Claude Opus 4.5 leads coding benchmarks; DeepSeek V4 excels at large refactors

A comparison of Claude Opus 4.5 and DeepSeek V4 highlights their distinct strengths in coding tasks. Claude Opus 4.5 excels at precise, surgical fixes for production bugs and single-file issues, achieving a leading 80.9% score on the SWE-bench benchmark. DeepSeek V4, conversely, is better suited for large-scale, multi-file refactoring and repository-wide migrations when provided with extensive context. The choice between them depends on the scope and nature of the coding task. AI

Summary written by gemini-2.5-flash-lite from 1 source. How we write summaries →

IMPACT Claude Opus 4.5 and DeepSeek V4 offer complementary strengths for developers, guiding optimal model selection for different coding tasks.

RANK_REASON Comparison of two LLMs on a specific benchmark. [lever_c_demoted from research: ic=1 ai=1.0]

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• Claude Opus 4.5
• DeepSeek V4
• SWE-bench

• model release
• paper