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  1. Home
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Kimi K3 vs Union Alpha

Compare Kimi K3 from moonshotai and Union Alpha from Stealth on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

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AI Model Comparison

Favicon for moonshotai
Kimi K3
Favicon for stealth
Union Alpha
Favicon for moonshotai
Kimi K3
Favicon for stealth
Union Alpha

Overview

Kimi K3
Author
moonshotai
Union Alpha
Author
Stealth
Kimi K3
Context length
1.05Mtokens
Union Alpha
Context length
262Ktokens
Kimi K3
Reasoning
Union Alpha
Reasoning
Kimi K3
Input modalities
Union Alpha
Input modalities
Kimi K3
Output modalities
Union Alpha
Output modalities

Kimi K3 vs Union Alpha: side-by-side summary

Kimi K3 and Union Alpha are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Kimi K3, from moonshotai, has a 1,048,576-token context window and is priced at $2.10/M tokens input, $10.95/M tokens output on OpenRouter.

Union Alpha, from Stealth, has a 262,144-token context window and is free to use on OpenRouter.

Context window
  • Kimi K3: 1,048,576 tokens
  • Union Alpha: 262,144 tokens
Price
  • Kimi K3: $2.10/M tokens input, $10.95/M tokens output
  • Union Alpha: Free
Provided by
  • Kimi K3: moonshotai
  • Union Alpha: Stealth
  • Kimi K3 model details, providers and pricing
  • Union Alpha model details, providers and pricing