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Vercel AI Gateway

Kimi K3 Fast API

Vercel AI Gateway
About

Build advanced reasoning agents with Kimi K3 Fast, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $4.50/1M input and $22.50/1M output tokens, native tool calling support. Access Kimi K3 Fast via the Vercel AI Gateway API with up to 131K output tokens.

Capabilities

Input Modalities

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Output Modalities

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Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Fixed
Attachment
Supported
Limits
Context Window
1.0M

Tokens

Input Limit
1.0M

Tokens

Max Output
131K

Tokens

Pricing

Standard (per 1M tokens)

Input
$4.50
Output
$22.50

Caching (per 1M tokens)

Read
$0.45
Frequently Asked Questions

Kimi K3 Fast by Vercel AI Gateway costs $4.50 per 1M input tokens and $22.50 per 1M output tokens. Cached reads cost $0.45 per 1M tokens.

Model Details
ID
moonshotai/kimi-k3-fast
Provider
Vercel AI Gateway
Family
kimi-k3
Release Date
Jul 27, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/gateway
Environment Variables
AI_GATEWAY_API_KEY
Documentation