I've been coding with Claude 3 Opus since it first launched this past Monday. From the start I thought it was better than GPT-4, on a surface level it was less 'lazy' with its completions, and as I dived deeper, it was able to produce good code to solve bugs GPT-4 Turbo was not able to do.
IMO Opus is hands down the superior model for coding, the GPT-4 killer if you will. We immediately shipped it to all of our users at https://www.double.bot (coding copilot) and have been hearing similar stories from users all week.