Back to articlesComparison 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%)
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.
Leanne ThuongJan 13, 202616 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
Our Recommendation
Use GPT-5 for greenfield development and rapid prototyping. Use Claude 4 for code review, debugging, and tasks requiring careful analysis.