Seed 1.8

Seed 1.8: a seed model from Volcengine, ~256K context

Published
scheduleReleased:December 28, 2025

Seed 1.8 is a seed model from Volcengine (~256K context, input around $0.11875/1M tokens). Suitable for assistants, content generation, knowledge Q&A and business automation

starsCapabilities

visibilityVision understandingcodeFunction callingdata_objectStructured output

paymentsContext and pricing

Context limit256,000
Max output64,000
Input price$0.11875/ 1M tokens
Output price$1.18747/ 1M tokens
Cached input price$0.02375/ 1M tokens

descriptionOverview

Overview

Seed 1.8 is provided by Volcengine, model ID doubao-seed-1-8-251228

Key specs

  • Context: 256K tokens
  • Max output: 64K tokens
  • Input price: $0.11875/1M
  • Output price: $1.18747/1M

Best for

Consider Seed 1.8 when comparing context length, pricing, multimodal support and relay availability

lightbulbUse cases

  • Image and multimodal Q&A
  • Visual content analysis
  • Document and screenshot understanding

thumb_upStrengths

  • Very long context (~256K), good for long documents and codebases
  • Supports image and multimodal input
  • High single-response output limit (~64K)

infoLimitations

  • Pricing and availability vary by upstream and relay; verify with official docs and tests

linkReferences

This content is compiled from official documentation and public sources. Always refer to official documentation for final details