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Comparison

Claude 4 vs GPT-5: The Developer Benchmark You've Been Waiting For

We tested both models across 100 real-world coding tasks spanning 10 languages. Here are the definitive results.

16 min read

With both Claude 4 and GPT-5 now available, developers need data to make informed choices. We ran both models through 100 real-world coding tasks.

Methodology

Tasks included bug fixing, feature implementation, code review, refactoring, and greenfield development across Python, TypeScript, Rust, Go, and more.

Results Summary

GPT-5 won on raw code generation accuracy (89% vs 85%). Claude 4 won on code explanation quality and following complex multi-step instructions (92% vs 87%).

By Category

  • Bug fixing: Claude 4 (91% vs 86%)
  • Feature implementation: GPT-5 (90% vs 84%)
  • Code review: Claude 4 (94% vs 88%)
  • Refactoring: Tied (87% vs 87%)

    • Our Recommendation

    Use GPT-5 for greenfield development and rapid prototyping. Use Claude 4 for code review, debugging, and tasks requiring careful analysis.

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