Claude Sonnet 4.5 vs Nova Premier 1.0
Compare Claude Sonnet 4.5 by Anthropic against Nova Premier 1.0 by Amazon, context windows of 200K vs 1.0M, tested across 41 shared challenges.
Our Verdict
Claude Sonnet 4.5
Nova Premier 1.0
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 4.5
Input
$3.00
Output
$15.00
Nova Premier 1.0
Input
$2.50
1.2× cheaper
Output
$12.50
1.2× cheaper
Nova Premier 1.0 is cheaper on both — 1.2× input, 1.2× output
Writing DNA
Style Comparison
Similarity
62%
Claude Sonnet 4.5 uses 45.2x more emoji
Claude Sonnet 4.5
Nova Premier 1.0
64%Vocabulary56%
94wSentence Length39w
0.48Hedging0.90
4.9Bold4.3
8.0Lists5.9
0.45Emoji0.00
1.91Headings0.54
0.07Transitions0.21
Based on 20 + 23 text responses
Research
What we learned reading every model
FAQ
