Claude Sonnet 4.5 out now
My initial impressions were that it felt like a better model for code than GPT-5-Codex, which has been my preferred coding model since it launched a few weeks ago. This space moves so fast - Gemini 3 is rumored to land soon so who knows how long Sonnet 4.5 will continue to hold the "best coding model" crown.
I wanted to try out chatGPT before committing to Claude for longer term. I did do that now. It is good at a few things, like, the web agent feature, which I’ve used extensively over the past couple of weeks.
OpenAI also released the codex model around that time. For coding tasks it has been better in my experience than Claude, hardly making any mistakes. I had to prompt it to change something a couple of times out of almost fifty or so code changes.
The 4.5 release is supposed to be better.
ChatGPT was worse at creating draft CVs though. I was looking to go back to Claude for this reason alone. I think I will now.