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ZenMux

Doubao-Seed-1.8 API

ZenMux
About

Build advanced reasoning agents with Doubao-Seed-1.8, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.11/1M input and $0.28/1M output tokens, native tool calling support. Access Doubao-Seed-1.8 via the ZenMux 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
Supported
Limits
Context Window
256K

Tokens

Input Limit
256K

Tokens

Max Output
64K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.11
Output
$0.28

Caching (per 1M tokens)

Read
$0.02
Write
$0.0024
Frequently Asked Questions

Doubao-Seed-1.8 by ZenMux costs $0.11 per 1M input tokens and $0.28 per 1M output tokens. Cached reads cost $0.02 per 1M tokens. Cache writes cost $0.0024 per 1M tokens.

Model Details
ID
volcengine/doubao-seed-1.8
Provider
ZenMux
Family
Release Date
Dec 18, 2025
Knowledge Cutoff
Jan 1, 2025
API Integration
NPM Package
@ai-sdk/anthropic
Environment Variables
ZENMUX_API_KEY
API Base URL
https://zenmux.ai/api/anthropic/v1
Documentation