Seed 1.8 API
About
Build advanced reasoning agents with Seed 1.8, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.25/1M input and $2.00/1M output tokens, native tool calling support. Access Seed 1.8 via the Vercel AI Gateway API with up to 64K output tokens.
Capabilities
Input Modalities
textimage
Output Modalities
text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
256K
Tokens
Input Limit
256K
Tokens
Max Output
64K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.25
Output
$2.00
Caching (per 1M tokens)
Read
$0.05
Frequently Asked Questions
Seed 1.8 by Vercel AI Gateway costs $0.25 per 1M input tokens and $2.00 per 1M output tokens. Cached reads cost $0.05 per 1M tokens.
Model Details
ID
bytedance/seed-1.8
Provider
Vercel AI GatewayFamily
seed
Release Date
Sep 1, 2025
Knowledge Cutoff
Oct 1, 2024
API Integration