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Benchmarking Claude, GPT, and Gemini on the Same Real Refactor Task

A real-world refactoring benchmark comparing Claude Sonnet 5, GPT-5.6 Sol, and Gemini 3.5 Flash on a 3,000-line legacy TypeScript file in 2026.

Sachin Sharma
Sachin SharmaCreator
Aug 1, 2026
4 min read
Benchmarking Claude, GPT, and Gemini on the Same Real Refactor Task
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A real-world refactoring benchmark comparing Claude Sonnet 5, GPT-5.6 Sol, and Gemini 3.5 Flash on a 3,000-line legacy TypeScript file in 2026.

BenchmarkingClaudeGPTGeminiCode RefactoringTypeScriptAI Models
Sachin Sharma

Sachin Sharma

Software Developer & Mobile Engineer

Building digital experiences at the intersection of design and code. Sharing weekly insights on engineering, productivity, and the future of tech.

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