Javier @javidevio

Working on JS Training Grounds. Interim interim CEO at OpenAI. I write coding tutorials. js-training-grounds.netlify.app Joined December 2020

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Javier @javidevio

2 months ago

AI doomers after GPT-5:

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Javier @javidevio

2 months ago

I think OpenAI automatically switched all custom GPTs to GPT-5 too. They should've given people time to test and update their custom GPTs before making that change. 🫤

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Javier @javidevio

2 months ago

It seems like GPT-5 uses less emojis than 4o. 🫤

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Javier @javidevio

2 months ago

There's something off about AI demos. For example, you can just keep pressing the spacebar to jump over all the obstacles in the jumping ball game on this page: openai.com/index/introduc…

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Javier @javidevio

2 months ago

How long does it take to properly evaluate an AI model? 🤔 I imagine we have to wait at least a week to see how good GPT-5 really is. 24 hours isn't enough time.

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Javier @javidevio

3 months ago

Markdown-driven development

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Javier @javidevio

3 months ago

Scheming with GitHub Copilot 😈😇

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Javier @javidevio

4 months ago

I thought it would take a lot longer for companies to figure out how to generate video and audio together 😅 youtube.com/watch?v=mCFMn0…

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Javier @javidevio

8 months ago

We might be moving from prompt engineering into context engineering 🤔

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Javier @javidevio

9 months ago

Can AI do this? 🤨

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Javier @javidevio

9 months ago

What would you like to see me build/fix in 2025? 😀

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Javier @javidevio

9 months ago

If o3-mini is coming out in January and o3 is coming out soon after that... does that mean OpenAI is already working on o4/o5? 😅

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Javier @javidevio

9 months ago

2025 will be the last year to do anything interesting 🫤

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Javier @javidevio

a year ago

Just published the first blog post on simpledev.css, my mostly classless CSS framework dev.to/jhonkaman/intr…

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Javier @javidevio

a year ago

Claude Artifacts, Cursor, Replit Agent... what's the next big thing? 🤔

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I added more sections to the start page for simpledev.css showing the different modes it supports: - just light mode - just dark mode - light and dark mode - no JS simpledevio.github.io/simpledev-css/…