I think everyone is going to freak out about Claude Code. It’s a step change up from normal Claude-sonnet-3.7, because it’s so easy to put it in a loop until it gets the output it needs. Check out this prompt I’ve given it to optimise a simple program like Fibonacci. I define the problem and get it to write a series of progressively faster implementations, across different languages, verifying its output. I get it to use GPT-4.5 to suggest further optimisations. GPT-4.5 tries to use SIMD instructions that don’t work, Claude sees the compiler error and asks it to avoid those. All I did was gave Claude Code an API key and high level English instructions! I've spent ages this week using it for a variety of tasks. It can write client server applications, websites, netcode. It really shines when you give it high level detailed instructions, and when it can verify its work as it goes. Technology like this is going to radically change software development. The images contain the highlights - sorry there's a lot of text - its worth it. The details of this toy algorithm are less important - but this sort of development loop is going to change software.