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3. OpenAI Codex

Codex alternative

# Buildful vs OpenAI Codex

Codex is OpenAI's coding agent, included with ChatGPT plans. It runs on your computer or in OpenAI's cloud, where it can open a pull request. Buildful takes a described change and hands you a tested pull request; UI changes come with a recording.

1,000 tasks for $10 a month. About a cent a task. 

[Start building ](https://buildful.ai/signup) 

Your first 3 tasks are free. No card needed.

Stay 

## Stay with OpenAI Codex if

- You already pay for ChatGPT and use it for more than code.
- You like steering an agent step by step, in your own terminal or editor.
- You want OpenAI's models in OpenAI's own tools.

Switch 

## Switch to Buildful if

- You'd rather the agent worked in its own cloud machine than on your computer.
- You want your tests run on every change, and every UI change tried in a real browser and recorded.
- You want a set monthly price: 1,000 tasks for $10.

[Try it on your repo ](https://buildful.ai/signup) First 3 tasks free 

At a glance

## How OpenAI Codex and Buildful compare

__OpenAI Codex and Buildful, side by side__
| Compared on       | OpenAI Codex                                                                                                    | Buildful                                                                                                                                                                |
| ----------------- | --------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Price             | Included with ChatGPT. Plus is $20 a month, with limits per 5-hour window and weekly limits too. Pro from $100. | Pro is $10 a month for 1,000 tasks. Team is $40 for 3,000\. Free to try with 3 tasks.                                                                                   |
| Where it runs     | On your computer, or in OpenAI's cloud on Plus and up.                                                          | In a private cloud sandbox, one per task, deleted when the task ends. Nothing runs on your computer.                                                                    |
| To get started    | Install the app or CLI, or connect GitHub to Codex in the cloud.                                                | Sign up and connect a GitHub repo.                                                                                                                                      |
| Models            | OpenAI's GPT models.                                                                                            | Buildful picks the right open-weight model for each task. On Pro and Team, pick a frontier model yourself, like Claude or GPT, with prepaid credit or your own API key. |
| What you get back | Changes in your local files, or a pull request from a cloud task.                                               | A pull request on your GitHub repo, ready to review and merge.                                                                                                          |
| Testing           | Runs the checks you ask for. The desktop app can click through your app in a browser.                           | Runs your repo's checks, then tests UI changes in a real browser and records it.                                                                                        |
|                   |                                                                                                                 | [Try it on your repo ](https://buildful.ai/signup) Your first 3 tasks are free. No card needed.                                                                         |

### Compare Buildful with other tools

[vs Claude Code →](https://buildful.ai/compare/claude-code) [vs Cursor →](https://buildful.ai/compare/cursor) [vs Lovable →](https://buildful.ai/compare/lovable) [vs Replit →](https://buildful.ai/compare/replit) [vs Emergent →](https://buildful.ai/compare/emergent) [vs Base44 →](https://buildful.ai/compare/base44) [vs Bolt →](https://buildful.ai/compare/bolt) [vs GitHub Copilot →](https://buildful.ai/compare/github-copilot) [vs v0 →](https://buildful.ai/compare/v0) [vs Windsurf →](https://buildful.ai/compare/windsurf) [vs Devin →](https://buildful.ai/compare/devin) [All comparisons](https://buildful.ai/compare) 

Why we built Buildful

## Great software shouldn't depend on who can afford a $200 subscription.

- A model chosen for each task Buildful picks the right open-weight model for each one. Frontier models, whenever you choose.
- Your repos, your pull requests Every change is a pull request on your GitHub. One task can change several repos, one PR each. Nothing reaches main without you.
- Tested before you merge Your checks run, and every UI change is tested in a real browser and recorded.

Tasks can also start from Slack or Linear 

Switching from OpenAI Codex

## Frequently asked questions

Can Buildful use GPT? 

Yes, on Pro and Team: pick GPT yourself with prepaid credit, or bring your own OpenAI key. The tasks included in your plan run on the open-weight model Buildful picks for each one.

Can I use Buildful and Codex together? 

Yes. Both work on your GitHub repo. Keep Codex for work you want to steer yourself and hand the rest to Buildful.

Do I need to install anything? 

No. Buildful runs every task in a private cloud sandbox. You need a browser and a GitHub repo.

What happens to my repo? 

Buildful works on a new branch and opens a pull request. Nothing reaches your main branch until you review the change and merge it.

[Start building ](https://buildful.ai/signup) 

Your first 3 tasks are free. No card needed.

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Source: https://buildful.ai/compare/codex