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Claude Opus 4.5 vs DeepSeek-R1
Comprehensive side-by-side LLM comparison
Claude Opus 4.5 leads with 44.7% higher average benchmark score. Claude Opus 4.5 offers 128.0K more tokens in context window than DeepSeek-R1. DeepSeek-R1 is $27.26 cheaper per million tokens. Claude Opus 4.5 supports multimodal inputs. Claude Opus 4.5 is available on 3 providers. Overall, Claude Opus 4.5 is the stronger choice for coding tasks.
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Anthropic
Claude Opus 4.5, released by Anthropic in November 2025, is a large language model from the Claude 4.5 family built for demanding reasoning tasks, advanced code generation, and complex agentic workflows. It features a 200K token context window, 64K maximum output tokens, native image understanding, and extended thinking with configurable effort levels. Opus 4.5 targets deep analytical work, multi-step tool orchestration, and applications requiring sustained reasoning across long, complex tasks.
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DeepSeek
DeepSeek-R1, released by DeepSeek on January 20, 2025, is a large reasoning model with 671 billion total parameters (37 billion active in its MoE architecture) designed for extended chain-of-thought reasoning. It features a 128K token context window and demonstrated strong performance on mathematics, coding, and scientific reasoning benchmarks at its release. DeepSeek-R1 targets complex analytical tasks, competitive programming, and applications requiring deep deliberative reasoning under an open MIT license.
9 months newer
DeepSeek-R1
DeepSeek
2025-01-20
Claude Opus 4.5
Anthropic
2025-11-01
Pricing Comparison
Cost per million tokens (USD)
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Claude Opus 4.5
Input:$5.00
Output:$25.00
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DeepSeek-R1
Input:$0.55
Output:$2.19($27.26 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Claude Opus 4.5
Average Score:77.4%(+44.7%)
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DeepSeek-R1
Average Score:32.8%
Performance comparison across key benchmark categories
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Claude Opus 4.5
Science87.0%(+24.6%)
Agents67.8%(+64.7%)
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DeepSeek-R1
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Knowledge Cutoff
Training data recency comparison
Claude Opus 4.5
2025-05
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 Opus 4.5
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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DeepSeek-R1
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Claude Opus 4.5
Avg Score:77.4%(+44.7%)
Providers:3
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DeepSeek-R1
Avg Score:32.8%
Providers:1