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dominik kundel

@dkundel • 25,244 subscribers

@OpenAI DevX, Codex, gpt-oss, TS Agents SDK - he/him - Opinions my own

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A practical use case for GPT-6 Astra's 3D capabilities: the era of personalized objects I needed a custom door stopper, took two pictures with a measuring tape next to it and fired off a prompt to ChatGPT Work. 10 minutes later I had a design that was fully printable and worked flawlessly.

A practical use case for GPT-6 Astra's 3D capabilities: the era of personalized objects I needed a custom door stopper, took two pictures with a measuring tape next to it and fired off a prompt to ChatGPT Work. 10 minutes later I had a design that was fully printable and worked flawlessly.

65,353 views

One of the coolest things with Codex for Chrome is combining it with subagents so you can test things like multiplayer games! Available for both macOS and Windows. Happy Codexing

One of the coolest things with Codex for Chrome is combining it with subagents so you can test things like multiplayer games! Available for both macOS and Windows. Happy Codexing

162,311 views

You can also create your own 💖 Turned my dog into a Codex pet 🙂 `$skill-installer hatch-pet` `$hatch-pet Create a little goblin`

You can also create your own 💖 Turned my dog into a Codex pet 🙂 `$skill-installer hatch-pet` `$hatch-pet Create a little goblin`

73,641 views

The Codex app-server is underrated! The prompt worked and 1.6k lines of Visual Basic later we have a fully working app including streaming and using your ChatGPT subscription And yes the actual Codex app for Windows is coming 🙂

The Codex app-server is underrated! The prompt worked and 1.6k lines of Visual Basic later we have a fully working app including streaming and using your ChatGPT subscription And yes the actual Codex app for Windows is coming 🙂

49,595 views

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I never use my iPhone’s camera button. So I made it call my dot. We just shipped dot widgets and Action button support on iOS. Here’s how to set those up, plus the Shortcuts trick I used for the camera button.
1:07
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I never use my iPhone’s camera button. So I made it call my dot. We just shipped dot widgets and Action button support on iOS. Here’s how to set those up, plus the Shortcuts trick I used for the camera button.

dominik kundel

565,122 views • 2 days ago

I built a new plugin! You can now trigger Codex from Claude Code! Use the Codex plugin for Claude Code to delegate tasks to Codex or have Codex review your changes using your ChatGPT subscription. Start by installing the plugin:
0:39
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I built a new plugin! You can now trigger Codex from Claude Code! Use the Codex plugin for Claude Code to delegate tasks to Codex or have Codex review your changes using your ChatGPT subscription. Start by installing the plugin:

dominik kundel

1,290,869 views • 6 months ago

A picture may be worth a thousand words, but editing one shouldn’t take a thousand-word prompt. Point at a character. Erase what should disappear. Comment where the title should change. Here’s the new image editing workflow in ChatGPT and Codex on desktop.
2:44
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A picture may be worth a thousand words, but editing one shouldn’t take a thousand-word prompt. Point at a character. Erase what should disappear. Comment where the title should change. Here’s the new image editing workflow in ChatGPT and Codex on desktop.

dominik kundel

223,660 views • 2 months ago

Yes, those are actual bricks, not just imagegen. GPT-6 Astra designed them in Bricklink Studio, then rendered this 4K video in Blender. Least practical but most fun. Parts lists if you want to build one:
0:40
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Yes, those are actual bricks, not just imagegen. GPT-6 Astra designed them in Bricklink Studio, then rendered this 4K video in Blender. Least practical but most fun. Parts lists if you want to build one:

dominik kundel

109,337 views • 1 month ago

You can now create and customize your dot directly from the ChatGPT mobile app! On top of that we shipped lots of improvements incl. better thread control tools and context for controlling Codex from your dot. More details:
0:38
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You can now create and customize your dot directly from the ChatGPT mobile app! On top of that we shipped lots of improvements incl. better thread control tools and context for controlling Codex from your dot. More details:

dominik kundel

17,821 views • 9 days ago

Web search is now enabled by default for the Codex CLI and IDE Extension 🎉 By default it will use a web search cache but you can toggle live results or if you use --yolo live results are enabled by default. More details in the changelog 👇
0:25
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Web search is now enabled by default for the Codex CLI and IDE Extension 🎉 By default it will use a web search cache but you can toggle live results or if you use --yolo live results are enabled by default. More details in the changelog 👇

dominik kundel

265,718 views • 8 months ago

Better answers = better reasoning
0:21
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Better answers = better reasoning

dominik kundel

109,279 views • 4 months ago

You should build your dream macOS app right now! The "Build macOS App" plugin in Codex is wild. Used voice dictation to build an app I wanted for a while in <7 min (+6 min of tweaking). Couldn't believe how quickly it was done. Prompt is in the video and in the tweet below.
3:00
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You should build your dream macOS app right now! The "Build macOS App" plugin in Codex is wild. Used voice dictation to build an app I wanted for a while in <7 min (+6 min of tweaking). Couldn't believe how quickly it was done. Prompt is in the video and in the tweet below.

