and VBench.

Limitations & safety considerations

Limitations:

Artifacts & inconsistency: despite improvements, certain lighting, fine-grained physics, and complex occlusions can still yield artifacts; image→video consistency (especially over long durations) is improved but not perfect.
Misinformation / deepfake risk: richer audio + object insertion/removal increases misuse risk (realistic fake audio and extended clips). Google notes mitigations (policy, safeguards) and earlier Veo launches referenced watermarking/SynthID to aid provenance; however technical safeguards do not eliminate misuse risk.
Cost & throughput constraints: high-resolution, long videos are computationally expensive and currently gated in a paid preview—expect higher latency and cost compared with image models. Community posts and Google forum threads discuss availability windows and fallback strategies.

Safety controls: Veo3.1 has integrated content policies, watermarking/synthID signaling in earlier Veo releases, and preview access controls; customers are advised to follow platform policy and implement human review for high-risk outputs.

Practical use cases

Rapid prototyping for creatives: storyboards → multi-shot clips and animatics with native dialogue for early creative review.
Marketing & short form content: 15–60s product spots, social clips, and concept teasers where speed matters more than perfect photorealism.
Image→video adaptation: turning illustrations, characters, or two frames into smooth transitions or animated scenes via First/Last Frame and Scene Extension.
Tooling augmentation: integrated into Flow for iterative editing (object insertion/removal, lighting presets) that reduces manual VFX passes.

Comparison with other leading models

Veo 3.1 vs Veo 3 (predecessor): Veo 3.1 focuses on improved prompt adherence, audio quality, and multi-shot consistency — incremental but impactful updates aimed at reducing artifacts and improving editability.

Veo 3.1 vs OpenAI Sora 2: tradeoffs reported in press: Veo 3.1 emphasizes longer-form narrative control, integrated audio, and Flow editing integration; Sora 2 (when compared in press) focuses on different strengths (speed, different editing pipelines). TechRadar and other outlets frame Veo 3.1 as Google’s targeted competitor to Sora 2 for narrative and longer video support. Independent side-by-side testing remains limited.

Veo 3.1 的定價

探索 Veo 3.1 的競爭性定價，專為滿足各種預算和使用需求而設計。我們靈活的方案確保您只需為實際使用量付費，讓您能夠隨著需求增長輕鬆擴展。了解 Veo 3.1 如何在保持成本可控的同時提升您的專案效果。

veo3.1（videos）

Model name	Tags	Calculate price
veo3.1-all	videos	$0.20000
veo3.1	videos	$0.40000

Veo 3.1 的範例程式碼和 API

存取完整的範例程式碼和 API 資源，以簡化您的 Veo 3.1 整合流程。我們詳盡的文件提供逐步指引，協助您在專案中充分發揮 Veo 3.1 的潛力。

#!/bin/bash
# Get your CometAPI key from https://api.cometapi.com/console/token
# Export it as: export COMETAPI_KEY="your-key-here"

BASE_URL="https://api.cometapi.com/v1"
IMAGE_PATH="/tmp/veo3.1_reference.jpg"

# ============================================================
# Step 1: Download Reference Image
# ============================================================
echo "Step 1: Downloading reference image..."

curl -s -o "$IMAGE_PATH" "https://images.unsplash.com/photo-1506905925346-21bda4d32df4?w=1280"
echo "Reference image saved to: $IMAGE_PATH"

# ============================================================
# Step 2: Create Video Generation Task (form-data with image upload)
# ============================================================
echo ""
echo "Step 2: Creating video generation task..."

RESPONSE=$(curl -s -X POST "${BASE_URL}/videos" \
  -H "Authorization: $COMETAPI_KEY" \
  -F 'prompt=A breathtaking mountain landscape with clouds flowing through valleys, cinematic aerial shot' \
  -F 'model=veo3.1' \
  -F 'size=16x9' \
  -F "input_reference=@${IMAGE_PATH}")

echo "Create response:"
echo "$RESPONSE" | jq .

