After testing both AI assistants on 50+ real coding tasks, Claude 3.5 Sonnet wins for complex logic and code quality. ChatGPT takes speed and debugging. Here's the full breakdown with benchmarks.
After two weeks of daily testing with real development tasks, Claude Sonnet 4.5 edges out GPT-4o for most developers. It's faster for code generation, writes cleaner functions, and costs 40% less per million tokens. But GPT-4o wins on complex reasoning and multimodal tasks.
After testing Claude, ChatGPT, and Gemini across 500+ prompts, one AI assistant clearly dominates for most users. ChatGPT-4 wins overall with the best balance of capability and speed, but Claude 3.5 Sonnet takes the crown for coding and complex reasoning.
An in-depth comparison of Anthropic's Claude Opus 4.5 and OpenAI's GPT-5 across coding, reasoning, creative writing, and real-world application performance.