dominik kundel

106,192 views • 5 months ago

💡 Small Codex tip: You don't have to be limited to looking at one thread at a time. 🪟 Open multiple full windows in parallel 💬 Use /side to fork a conversation to ask temporary follow ups 🛟 You can also set a hot key for the Codex pop up Window to quickly fire off new tasks
0:27
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💡 Small Codex tip: You don't have to be limited to looking at one thread at a time. 🪟 Open multiple full windows in parallel 💬 Use /side to fork a conversation to ask temporary follow ups 🛟 You can also set a hot key for the Codex pop up Window to quickly fire off new tasks

dominik kundel

109,303 views • 5 months ago

I put Codex into DOOM using Codex app server. Codex modified the actual game files and modified the game engine to render the terminal interface natively and have Codex engage with the game.
1:01
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I put Codex into DOOM using Codex app server. Codex modified the actual game files and modified the game engine to render the terminal interface natively and have Codex engage with the game.

dominik kundel

115,540 views • 6 months ago

With ChatGPT Atlas, every coding app is now a vibe coding app 😄
0:31
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With ChatGPT Atlas, every coding app is now a vibe coding app 😄

dominik kundel

186,346 views • 1 year ago

💡 Friday Codex tip: If you are using the Codex app and regularly find yourself copy and pasting text from error messages or plans from other apps into Codex to start a new task, you can use Raycast deeplinks to map it to a hotkey.
1:36
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💡 Friday Codex tip: If you are using the Codex app and regularly find yourself copy and pasting text from error messages or plans from other apps into Codex to start a new task, you can use Raycast deeplinks to map it to a hotkey.

dominik kundel

92,469 views • 7 months ago

Reminder: You can use Codex code review as part of your ChatGPT subscription 🙂 1. Head to 2. Connect your GitHub 3. Enable code review 4. Choose between review all PRs, just yours or trigger explicitly with "Codex magazine review this" To not spam you Codex will respond with 👍 unless it finds high priority items. You can use AGENTS.md to shape what a high priority item is.
0:38
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Reminder: You can use Codex code review as part of your ChatGPT subscription 🙂 1. Head to 2. Connect your GitHub 3. Enable code review 4. Choose between review all PRs, just yours or trigger explicitly with "Codex magazine review this" To not spam you Codex will respond with 👍 unless it finds high priority items. You can use AGENTS.md to shape what a high priority item is.

dominik kundel

89,178 views • 7 months ago

Can't go without an appropriate ad
0:37
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Can't go without an appropriate ad

dominik kundel

27,843 views • 1 month ago

💡 Codex Tip Create a local environment to have Codex auto install dependencies for your worktrees and create actions for quick access to common commands. Actions get executed in your integrated terminal so Codex can also access the terminal output. For iOS developers check out the iOS plugin that automatically sets up your actions to build and run your app!
1:02
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💡 Codex Tip Create a local environment to have Codex auto install dependencies for your worktrees and create actions for quick access to common commands. Actions get executed in your integrated terminal so Codex can also access the terminal output. For iOS developers check out the iOS plugin that automatically sets up your actions to build and run your app!

dominik kundel

68,470 views • 6 months ago

Used the updated Build Web Apps plugin that uses GPT-Image-2 to design a UI and assets to recreate Windows 3.1 incl. a virtual filesystem for the MS-DOS prompt. Naturally the next step was to use Browser Use to interact with it and play Minesweeper 😂 Note: Once the cursor is starting to move the video is unedited
1:20
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Used the updated Build Web Apps plugin that uses GPT-Image-2 to design a UI and assets to recreate Windows 3.1 incl. a virtual filesystem for the MS-DOS prompt. Naturally the next step was to use Browser Use to interact with it and play Minesweeper 😂 Note: Once the cursor is starting to move the video is unedited

dominik kundel

37,219 views • 5 months ago

I love when Codex outsmarts me! Asked Codex to hack this badge that I got from Temporal's conference by putting Codex pets on it. I also gave it a photo of the badge along with it. Codex found the actual firmware of the badge on GitHub to have a starter 😂
0:23
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I love when Codex outsmarts me! Asked Codex to hack this badge that I got from Temporal's conference by putting Codex pets on it. I also gave it a photo of the badge along with it. Codex found the actual firmware of the badge on GitHub to have a starter 😂

dominik kundel

35,125 views • 5 months ago

For our European friends 🎉 we are rolling out this week Codex for Chrome, Computer Use, Memories, and Chronicle in EU, EEA and UK. Here's a recap on how you can use Codex with Chrome and some more tips below 🧵
2:34
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For our European friends 🎉 we are rolling out this week Codex for Chrome, Computer Use, Memories, and Chronicle in EU, EEA and UK. Here's a recap on how you can use Codex with Chrome and some more tips below 🧵

dominik kundel

25,744 views • 4 months ago

How well do you still know your codebase? Had Codex build a little RepoGuessr game where you have to guess which file a certain line of code belongs to. You can try it with open source repos at: 👉
1:09
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How well do you still know your codebase? Had Codex build a little RepoGuessr game where you have to guess which file a certain line of code belongs to. You can try it with open source repos at: 👉

dominik kundel

32,935 views • 7 months ago