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Medium
bytebridge.medium.com › opencode-vs-claude-code-vs-openai-codex-a-comprehensive-comparison-of-ai-coding-assistants-bd5078437c01
OpenCode vs Claude Code vs OpenAI Codex: A Comprehensive Comparison of AI Coding Assistants | by ByteBridge | Feb, 2026 | Medium
February 5, 2026 - All three can significantly accelerate ... on your project’s demands. OpenAI Codex CLI — Codex is designed to be straightforward for developers to get running....
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Builder.io
builder.io › blog › codex-vs-claude-code
Codex vs Claude Code: which is the better AI coding agent?
September 28, 2025 - Claude Code in particular has closed a lot of the gap since this article was first published — better UX, a VS Code extension, a web IDE, and a more polished desktop app. If you prefer Claude Code or Cursor, I completely respect that.
People also ask

Is Codex still better than Claude Code in 2026?
Codex still wins on GitHub integration and pricing. But Claude Code has closed the gap significantly — better UX, a VS Code extension, a web IDE, and Cowork mode. Which is better depends on your workflow. If you live in the terminal and care about GitHub automation, Codex. If you want more configuration options and hooks, Claude Code.
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builder.io
builder.io › blog › codex-vs-claude-code
Codex vs Claude Code: which is the better AI coding agent?
Can I use both Codex and Claude Code together?
Yes, and many teams do. Use Codex for background GitHub tasks and Claude Code for terminal sessions where you want more slash commands and hooks.
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builder.io
builder.io › blog › codex-vs-claude-code
Codex vs Claude Code: which is the better AI coding agent?
Does Claude Code still not support AGENTS.md?
Correct as of this writing. Claude Code uses CLAUDE.md. If you want one instructions file that works across tools, use AGENTS.md for Codex, Cursor, and Builder.io, and keep a synced CLAUDE.md for Claude Code.
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builder.io
builder.io › blog › codex-vs-claude-code
Codex vs Claude Code: which is the better AI coding agent?
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Reddit
reddit.com › r/opencodecli › comparison vs claude code
r/opencodeCLI on Reddit: Comparison vs Claude Code
January 26, 2026 -

Hello, I'm an avid user of Claude Code, and has recently tried switching to Opencode since I also have a GitHub Copilot subscription and would like to use it (and Claude Code) with the opencode CLI.

However, the opencode CLI has some limitations that make it hard for me to switch to it completely. I'll list them here, and maybe y'all can help me understand why and maybe mitigate them.

  1. Skill Marketplace: It seems opencode's support for plugins and marketplaces doesn't quite match that of Claude Code. With CC, I can add a variety of skills from sources (like obra's skills) directly from the marketplace. Not sure if it's possible to do with Claude Code

  2. Dangerous permissions by default: The "Build" agent is synonymous to Claude code's --dangerously-skip-permissions flag. It just implements the stuff without asking you anything, and can run any command on your system, which is extremely dangerous. I would like if there was another agent that would ask me for permissions like CLaude to access tools like WebFetch or run commands.

  3. The TUI is meh... The interface of opencode is a CLI, but tries to act like a GUI. While there's some merit to it (like you can click on messages to copy, edit, restore, etc...), the experience feels unnatural, the scroll speed doesn't match the ones in my other applications.

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DataCamp
datacamp.com › blog › codex-vs-claude-code
Codex vs. Claude Code: AI Coding Assistants ComCodex vs. Claude Code: AI Coding Assistants Comparedpared | DataCamp
March 4, 2026 - Explore what’s new in Claude Code 2.1 by running a set of focused experiments on an existing project repository within CLI and web workflows. ... Learn to use OpenAI Codex CLI to build a website and deploy a machine learning model with a custom user interface using a single command.
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Reddit
reddit.com › r/opencodecli › opencode v/s claude code
r/opencodeCLI on Reddit: OpenCode v/s Claude Code
1 month ago -

I have seen a lot of people saying that opencode is better than cc at a variety of tasks but I have not really felt that, like I just wanna know how are you guys using opencode I use my code and antigravity models from opencode but like claude code and codex combined does the job for me for a lot of work like am i using the wrong models in opencode or is it meant for something different. I just wanna know ways in which I can improve my setup to make it at par with cc.

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Reddit
reddit.com › r/chatgptcoding › codex cli vs claude code (adding features to a 500k codebase)
r/ChatGPTCoding on Reddit: Codex CLI vs Claude Code (adding features to a 500k codebase)
September 5, 2025 -

I've been testing OpenAI's Codex CLI vs Claude Code in a 500k codebase which has a React Vite frontend and a ASP .NET 9 API, MySQL DB hosted on Azure. My takeaways from my use cases (or watch them from the YT video link in the comments):

- Boy oh boy, Codex CLI has caught up BIG time with GPT5 High Reasoning, I even preferred it to Claude Code in some implementations

- Codex uses GPT 5 MUCH better than in other AI Coding tools like Cursor

- Vid: https://youtu.be/MBhG5__15b0

- Codex was lacking a simple YOLO mode when I tested. You had to acknowledge not running in a sandbox AND allow it to never ask for approvals, which is a bit annoying, but you can just create an alias like codex-yolo for it

- Claude Code actually had more shots (error feedback/turns) than Codex to get things done

- Claude Code still has more useful features, like subagents and hooks. Notifications from Codex are still in a bit of beta

- GPT5 in Codex stops less to ask questions than in other AI tools, it's probably because of the released official GPT5 Prompting Guide by OpenAI

What is your experience with both tools?

