xAI: Grok 4.3 vs Polaris Alpha
Compare xAI: Grok 4.3 by xAI against Polaris Alpha by OpenRouter, context windows of 1.0M vs 256K, tested across 34 shared challenges.
Our Verdict
xAI: Grok 4.3
Polaris AlphaRunner-up
No community votes yet. On paper, xAI: Grok 4.3 has the edge — newer, bigger context window, major provider backing.
Too close to call
API pricing
Cost per 1M tokens
xAI: Grok 4.3
Input
$1.25
Output
$2.50
Polaris Alpha
Input
$0.000
Output
$0.000
Writing DNA
Style Comparison
Similarity
57%
xAI: Grok 4.3 uses 225.5x more bold
xAI: Grok 4.3
Polaris Alpha
62%Vocabulary65%
16wSentence Length15w
0.46Hedging0.23
2.3Bold0.0
2.5Lists11.3
0.00Emoji0.00
0.34Headings0.00
0.14Transitions0.04
Based on 27 + 14 text responses
Research
What we learned reading every model
FAQ
