codex cli vs opencode - Brave Search

Opencode vs Codex CLI: Same Prompt, Clearer Output — Why?

reddit.com › r › opencodeCLI › comments › 1qdujsl › opencode_vs_codex_cli_same_prompt_clearer_output

Coding agent clients (sometimes referred to as harnesses) have their own prompt engineering flows. those include the system prompt, compacting strategies, context lookups, code indexing and more. Behind the scenes you plugged them to the same model with the same user prompt, but the model received a whole lot of different prompt that just happens to include a part of it that is identical Answer from ori_303 on reddit.com

reddit.com › r/opencodecli › opencode vs codex cli: same prompt, clearer output — why?

r/opencodeCLI on Reddit: Opencode vs Codex CLI: Same Prompt, Clearer Output — Why?

January 16, 2026 -

Hi everyone! I came across Opencode and decided to try it out—was curious. I chose Codex (I have a subscription). I was genuinely surprised by how easy it was to communicate in planning mode with gpt-5.2-low: discussing tasks, planning, and clarifying details felt much smoother. Before, using the extension or the CLI was pretty tough—the conversation felt “dry.” But now it feels like I’m chatting with Claude or Gemini. I entered the exact same command—the answers are essentially the same, but Opencode explains it much more clearly. Could someone tell me what the secret is?

edit#1:
Second day testing the opencode + gpt-5.2-medium setup, and the difference is huge. With Codex CLI and the extension, it was hard for me to properly discuss tasks and plan — the conversation felt dry. Here, I can spend the whole day calmly talking things through and breaking plans down step by step. It genuinely feels like working with Opus, and sometimes even better. I’m using it specifically for planning and discussion, not for writing code. I don’t fully understand how opencode achieves this effect — it doesn’t seem like something you can get just by tweaking rules. With Codex CLI, it felt like talking to a robot; now it feels like talking to a genuinely understanding person.

Coding agent clients (sometimes referred to as harnesses) have their own prompt engineering flows. those include the system prompt, compacting strategies, context lookups, code indexing and more. Behind the scenes you plugged them to the same model with the same user prompt, but the model received a whole lot of different prompt that just happens to include a part of it that is identical

morphllm.com › comparisons › opencode-vs-codex

OpenCode vs Codex CLI (2026): 112K Stars vs GPT-5.3 Codex-Spark

February 28, 2026 - Codex CLI is a vertical integration play: Rust performance + GPT-5.3-Codex-Spark on Cerebras WSE-3 (the first non-Nvidia production LLM deployment) + cloud infrastructure. OpenCode is a horizontal flexibility play: TypeScript + any provider ...

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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....

sigmabench.com › blog › opencode-vs-codex-cli-on-gpt-5-1-codex-mini-and-5-2-codex

OpenCode vs Codex CLI (5.1 Codex Mini + 5.2 Codex)

January 29, 2026 - On OpenAI’s flagship coding model, GPT 5.2 Codex, our benchmark tells a similar story as with GPT 5.1 Codex Mini. OpenCode is statistically tied with Codex CLI on Accuracy, but lags behind a full tier on Consistency and is once again a bit slower.

reddit.com › r/codex › opencode cli vs codex cli

r/codex on Reddit: Opencode cli vs Codex cli

January 19, 2026 -

Recently opencoded added chatgpt support (not just api key, subscription models work too). Anybody used that? How does opencode cli perform against codex cli?

I haven’t tried opencode yet but people on here have said codex cli pure is better. Will be testing it out this week though.

It’s a good tool and can be configured to use multiple models. OTOH it’s using opentui which breaks some features of my terminal. What do you want to know with "perform"? Any test case you have in mind?

slashdot.org › software › ai coding agents › codex cli vs. opencode

Compare Codex CLI vs. OpenCode in 2026

Codex CLI supports a seamless coding experience, empowering developers to focus more on building and less on managing tedious coding processes. OpenCode brings AI-driven development directly into the terminal with a sleek, native TUI that adapts to your preferred theme and style.

augmentcode.com › tools › codex-2-0-vs-cursor-vs-copilot-cli-vs-opencode-which-wins

Codex 2.0 vs Cursor vs Copilot CLI vs Opencode: Which Wins? | Augment Code

September 25, 2025 - Codex CLI from OpenAI provides a 192k token context window and runs locally. But it's undergoing a major rewrite from Node.js to Rust, which creates uncertainty about stability. Opencode is an open-source terminal agent that supports multiple ...

