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Claude Sonnet 4.5 vs GPT-4.1 nano
Comprehensive side-by-side LLM comparison
Claude Sonnet 4.5 leads with 43.7% higher average benchmark score. GPT-4.1 nano offers 816.3K more tokens in context window than Claude Sonnet 4.5. GPT-4.1 nano is $17.50 cheaper per million tokens. Overall, Claude Sonnet 4.5 is the stronger choice for coding tasks.
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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.
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OpenAI
GPT-4.1 Nano was developed as the smallest and most efficient variant in the GPT-4.1 family, designed for applications requiring minimal latency and resource usage. Built to enable AI capabilities on edge devices and resource-constrained environments, it distills GPT-4.1 capabilities into an ultra-compact form factor.
5 months newer
GPT-4.1 nano
OpenAI
2025-04-14
Claude Sonnet 4.5
Anthropic
2025-09-29
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Pricing Comparison
Cost per million tokens (USD)
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Claude Sonnet 4.5
Input:$3.00
Output:$15.00
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GPT-4.1 nano
Input:$0.10
Output:$0.40($17.50 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 4 common benchmarks
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Claude Sonnet 4.5
Average Score:82.2%(+43.7%)
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GPT-4.1 nano
Average Score:38.5%
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Knowledge Cutoff
Training data recency comparison
GPT-4.1 nano
2024-05-31
Claude Sonnet 4.5
2025-01-31
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude Sonnet 4.5
2 providers
Anthropic
Throughput: 42 tok/s
Latency: 0.4ms
ZeroEval
Throughput: 42 tok/s
Latency: 0.4ms
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Claude Sonnet 4.5
Avg Score:82.2%(+43.7%)
Providers:2
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GPT-4.1 nano
Avg Score:38.5%
Providers:1