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Seed 1.8

Seed 1.8

By ByteDance
Model family: Seed
Seed1.8 is ByteDance’s generalized agent model integrating perception, reasoning and action in one system. It supports text and image input, invokes tools for web search and code execution, and operates GUIs across desktop, web and mobile. The model maintains strong LLM and VLM benchmark performance while adding robust video understanding and multi-step real-world workflow execution.
New Multimodal Gen 3
Released: December 18, 2025

Overview

General-purpose agentic model that unifies LLM and VLM abilities with search, code execution and GUI control, designed to perceive text and images, reason over long contexts and autonomously carry out multi-step tasks.

About ByteDance

ByteDance is a multinational technology company known for its content platforms, including TikTok and Douyin.

Industry: Internet
Company Size: 10001+
Location: Beijing, CN
Website: bytedance.com
View Company Profile

Other models from this family

  • Gen 3Seed
    Seed 2.0
    By ByteDance
    Seed 2.0 is described publicly only as a new ByteDance Seed language model for Doubao, but there is not yet any reliable, detailed public technical description of its architecture, context length, or training data that I can quote.
    NewMultimodal
    Released 1d ago
  • Gen 3Seed
    Seed 1.5 VL
    By ByteDance
    Compact vision-language foundation model from ByteDance Seed, combining a 532M vision encoder with a 20B-active MoE LLM to deliver strong image, video and GUI understanding and multimodal reasoning, with many SOTA results at low inference cost.
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    Released 9mo ago
  • Gen 3Seed
    Seed 1.5
    By ByteDance
    Mixture-of-experts Seed1.5 (Doubao-1.5-pro) large language model that balances high performance with efficient inference, excelling at knowledge, coding and reasoning while using far fewer active parameters than comparable dense models
    Multimodal
    Released 1y ago

Tools using Seed 1.8

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Last updated: February 13, 2026
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