Comprehensive side-by-side LLM comparison
Claude Sonnet 4.5 leads with 36.5% higher average benchmark score. Nova Pro offers 336.0K more tokens in context window than Claude Sonnet 4.5. Nova Pro is $14.00 cheaper per million tokens. Overall, Claude Sonnet 4.5 is the stronger choice for coding tasks.
Anthropic
Claude Sonnet 4.5 was developed to bridge human thinking and machine assistance, allowing people to work with language and tools in a more conversational and natural way. Built with a focus on turning ideas into results, it represents an evolution in making AI feel less mechanical while maintaining strong capabilities across reasoning, coding, and collaborative tasks.
Amazon
Amazon Nova Pro was developed as the flagship model in the Nova family, designed to provide advanced multimodal understanding across text, images, and other modalities. Built to handle complex tasks requiring sophisticated reasoning, it represents Amazon's most capable offering for enterprise applications.
10 months newer

Nova Pro
Amazon
2024-11-20

Claude Sonnet 4.5
Anthropic
2025-09-29
Cost per million tokens (USD)

Claude Sonnet 4.5

Nova Pro
Context window and performance specifications
Average performance across 1 common benchmarks

Claude Sonnet 4.5

Nova Pro
Claude Sonnet 4.5
2025-01-31
Available providers and their performance metrics

Claude Sonnet 4.5
Anthropic
ZeroEval


Claude Sonnet 4.5

Nova Pro

Claude Sonnet 4.5

Nova Pro
Nova Pro
Bedrock