Cracked AI Engineering

Grok 3 Mini Fast vs Kimi K2 Instruct

Grok 3 Mini Fast includes advanced reasoning, Kimi K2 Instruct has open weights. Compare full specs, pricing, and choose the best model for your use case.

Quick Overview

Grok 3 Mini Fast

Vercel AI Gateway

131K tokens context • $0.60 / $4.00 per 1M tokens

View full specifications →

Kimi K2 Instruct

Vercel AI Gateway

131K tokens context • $1.00 / $3.00 per 1M tokens

View full specifications →

Detailed Comparison

Specification
Grok 3 Mini Fast
Kimi K2 Instruct
Provider
Vercel AI Gateway
Vercel AI Gateway
Context Window
131K tokens
131K tokens
Max Output Tokens
8K tokens
16K tokens
Input Pricing (per 1M tokens)
$0.60
$1.00
Output Pricing (per 1M tokens)
$4.00
$3.00
Release Date
Feb 2025
Jul 2025

Capabilities

Capability
Grok 3 Mini Fast
Kimi K2 Instruct
Text Generation
Function Calling
Advanced Reasoning

Which Model Should You Choose?

Choose Grok 3 Mini Fast if:

  • • Cost efficiency is a priority
  • • You need advanced reasoning

Choose Kimi K2 Instruct if:

  • • You prefer open weights