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Claude Sonnet 4.5 vs GPT-4.1
Comprehensive side-by-side LLM comparison
Claude Sonnet 4.5 leads with 20.1% higher average benchmark score. GPT-4.1 offers 816.3K more tokens in context window than Claude Sonnet 4.5. GPT-4.1 is $8.00 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 represents an iterative improvement in the GPT-4 series, developed to refine the foundational capabilities established by GPT-4. Built to incorporate learnings and optimizations from the deployment of previous versions, it continues the evolution of OpenAI's flagship model line with enhanced reliability and performance.
5 months newer
GPT-4.1
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
Input:$2.00
Output:$8.00($8.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 6 common benchmarks
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Claude Sonnet 4.5
Average Score:82.2%(+20.1%)
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GPT-4.1
Average Score:62.0%
Performance comparison across key benchmark categories
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Claude Sonnet 4.5
Coding77.2%(+22.6%)
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GPT-4.1
Coding54.6%
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Knowledge Cutoff
Training data recency comparison
GPT-4.1
2024-06-01
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%(+20.1%)
Providers:2
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GPT-4.1
Avg Score:62.0%
Providers:1