I’ve been using Codex w GPT 5.5 more than Claude Code recently. I think Anthropic won the marketing game because Codex is quite good, even better IME.
Claude has always been better at making pretty frontends, which is crucial for people that vibecode entire apps in a couple of prompts. And that people drive a lot of the hype.
Codex ever since ~5.2 has been better at long tasks in large codebases.
One very annoying thing about Codex: You can't do anything until all MCP servers are loaded and connected (or failed).
Can you move it to background connection?
I'm not sure about that. Claude has some bugs, but Codex is not as polished and doesn't have as many features. For example, you need to add MCP servers manually. There's no Plugin/Skill/Connector marketplace that is accessible from within the app, like there is with Claude Desktop. The Cowork-equivalent is nowhere as powerful. And so on.
I still use Codex, but mostly when I need to check Opus 4.8's work. Pretty sure I will stop doing that soon, because during the short time Fable was available, Codex was not able to find any important issues with the code Fable wrote.
I started using GPT for coding for the first time this week, and I’m sort of in awe at how well it’s following all of my hooks, skills, and prompts. GPT is so unlazy and deterministic, it’s honestly been so refreshing this week. I cancelled my Claude 20X and replaced it with GPT 20X, no regrets so far.
That said, I feel icky, like I just made a Facebook account in 2026 :(