Top answer
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Former Claude Code user for a few months on Max 20x, fairly heavy user too. Loved it at the time, but feels like at least during part of last month the quality of the model responses degraded. I found myself having to regularly steer Claude into not making changes I didn't actually agree on (yes I use the plan mode, it's highly valuable). Claude also often told me that code was production ready when it wasn't, it either failed to compile or had some kind of flaw that needed addressing. Found out about a $1 Teams plan offer for ChatGPT so figured it would be a great opportunity to check out Codex CLI and GPT_5. Suffice to say it impressed me. I tell it what I want, it just does that. Most tasks I've thrown at it are usually completed and successful in one or two shots. If I'm possibly wrong or there's a reason to debate something first then it usually does so, while Claude would've often said "you're absolutely right, ..." - blindly agreeing with me regardless. GPT-5 also makes far less assumptions compared to Claude, regularly replying with open questions if it has any. After it completes a task GPT_5 will usually follow up with an idea or suggestion related to what we had done, which I also found useful. The biggest challenge I've given it so far was to refactor a long overdue and messy .cs file that contained about 3k LOC. I've tried this with various other AI LLMs, including Claude Code (which couldn't read the entire file as it was over 25k tokens), but they just ultimately make bugs and mess things up when trying to do so. I didn't think GPT-5 would be any different, but my god, it surprised me again. I planned with it, did it in small bits and pieces at a time, and a day or so later I'm now down to around 1k LOC for that file. It seems to be working fine too. I've been using Claude primarily since Sonnet 3.5, and GPT models before Sonnet 3.5, but it looks like I'm back with OpenAI again unless Anthropic "wow" me back. For Codex CLI, I would recommend checking out the "just-every/code" fork. Much nicer UI, /plan, /solve, /code commands, multiple themes, integrated browser capability, can resume previous conversations.
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Gpt5 is definitely smarter model. CC has better scaffolding. However, codex is open source, so it will catch up fast.
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Tembo
tembo.io › blog › coding-cli-tools-comparison
The 2026 Guide to Coding CLI Tools: 15 AI Agents Compared – Tembo
February 6, 2026 - What sets it apart: OpenCode's breadth is remarkable. It includes LSP integration (automatically configuring language servers for the LLM), multi-session support (run multiple parallel agents on the same project), and session sharing via links. The privacy-first design stores no code or context data. It also supports authentication via GitHub Copilot or ChatGPT Plus accounts, letting you use existing subscriptions. Model support: 75+ providers via Models.dev. Claude, GPT, Gemini, local models, and free models included by default.
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Reddit
reddit.com › r/claudeai › a few thoughts on codex cli vs. claude code
r/ClaudeAI on Reddit: A few thoughts on Codex CLI vs. Claude Code
August 18, 2025 -

Opus 4.1 is a beast of a coding model, but I'd suggest to any Claude Max user to at least try Codex CLI for a day. It can also use your ChatGPT subscription now and I've been getting a ton of usage out of my Plus tier. Even with Sonnet, Claude Pro would have limited me LONG ago.

A few thoughts:

  • While I still prefer CC + Opus 4.1 overall, I actually prefer the code that Codex CLI + GPT-5 writes. It's closer to the code I'd also write.

  • I've used CC over Bedrock and Vertex for work and the rate limits were getting really ridiculous. Not sure this also happens with the Anthropic API, but it's really refreshing how quick and stable GPT-5 performs over Codex CLI.

  • As of today Claude Code is a much more feature rich and complete tool compared to Codex. I miss quite a few things coming from CC, but core functionality is there and works well.

  • GPT-5 seems to have a very clear edge on debugging.

  • GPT-5 finds errors/bugs while working on something else, which I haven't noticed this strongly with Claude.

  • Codex CLI now also supports MCP, although support for image inputs doesn't seem to work.

  • Codex doesn't ship with fetch or search, so be sure to add those via MCP. I'm using my own

  • If your budget ends at $20 per month, I think ChatGPT might be the best value for your money

What's your experience?