news.ycombinator.com › item

OpenCode also has an extremely fast and reliable UI compared to the other CLIs. ... | Hacker News

January 24, 2026 - But tbh OpenAI openly supporting OpenCode is the bigger draw for me on the plan but do want to spend more time with native Codex as a base of comparison against OpenCode when using the same model · I’m just happy to have so many competitive options, for now at least

Find elsewhere

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sourceforge.net › software › compare › Codex-CLI-vs-opencode

Codex CLI vs. OpenCode Comparison

Compare Codex CLI vs. OpenCode using this comparison chart. Compare price, features, and reviews of the software side-by-side to make the best choice for your business.

x.com › dorkitude › status › 1963352425148157976

Kyle Wild on X: "Septemer 3rd, 2025: Terminal-based programming roundup - opencode and OpenAI's Codex CLI are both definitely now viable as daily drivers, for real engineering. A month ago, the only things I could actually use were Amp Code and Claude Code. That is no longer true. - Gemini" / X

Septemer 3rd, 2025: Terminal-based programming roundup - opencode and OpenAI's Codex CLI are both definitely now viable as daily drivers, for real engineering. A month ago, the only things I could actually use were Amp Code and Claude Code. That is no longer true.

app.daily.dev › home › devops toolkit › terminal agents: codex vs. crush vs. opencode vs. cursor cli vs. claude code

Terminal Agents: Codex vs. Crush vs. OpenCode vs. Cursor CLI vs. Claude Code | daily.dev

September 15, 2025 - A comprehensive comparison of terminal-based AI coding agents including Codex CLI, Charm Crush, OpenCode, and Cursor CLI, testing their ability to work with GPT-5 and support essential features like MCP servers and saved prompts.

reddit.com › r/codex › codex cli vs gpt-5.2 codex on opencode — which do you prefer?

r/codex on Reddit: Codex CLI vs GPT-5.2 Codex on OpenCode — which do you prefer?

February 2, 2026 -

Hey everyone,

I’ve been seeing a lot of people moving from Claude code to Codex, so I’m thinking about giving it a try.

For those who’ve used it:

Do you prefer Codex CLI or GPT-5.2 Codex on OpenCode?

What’s the best way to use Codex day-to-day (workflow, setup, tips)?

Thanks!

I tried this. From personal experience, emphatically can say just use Codex CLI :) It is built for it. And more importantly it's rapidly improving.

Opencode sucks when it comes to long convos, compact is not using the true power of remote compact (which is excellent). Protocol is half implemented. Vanilla opencode has the wrong context size configured for the models. I put in a patch to fix all these issues that got rejected - the devs don't really want to concentrate on chatgpt support. Avoid. The latest codex CLI is far far better, especially with collab model, multi-agent, background tasks etc.

reddit.com › r/codex › codex in opencode

r/codex on Reddit: Codex in OpenCode

December 30, 2025 -

Fellow Codex users, anyone using codex in OpenCode or https://github.com/code-yeongyu/oh-my-opencode? I want to know what the general consensus is on this, whether it’s advised or if you think just using Codex cli is possibly better. Im seeing lots of hype with OpenCode so want to hear people’s thoughts and if they’ve tried it. (Also if you use codex with it does it charge to your api key or you can use your weekly codex limit from chatgpt plan?) Thanks.

Codex cli works fine. Not going to overthink it.

Opencode is cool and yes normally it works with API but they allow Claude Max subscriptions natively and codex subscription via plugin (afaik), I use the API key so you may need to ask someone else. When comparing opencode with another tool, it's better to compare it with CC than codex, as a TUI. Because opencode is so ahead of codex in feature parity and trades blows with CC in QOL features. I use it as my daily driver and it has nearly all the features I want and if not, there are plugins. The automatic LSP and formatter integrations will save you a lot of compilation errors because the agent automatically gets the errors fed back to it when it makes syntax errors or similar, which is very valuable. Automatic formatting will make your code cleaner, the codex team have instructions in their AGENTS.md for how to run just fmt after every step to ensure formatting etc, this comes automatically in opencode, something that even CC doesn't have. They're now adding native LSP tools like symbol searching, renaming etc so soon the agent will not be globing and rg-ing its way around

aimagicx.com › blog › codex-cli-vs-opencode-cli-comparison

Codex CLI vs OpenCode CLI: OpenAI's Agent vs The Community Alternative | AI Magicx Blog | AI Magicx

December 31, 2025 - Analysis: OpenCode offers more installation options including multiple Windows package managers. Both support npm and Homebrew. Analysis: Codex CLI emphasizes real-time collaboration with plan preview.

reddit.com › r/vibecoding › claudecode vs codex vs opencode vs gemini cli vs others for regular and multimodal tasks.

r/vibecoding on Reddit: claudecode vs codex vs opencode vs gemini cli vs others for regular and multimodal tasks.

