Harnoor Singh on Instagram: "World's Best Coding Model is Here!! Finally! 💡 Pro tip: Use Sonnet 4.5 to build end-to-end apps → then polish the UI with GPT-5.0. Forget the benchmarks for a moment—let’s talk evolution: At first, AI could only add a few lines or functions. Then it could build front & back ends, but you had to manually connect them with your own API key. Next, AI auto-integrated APIs, but front–back end communication was still messy, full of errors. Now with Sonnet 4.5, those error