TASK_ID=$(echo "$RESPONSE" | jq -r '.id')

if [ "$TASK_ID" = "null" ] || [ -z "$TASK_ID" ]; then
  echo "Error: Failed to get task_id from response"
  exit 1
fi

echo "Task ID: $TASK_ID"

# ============================================================
# Step 3: Query Task Status
# ============================================================
echo ""
echo "Step 3: Querying task status..."

QUERY_RESPONSE=$(curl -s -X GET "${BASE_URL}/videos/${TASK_ID}" \
  -H "Authorization: $COMETAPI_KEY")

echo "Query response:"
echo "$QUERY_RESPONSE" | jq .

TASK_STATUS=$(echo "$QUERY_RESPONSE" | jq -r '.data.status')
echo "Task status: $TASK_STATUS"

cURL Code Example

#!/bin/bash
# Get your CometAPI key from https://api.cometapi.com/console/token
# Export it as: export COMETAPI_KEY="your-key-here"

BASE_URL="https://api.cometapi.com/v1"
IMAGE_PATH="/tmp/veo3.1_reference.jpg"

# ============================================================
# Step 1: Download Reference Image
# ============================================================
echo "Step 1: Downloading reference image..."

curl -s -o "$IMAGE_PATH" "https://images.unsplash.com/photo-1506905925346-21bda4d32df4?w=1280"
echo "Reference image saved to: $IMAGE_PATH"

# ============================================================
# Step 2: Create Video Generation Task (form-data with image upload)
# ============================================================
echo ""
echo "Step 2: Creating video generation task..."

RESPONSE=$(curl -s -X POST "${BASE_URL}/videos" \
  -H "Authorization: $COMETAPI_KEY" \
  -F 'prompt=A breathtaking mountain landscape with clouds flowing through valleys, cinematic aerial shot' \
  -F 'model=veo3.1' \
  -F 'size=16x9' \
  -F "input_reference=@${IMAGE_PATH}")

echo "Create response:"
echo "$RESPONSE" | jq .

TASK_ID=$(echo "$RESPONSE" | jq -r '.id')

if [ "$TASK_ID" = "null" ] || [ -z "$TASK_ID" ]; then
  echo "Error: Failed to get task_id from response"
  exit 1
fi

echo "Task ID: $TASK_ID"

# ============================================================
# Step 3: Query Task Status
# ============================================================
echo ""
echo "Step 3: Querying task status..."

QUERY_RESPONSE=$(curl -s -X GET "${BASE_URL}/videos/${TASK_ID}" \
  -H "Authorization: $COMETAPI_KEY")

echo "Query response:"
echo "$QUERY_RESPONSE" | jq .

TASK_STATUS=$(echo "$QUERY_RESPONSE" | jq -r '.data.status')
echo "Task status: $TASK_STATUS"

Python Code Example

import os
import requests
import json

# Get your CometAPI key from https://api.cometapi.com/console/token, and paste it here
COMETAPI_KEY = os.environ.get("COMETAPI_KEY") or "<YOUR_COMETAPI_KEY>"
BASE_URL = "https://api.cometapi.com/v1"

headers = {
    "Authorization": COMETAPI_KEY,
}

# ============================================================
# Step 1: Download Reference Image
# ============================================================
print("Step 1: Downloading reference image...")

image_url = "https://images.unsplash.com/photo-1506905925346-21bda4d32df4?w=1280"
image_response = requests.get(image_url)
image_path = "/tmp/veo3.1_reference.jpg"
with open(image_path, "wb") as f:
    f.write(image_response.content)
print(f"Reference image saved to: {image_path}")

# ============================================================
# Step 2: Create Video Generation Task (form-data with image upload)
# ============================================================
print("\nStep 2: Creating video generation task...")