September 1, 2025 - Except for Gemini cli, can opencode or any of the others support taking in image or voice as an input for generating/editing code? Share ... Nobody's responded to this post yet. Add your thoughts and get the conversation going. Best AI Coding Tool: Gemini CLI, Codex, or Claude Code

reddit.com › r/opencodecli › why do you guys use opencode?

r/opencodeCLI on Reddit: Why do you guys use opencode?

1 week ago -

I've been building my own agent harness for the past few months, and I feel like its pretty dang good. I support a ton of oauths as well (if people are willing to help me test them all that would be great since i don't have them all). I'm wondering though if there is anything about opencode which is particularly good which I or other coding agents don't have? I don't really see the appeal, but I want to understand.

The above video is a chill coding session in my own harness.

https://github.com/1jehuang/jcode

I honestly feel retarded when I see this amount of sessions side by side. I've been using LLMs pretty heavly this past few months and I always have 2 sessions, veeeery rarely 3. This doesn't feel sustainable. I mean, I get it that in the very beginning of the project you can spin this amount for the boilerplate, but after 1-2h what in the living hell can you build with this amount of parallelism?

how fast are you burning credits with so many sessions going at once? i assume this is like for people with infinite money to use?

reddit.com › r/opencodecli › why should i use my openai subscription with open code instead of plain codex?

r/opencodeCLI on Reddit: Why should I use my OpenAI subscription with Open Code instead of plain codex?

January 25, 2026 -

I’m really interested in the project since I love open source, but I’m not sure what are the pros of using OpenCode.

I love using Codex with the VSC extension and I’m not sure if i can have the same dev experience with Open Code.

The best thing about opencode is you can build workflows that utilize different LLM's. If you JUST have an openai subscription then you can have an orchestrator running a small gpt model, when it needs to create an SDD and dependency map it could use the xhigh gpt5, then kick off that result to build an implementation plan to codex, and then code it up with codex. You would get almost the exact same results as using GPT5 xhigh, but at a much reduced cost. Enough of a reduced cost that you could then have a dialectical agent come in behind top level steps and validate results. The downside is that there is a lot of learning. If you use opencode I'd suggest also grabing some popular plugins to check out what is possibe such as oh my opencode. OMO is kind of heavy, so its debatable on if it's a good daily driver BUT it absolutely is a good example of things that can be done in the system.

I’m using codex with open code ChatGPT plus subscription and never going back.

reddit.com › r/opencodecli › any difference when using gpt model inside codex vs opencode?

r/opencodeCLI on Reddit: Any difference when using GPT model inside Codex vs OpenCode?

February 16, 2026 -

I'm a die-hard fan of OpenCode - because of free model, how easy it is to use subagents, and just because it's nice. But I wonder if anyone finds GPT models better in Codex? I cannot imagine why they could possibly work better there, but maybe models are just trained that way, so they "know" the tools etc? Anyone noticed anything like that?

I think both claude code and codex have some magic sauce to work better with their respective models. I personally think codex + 5.3 codex is way ahead of opencode + 5.3 codex. I'm realising now the harness matters just as much as the model these days.

This is what people mean when they say "the harness". Using it in codex means you get the bare bones experience. Not bad but it just means it isn't fine tuned to work specifically for coding /what you would want for coding at least. There's a concern for over engineering but that's why things are open source. Claudecode for example has a lot of changes to its system prompt to work well for everything Claude code will try to do like call mini agents and tools during it's execution. Codex afaik actually has nothing but I could be wrong. GitHub copilot has its own too supposedly tuned for multi model workflows, and opencode has their own as well. Imo all models work better in opencode. Sometimes this changes with select models, but it's a safe bet just to use opencode.

kevnu.com › home › ai › the ultimate comparison of claude code alternatives: a complete analysis of the 10 strongest cli ai programming tools

The Ultimate Comparison of Claude Code Alternatives

November 5, 2025 - Aider/OpenCode/Crush: Use your own API; depends on the provider. GitHub Copilot: Enterprise version guarantees it won't be used for training. Claude Code: Anthropic commits not to train on user data. Gemini CLI: Google commits not to train (check privacy settings).

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.