Find elsewhere
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Composio
composio.dev › content › claude-code-vs-openai-codex
Claude Code vs. OpenAI Codex | Composio
Claude Code comes with native MCP support and extensive context windows. Codex recently added stdio-based MCP support (they still don't have direct support for HTTP endpoints for MCPs), while Claude Code supports MCPs out of the box.
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Northflank
northflank.com › blog › claude-code-vs-openai-codex
Claude Code vs OpenAI Codex: which is better in 2026? | Blog — Northflank
September 15, 2025 - ... The major difference between Claude Code and OpenAI's Codex agent is this: Claude Code emphasizes a developer-in-the-loop, local workflow using the terminal, while OpenAI's Codex agent is designed for both local and autonomous, cloud-based ...
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Hacker News
news.ycombinator.com › item
Codex vs. Claude Code (today) | Hacker News
December 28, 2025 - It could've been shortened to: Codex is more hands off, I personally prefer that over claude's more hands-on approach. Neither are bad. I won't bring you proof or examples, this is just my opinion based on my experience · My goal wasn't to create a complete comparison of both tools — but ...
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Morph
morphllm.com › comparisons › opencode-vs-codex
OpenCode vs Codex CLI (2026): 112K Stars vs GPT-5.3 Codex-Spark
February 28, 2026 - OpenCode still generates more thorough outputs (94 vs 73 tests), but the speed gap widened significantly. Note: the community "Codex is rapidly degrading" thread suggests real-world quality may not match benchmarks.
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Awesome Agents
awesomeagents.ai › awesome agents › tools › codex vs claude code vs opencode: three terminal coding agents, compared
Codex vs Claude Code vs OpenCode: Three Terminal Coding Agents, Compared | Awesome Agents
February 26, 2026 - Claude Code: Native MCP with OAuth handling. Per-subagent MCP configuration. Limitation: not available in background subagents. OpenCode: MCP support for extending tool capabilities through external servers.
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Hacker News
news.ycombinator.com › item
Claude Code vs. Codex: I built a sentiment dashboard from Reddit comments | Hacker News
October 19, 2025 - I probably use CC 80% of the time with Codex the other 20%. My company pays for CC and I don't even look at the cost. Most of my coworkers use CC over Codex. We do find the Codex PR reviewer to be the best of any tool out there · Codex gets a lot of play on twitter also because a lot of the ...
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Reddit
reddit.com › r/claudecode › codex vs claude code
r/ClaudeCode on Reddit: Codex Vs Claude code
August 30, 2025 -

For those who have already tested the Codex, what do you think?

Top answer
1 of 5
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From the perspective of using the pure model, I think GPT5 has fully reached the level of sonnet4, and in some cases even surpasses it. As for Codex, I’ve tried both Codex CLI and Codex in VS Code. They already have a certain degree of usability, but indeed lack quite a few features, and the gap with Claude Code is still significant. Moreover, I don’t understand why Codex’s MCP doesn’t adopt the common approach.
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Codex web or Codex CLI? Here's my basic comparison, based on my experience: - Claude Code, sophisticated feature set, good UI, but Claude models appear to have some noticeable issues such as "you're absolutely right" where it blindly agrees with you without discussion and debate, where it can often, even with a plan, do extra things you didn't actually want, and it's not too difficult to run out of context if you have to steer Claude. Unfortunately effectively closed source. - Codex CLI, basic feature set but is improving, basic UI currently as well, however GPT-5 appears to adhere to my instructions much stronger than Claude does, even without a plan. If it believes I'm wrong about something, or needs to discuss something possibly for further clarification, it will do so and not make bold assumptions first. I don't have to regularly steer it like I do with Claude. I don't have to worry about the context window running out at the most inconvenient moment. It simply gets the tasks completed. It's also open source which means anyone can contribute to the code or fork their own version of Codex CLI. I've been on Claude Max 20x for a few months, loved it at the time, but I'm going to likely be cancelling very soon and switch to ChatGPT Pro instead.
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Reddit
reddit.com › r/codex › codex vs claude code
r/codex on Reddit: Codex vs Claude Code
December 29, 2025 -

I’ve tried both, and for now I slightly prefer Codex. I can’t fully explain why, it mostly comes down to some personal benchmarks based on my day-to-day work.

One big plus for Codex is usage: on the $20 plan I’ve never hit usage limits or interruptions, while using the same plan on both.

With Codex I’m using AGENTS.md, some reusable prompts in a prompts folder, and I’m planning to experiment with skills. I also tried plugging in a simple MCP server I built, but I couldn’t get it to work with Codex, so it feels a bit less flexible in that area.

What do you think is better overall: Claude Code or Codex? In terms of output quality and features.

Let the fight begin

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Nxcode
nxcode.io › home › resources › news › claude code vs codex cli 2026: which terminal ai coding agent wins?
Claude Code vs Codex CLI 2026: Which Terminal AI Coding Agent Wins? | NxCode
1 week ago - March 2026 — Terminal-based AI coding agents have become the default tool for serious developers. The two dominant players — Anthropic's Claude Code and OpenAI's Codex CLI — both operate from the command line, both handle multi-file edits autonomously, and both promise to transform how you write software.
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Builder.io
builder.io › blog › claude-code-alternatives
5 Claude Code Alternatives in 2026
5 days ago - Gemini CLI (1,000 requests/day, Google Search built in) Claude Code set the bar for agentic coding, and these tools each bring a different strength: async execution, model flexibility, visual collaboration, and team-wide access.