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API Updates

Stay informed about the latest changes and improvements across all our APIs.

January 2026

2026-01-20

Model Updates | VEO 3.1 4K & Seedance 1.5 Pro 1080P

We are excited to announce major updates to our video generation models, including 4K support for VEO 3.1 and 1080P support for Seedance 1.5 Pro.

VEO 3.1 Vertex AI - Now with 4K Support

VEO 3.1 Fast (Vertex AI)

  • Model ID: veo-3.1-fast-generate-preview
  • Features: Fast generation with 4K support, reference images
  • Highlights: Balanced speed and quality, ideal for rapid iteration
  • Resolution: 720p / 1080p / 4K
  • Duration: 4s / 6s / 8s

VEO 3.1 Pro (Vertex AI)

  • Model ID: veo-3.1-generate-preview
  • Features: Highest quality with 4K support, reference images
  • Highlights: Professional-grade output, best for final production
  • Resolution: 720p / 1080p / 4K
  • Duration: 4s / 6s / 8s

Seedance 1.5 Pro - Now with 1080P Support

  • Model ID: seedance-1.5-pro
  • New Feature: 1080P resolution now available
  • Resolution: 480p / 720p / 1080p
  • Duration: 4-12 seconds

Key Capabilities

  • VEO 3.1 4K: Generate stunning 4K videos for professional use
  • Seedance 1080P: Higher resolution output for Seedance 1.5 Pro
  • Reference Images: Guide generation with reference images
  • Flexible Duration: Multiple duration options for both models

Documentation

2026-01-01

New Model | Seedance 1.5 Pro Video Generation with Audio

We are excited to announce the launch of Seedance 1.5 Pro, BytePlus's latest video generation model with integrated audio generation capabilities.

New Model

Seedance 1.5 Pro

  • Model ID: seedance-1.5-pro
  • Features: Text-to-Video and Image-to-Video generation with optional synchronized audio
  • Highlights: Unified model supporting both T2V and I2V with AI-generated audio
  • Resolution: 480p / 720p
  • Duration: 4-12 seconds

Key Capabilities

  • Text-to-Video: Generate videos directly from text descriptions
  • Image-to-Video: Animate static images with motion
  • Audio Generation: Optional synchronized audio including voice, sound effects, and background music
  • Multiple Aspect Ratios: 16:9, 9:16, 1:1, 4:3, 3:4, 21:9, and Adaptive
  • Reference Images: Support for 1-2 reference images for guided generation

Documentation