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. Updated April 2026.
Which is better, Claude Sonnet 4.5 or Nova Premier 1.0?
Claude Sonnet 4.5 and Nova Premier 1.0 are both competitive models. Claude Sonnet 4.5 costs $3/M input tokens vs $2.5/M for Nova Premier 1.0. Context windows: 200K vs 1000K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4.5 and Nova Premier 1.0
Claude Sonnet 4.5 is made by anthropic while Nova Premier 1.0 is from amazon. Claude Sonnet 4.5 has a 200K token context window compared to Nova Premier 1.0's 1000K. On pricing, Claude Sonnet 4.5 costs $3/M input tokens vs $2.5/M for 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.
Style Comparison
Claude Sonnet 4.5 uses 45.2x more emoji
vs
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
