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Vercel AI Gateway

Seed 1.8 API

Vercel AI Gateway
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

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Output Modalities

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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 Gateway
Family
seed
Release Date
Oct 1, 2025
Knowledge Cutoff
Oct 1, 2024
API Integration
NPM Package
@ai-sdk/gateway
Environment Variables
AI_GATEWAY_API_KEY
Documentation