OpenAI Codex CLI: Lightweight coding agent that runs in your terminal

Cool to see more interesting terminal based options! Looking forward to trying this out.

I've been working on something related—Plandex[1], an open source AI coding agent that is particularly focused on large projects and complex tasks.

I launched the v2 a few weeks ago and it is now running well. In terms of how to place it in the landscape, it’s more agentic than aider, more configurable and tightly controlled than Devin, and more provider-agnostic/multi-provider/open source than Claude Code or this new competitor from OpenAI.

I’m still working on getting the very latest models integrated. Gemini Pro 2.5 and these new OpenAI models will be integrated into the defaults by the end of the week I hope. Current default model pack is a mix of Sonnet 3.7, o3-mini with various levels of reasoning effort, and Gemini 1.5 Pro for large context planning. Currently by default, it supports 2M tokens of context directly and can index and work with massive projects of 20M tokens and beyond.

Very interested to hear HN’s thoughts and feedback if anyone wants to try it. I'd also welcome honest comparisons to alternatives, including Codex CLI. I’m planning a Show HN within the next few days.

1 - https://github.com/plandex-ai/plandex

People are downvoting you for self promotion. But I will try it. I’m very interested in agentic assistants that are independent. Aider is my go-to tool but sometimes I just want to let a model rip through a code base.

Thanks, I tried to tone down the self promotion. To be completely honest, I was up all night coding so I'm not quite at 100% at the moment lol. I have massive respect for OpenAI and didn't mean to to try to distract from their launch. Sorry to anyone I annoyed!

I really appreciate your willingness to try Plandex and look forward to hearing your feedback! You can ping me in the Plandex Discord if you want—would love to get more HNers in the channel: https://discord.com/invite/plandex-ai

Or email me: dane@plandex.ai

Insane that people would downvote a totally reasonable comment offering a competing alternative. HN is supposed to be a community of tech builders.

I would wager a sizeable chunk of the people here have no idea about the nature of this site's ownership/origin. This crowd finds this sort of thing to be a sort of astro-turfing - not communal.

edit: And I can't say I disagree.

RE: the local/open-source version: Use your own OpenAI, OpenRouter.ai, and other OpenAI-compatible provider accounts.

^^ could I put in my free Gemini key so as to use Gemini Pro 2.5 ? I'm a bit beginner with everything around BYOB. Thanks..

How does it compare to ANUS and OpenHands?

Decided to just go ahead and post the Show HN today: https://news.ycombinator.com/item?id=43710576

It'a github link for an MIT-licensed project...

If the community considers that astroturfing, we have completely lost the plot what building is.

The MIT license is basically the license of choice for growth hacking these days. Many VC backed companies follow this strategy - it serves to grow your userbase, a free-tier for developers using your ecosystem and last but not least, a chance for volunteers to do free work for you.

This is perhaps too cynical for this specific instance, but it's not overly cynical more broadly. Considering users of the site have to evaluate many of these offerings frequently, I don't blame them for having a negative gut reaction.

I usually downvote this kind of post in other people's Show HN but in a product from OpenAI I'm glad other projects use the post to gain visibility.

> and didn't mean to to try to distract from their launch.

you should, that is the biggest reason I upvoted.

what

Those are AI coding agents.