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Claude Sonnet 4.5 vs DeepSeek-V2.5
Comprehensive side-by-side LLM comparison
Claude Sonnet 4.5 leads with 60.4% higher average benchmark score. Claude Sonnet 4.5 offers 247.6K more tokens in context window than DeepSeek-V2.5. DeepSeek-V2.5 is $17.58 cheaper per million tokens. Claude Sonnet 4.5 supports multimodal inputs. 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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DeepSeek
DeepSeek-V2.5 was developed as an enhanced iteration of the DeepSeek-V2 architecture, designed to incorporate improvements in model quality and efficiency. Built to advance the DeepSeek foundation model series, it provides refined capabilities for general-purpose language understanding and generation tasks.
1 year newer
DeepSeek-V2.5
DeepSeek
2024-05-08
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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DeepSeek-V2.5
Input:$0.14
Output:$0.28($17.58 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Claude Sonnet 4.5
Average Score:77.2%(+60.4%)
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DeepSeek-V2.5
Average Score:16.8%
Performance comparison across key benchmark categories
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Claude Sonnet 4.5
Coding77.2%(+60.4%)
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DeepSeek-V2.5
Coding16.8%
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Knowledge Cutoff
Training data recency comparison
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:77.2%(+60.4%)
Providers:2
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DeepSeek-V2.5
Avg Score:16.8%
Providers:3