with open(image_path, "rb") as image_file:
    files = {
        "input_reference": ("reference.jpg", image_file, "image/jpeg"),
    }
    data = {
        "prompt": "A breathtaking mountain landscape with clouds flowing through valleys, cinematic aerial shot",
        "model": "veo3.1",
        "size": "16x9",
    }
    create_response = requests.post(
        f"{BASE_URL}/videos", headers=headers, data=data, files=files
    )

create_result = create_response.json()
print("Create response:", json.dumps(create_result, indent=2))

task_id = create_result.get("id")
if not task_id:
    print("Error: Failed to get task_id from response")
    exit(1)
print(f"Task ID: {task_id}")

# ============================================================
# Step 3: Query Task Status
# ============================================================
print("\nStep 3: Querying task status...")

query_response = requests.get(f"{BASE_URL}/videos/{task_id}", headers=headers)
query_result = query_response.json()
print("Query response:", json.dumps(query_result, indent=2))

task_status = query_result.get("data", {}).get("status")
print(f"Task status: {task_status}")

JavaScript Code Example

import fs from "fs";
import path from "path";
import os from "os";

// Get your CometAPI key from https://api.cometapi.com/console/token, and paste it here
const api_key = process.env.COMETAPI_KEY || "<YOUR_COMETAPI_KEY>";
const base_url = "https://api.cometapi.com/v1";

// ============================================================
// Step 1: Download Reference Image
// ============================================================
console.log("Step 1: Downloading reference image...");

const imageUrl = "https://images.unsplash.com/photo-1506905925346-21bda4d32df4?w=1280";
const imageResponse = await fetch(imageUrl);
const imageBuffer = Buffer.from(await imageResponse.arrayBuffer());
const imagePath = path.join(os.tmpdir(), "veo3.1_reference.jpg");
fs.writeFileSync(imagePath, imageBuffer);
console.log(`Reference image saved to: ${imagePath}`);

// ============================================================
// Step 2: Create Video Generation Task (form-data with image upload)
// ============================================================
console.log("\nStep 2: Creating video generation task...");

const formData = new FormData();
formData.append("prompt", "A breathtaking mountain landscape with clouds flowing through valleys, cinematic aerial shot");
formData.append("model", "veo3.1");
formData.append("size", "16x9");
formData.append("input_reference", new Blob([fs.readFileSync(imagePath)], { type: "image/jpeg" }), "reference.jpg");

const createResponse = await fetch(`${base_url}/videos`, {
  method: "POST",
  headers: {
    "Authorization": api_key,
  },
  body: formData,
});

const createResult = await createResponse.json();
console.log("Create response:", JSON.stringify(createResult, null, 2));

const taskId = createResult?.id;
if (!taskId) {
  console.log("Error: Failed to get task_id from response");
  process.exit(1);
}
console.log(`Task ID: ${taskId}`);

// ============================================================
// Step 3: Query Task Status
// ============================================================
console.log("\nStep 3: Querying task status...");

const queryResponse = await fetch(`${base_url}/videos/${taskId}`, {
  method: "GET",
  headers: {
    "Authorization": api_key,
  },
});

const queryResult = await queryResponse.json();
console.log("Query response:", JSON.stringify(queryResult, null, 2));

const taskStatus = queryResult?.data?.status;
console.log(`Task status: ${taskStatus}`);

Veo 3.1的版本

Veo 3.1擁有多個快照的原因可能包括：更新後輸出結果存在差異需保留舊版快照以確保一致性、為開發者提供適應與遷移的過渡期，以及不同快照對應全球或區域端點以優化使用者體驗等潛在因素。各版本間的具體差異請參閱官方文件說明。

Model id	description	Availability	Price	Requst
veo3.1-all	The technology used is unofficial and the generation is unstable etc	✅	$0.2 / per	Chat format
veo3.1	Recommend, Pointing to the latest model	✅	$0.4/ per	Async Generation

Veo 3.1

Veo 3.1 的 Playground