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Claude Sonnet 4.5 vs DeepSeek-V3.2 Thinking
Comprehensive side-by-side LLM comparison
Claude Sonnet 4.5 leads with 4.1% higher average benchmark score. Claude Sonnet 4.5 offers 128.0K more tokens in context window than DeepSeek-V3.2 Thinking. DeepSeek-V3.2 Thinking is $15.26 cheaper per million tokens. Claude Sonnet 4.5 supports multimodal inputs. Claude Sonnet 4.5 is available on 3 providers. Both models have their strengths depending on your specific coding needs.
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Anthropic
Claude Sonnet 4.5, released by Anthropic in September 2025, is a large language model from the Claude 4.5 family that balances response quality and efficiency for coding, agentic tasks, and analytical work. It features a 200K token context window (extendable to 1M tokens in beta), 64K maximum output tokens, native image understanding, and extended thinking support. Sonnet 4.5 targets use cases that require a balance of throughput and reasoning depth, including code generation, data analysis, and multi-step agentic pipelines.
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DeepSeek
DeepSeek-V3.2-Exp (DeepSeek-V3.2 Thinking), released by DeepSeek in September 2025, is the experimental preview release of the DeepSeek-V3.2 model featuring 685 billion total parameters and integrated thinking capabilities. It introduced the architecture and training approaches that became the foundation of the final V3.2 release, including thinking in tool-use and hybrid reasoning modes.
Launched on the same date
Claude Sonnet 4.5
Anthropic
2025-09-29
DeepSeek-V3.2 Thinking
DeepSeek
2025-09-29
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-V3.2 Thinking
Input:$0.55
Output:$2.19($15.26 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%(+4.1%)
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DeepSeek-V3.2 Thinking
Average Score:73.1%
Performance comparison across key benchmark categories
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Claude Sonnet 4.5
Coding77.2%(+4.1%)
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DeepSeek-V3.2 Thinking
Coding73.1%
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Knowledge Cutoff
Training data recency comparison
Claude Sonnet 4.5
2025-01
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
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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DeepSeek-V3.2 Thinking
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Claude Sonnet 4.5
Avg Score:77.2%(+4.1%)
Providers:3
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DeepSeek-V3.2 Thinking
Avg Score:73.1%
Providers:1