The old traditional way of coding (and learning how to) is very much long gone. AI-assisted coding, or perhaps vibe coding as it's now affectionately called, has become the default for a growing number of developers. Ultimately, the tools you choose matter more than ever, and copying code snippets from ChatGPT, Claude and Gemini and then pasting it into your IDE doesn't really cut it anymore. There are a bunch of dedicated AI coding tools now, with the most capable ones living right within your terminal or editor. These tools can understand your entire codebase, and are capable of executing complex, multi-file changes from a single prompt.

Claude Code has quickly turned into my go-to tool for this purpose, and it's led to me spending more time in the terminal than Instagram (and I say this as someone who was once terrified of the terminal). The most direct competitor to Claude Code is OpenAI's Codex, which is relatively new compared to Claude Code's several-month head start. I tested it out during its initial days, and it didn't really match Claude Code in any meaningful way. Codex has improved rapidly since then, so I decided to ditch Claude Code for a week and go all-in on Codex to see if it could hold up as my daily driver. Here's how that went.

To start, Codex is open to everyone

Try before you buy

The biggest reason why people around me haven't used Claude Code is the barrier to entry. You need a paid account to even give it a spin and see if it meets your needs, and not everyone's willing to subscribe to a plan just to try a single feature (without knowing if it's worth the hype). The fact that Claude doesn't currently offer a free trial option makes this even harder to justify. The only way you can really try it for free is if someone gives you a referral link!

Codex, on the other hand, is available on OpenAI's free tier. You can sign in and start using it. If you like it and think it's valuable for you, you can upgrade to a paid plan for more usage. If not, you've lost nothing. It's a much easier ask than committing to a subscription upfront just to see what all the fuss is about. Now, to keep this test fair, I did use a paid Codex tier too. But the fact that a free option even exists gives Codex a huge advantage when it comes to getting people through the door. Claude Code could be the better tool in every other way, and it still wouldn't matter if people never try it.

Codex is more autonomous, and I'm not a fan

Slow down, I didn't say build yet

I'm not a fan of giving AI a vague prompt and just...building what it thinks I want to build. I'd rather spend some extra time upfront explaining my preferences, answering any questions, and just giving as much detail as I possibly can to ensure the output it produces is as close to my vision as possible.

In my testing, I've found that Claude Code does this naturally. It asks a bunch of questions, checks assumptions, and keeps you in the loop throughout. When it doesn't know something, it doesn't try to fill in the gaps itself and almost always asks for your preferences before taking a crack at it. Just to be clear, I'm not even referring to Claude Code's Plan mode here. Instead, I'm talking about its default behavior. Even without explicitly telling it to plan first, Claude Code just naturally pauses and checks in with you.

I observed that Codex, on the other hand, just takes your prompt and begins building. For instance, I recently built a tool for my workflow using Claude Code, and I decided to use the same prompt to see what Codex would produce. Claude Code asked around 10 questions trying to pinpoint exactly what I wanted to build and how I wanted every aspect of it, whereas Codex began building after I sent the same prompt. The result was just as you'd expect it. Claude Code's output was significantly closer to what I actually had in mind, because it had spent that extra time understanding what I wanted before writing a single line of code.

On the other hand, though Codex's version encapsulated exactly what I wanted to build fairly well, it was also filled with assumptions I didn't agree with. For instance, the tool I built relies heavily on an AI model's API to process inputs and return results. It's a core part of how the whole thing works. Codex assumed I wanted to use an Anthropic model for this, which honestly made me laugh. Codex, an OpenAI product, defaulting to Anthropic?

Meanwhile, Claude Code took a completely different approach. It walked me through my options, explained the trade-offs between different providers, broke down how much each one would cost per call, and let me make the final decision. I ended up going with a setup that made way more sense for my use case. Out of curiosity, I decided to add the same API key to the Codex version to compare, and the version it produced sadly cost me more per task than the one Claude Code helped me build. This was because Claude had actually optimized for efficiency after understanding what I needed, while Codex just picked a model and moved on.

I recently built the same app with Claude Code and Codex and wrote about the experience, and noticed the same pattern. Claude Code's willingness to ask questions upfront consistently led to better first drafts, while Codex's rush to build meant more time spent fixing things after the fact.

Codex's limits are far more generous

You actually get to finish what you started

The single biggest complaint you'll hear Claude users talk about are the brutal limits. Their limits were always relatively tight, but they've gotten noticeably worse over the past few months. There are a number of factors contributing to this, including the surge of users due to the Pentagon x OpenAI deal and Anthropic refusing to comply with the Department of War's stance, Claude's stance on AI safety, the model's creativity, and the new features and capabilities it keeps getting updated with.

While it's unfortunate for Claude users, the results of this sudden surge have trickled right down to them, and that has unfortunately resulted in even tighter limits. In fact, Thariq Shihipar shared a post on X stating that around 7% of users will now hit limits they wouldn't have before! Despite being on the Max 5x tier that has, well, 5 times the usage of the Pro plan per session, I still find myself hitting limits way too often.

Here's the interesting bit — in my testing, I found that Codex's Pro tier limits were more generous than Claude Code's Max 5x tier. Claude Code's Pro plan frankly has disappointing limits too. On Claude Code, I'd hit the session limit with just a few prompts (even when using a lightweight model like Sonnet). That says a lot.

Money-wise, Claude has four tiers: Free, Pro ($20/month), Max 5x ($100/month), and Max 20x ($200/month). Codex also has four tiers that directly concern the average user: Free, Go ($8/month), Plus ($20/month), and Pro ($100/month and $200/month plans). So with Codex, you're definitely getting more value for your money.

Claude Code comes with an entire ecosystem

You're paying for way more than just code

At the pace at which Claude is developing, it's now beginning to feel like a full-fledged ecosystem. With a paid subscription, you get access to Cowork too, which is essentially Claude Code's agentic capabilities but for non-coding tasks. It can read and write to your local files, organize your folders, draft reports from source documents, and even schedule recurring tasks like pulling metrics or running a weekly digest all without you having to sit there and manage every step.

They recently added Dispatch, which lets you message Claude a task from your phone and have it carry out the work on your computer while you're away. On top of that, there's a plugin marketplace, MCP connectors for tools like Slack, Google Drive, and Microsoft 365, and even a brand new product called Claude Design for creating visuals like prototypes and slides.

In other words, when you subscribe to Claude, you're getting a coding tool, a desktop assistant, a design tool, scheduled automations, and a growing library of integrations — all under one roof. Codex doesn't really have an equivalent to this. It's an excellent coding agent, and the GitHub integration is best-in-class, but that's largely where it ends. If you're someone who wants one platform to handle as much of your workflow as possible, Claude's ecosystem is hard to match.

Codex might be the better pick for experienced developers

Beginners, you might want to stick with Claude

This point ties back to the autonomy point I earlier. I believe Codex's approach works well if you're an experienced developer who already clearly knows what you want, and you don't need your hand held through decisions.

However, if you're new to coding, that same approach can leave you with code you don't really understand and choices you didn't know were being made. Claude Code's habit of asking questions, explaining trade-offs, and walking you through options is a genuinely educational experience and massively helps beginners like me.

Looks like I'll be renewing my Claude Code subscription

Despite the better limits you get with Codex and the fact that anyone can try it for free, Claude Code is still the tool I'd recommend to most people. That said, I do think Codex is great and is worth trying out too. It just isn't the tool for me!