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ZenMux

Gemini 3 Flash Preview API

ZenMux
About

Build advanced reasoning agents with Gemini 3 Flash Preview, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.50/1M input and $3.00/1M output tokens, native tool calling support. Access Gemini 3 Flash Preview via the ZenMux API with up to 64K output tokens.

Capabilities

Input Modalities

textimagepdfaudio

Output Modalities

text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
1.0M

Tokens

Input Limit
1.0M

Tokens

Max Output
64K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.50
Output
$3.00

Caching (per 1M tokens)

Read
$0.05
Write
$1.00
Frequently Asked Questions

Gemini 3 Flash Preview by ZenMux costs $0.50 per 1M input tokens and $3.00 per 1M output tokens. Cached reads cost $0.05 per 1M tokens. Cache writes cost $1.00 per 1M tokens.

Model Details
ID
google/gemini-3-flash-preview
Provider
ZenMux
Family
Release Date
Dec 17, 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