Claude Opus 4.5 vs Nova Premier 1.0
Compare Claude Opus 4.5 by Anthropic against Nova Premier 1.0 by Amazon, in 5 community votes, claude opus 4.5 wins 100% of head-to-head duels, tested across 51 shared challenges.
Reasoning: Claude Opus 4.5 wins 100% of votes
Our Verdict
Claude Opus 4.5Winner
Nova Premier 1.0Runner-up
Pick Claude Opus 4.5. In 5 blind votes, Claude Opus 4.5 wins 100% of the time. That's not luck.
Claude Opus 4.5 particularly excels in Reasoning.
Clear winner
API pricing
Cost per 1M tokens
Claude Opus 4.5
Input
—
Output
—
Nova Premier 1.0
Input
$2.50
Output
$12.50
Writing DNA
Style Comparison
Similarity
59%
Claude Opus 4.5 uses 15.2x more emoji
Claude Opus 4.5
Nova Premier 1.0
64%Vocabulary56%
55wSentence Length39w
0.86Hedging0.90
5.8Bold4.3
4.5Lists5.9
0.15Emoji0.00
1.59Headings0.54
0.05Transitions0.21
Based on 24 + 23 text responses
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