Really impressed by how smooth switching most of my coding tasks to Codex (GPT-5.5) from Claude Code (Opus 4.7) has been. I thought it was g…

Really impressed by how smooth switching most of my coding tasks to Codex (GPT-5.5) from Claude Code (Opus 4.7) has been. I thought it was going to be more difficult and that I would be "fighting" with the model a lot. If there was ever a good time to try Codex, it would be now. I feel like Codex (GPT-5.5) just gets it and has a "warmer and more welcoming personality" compared to previous iterations. I appreciate the sharp responses and how straight to the point it is. I really don't care about these benchmark numbers anymore. They don't say anything about how good an agent harness performs in real work tasks. GPT-5.5 tries hard to get as much done, given the scope of the instruction. It doesn't try too hard (doing things that I haven't asked) or too little. The effort feels just right. I think that part is hard to get right, but there is something very different about how this model was trained and how aligned it is to be helpful. Skills have also helped a lot in this switch. Both Claude Code and Codex now make proper use of all my skills. MCP tools work right out of the box. I was a heavy user of the Claude-in-Chrome tools, but GPT-5.5 + chrome-cdp skill is actually amazing! Finally, having a blast with coding agents again. Opus 4.7 has superb planning, and I will continue to use it for lots of my research and automated tasks. Will keep testing both Claude Code and Codex and a few other coding agents and share more along the way.

Source: DAIR.AI (X) | 2026-04-24