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bottlepalmyesterday at 6:49 PM7 repliesview on HN

I just ran it on a tough reverse engineering problem I'm having that neither Claude Code 4.8 or ChatGPT Codex 5.5 could figure out. 30 minutes later Fable has it all figured out perfectly.


Replies

jp0001yesterday at 9:21 PM

I asked it to write security tests for an app and I was downgraded to Opus 4.8. I'm approved for their cyber program!

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cedwsyesterday at 7:18 PM

How did it not immediately flag that up? Are you sure it wasn’t being silently routed to Opus?

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skerityesterday at 7:01 PM

Oh nice, it didn't flag the request? I feared any reverse engineering would become impossible because of the new safeguards.

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derangedHorseyesterday at 7:09 PM

For hard problems you’ll have to use the GPT 5.5 pro model (available via api if you don’t want to spend $100 on the monthly subscription)

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theragrayesterday at 9:00 PM

I want to test how it will handle e-bike software and hardware RE for my bike. Opus was really good for that, but still made some mistakes. With Fable, I hope I will be able to do a total RE of most components, hopefully including motor firmware to some extent.

Gamemaster1379today at 6:51 AM

I had a similar experience. I have a complex RE implementation that has. A lot of layers. 4.8 struggled for weeks. 40 minutes on Fable and I may now have the most performant way to play Tomba on the planet.

moffkalasttoday at 2:41 PM

Yeah I threw my hardest problem at it as well, some convoluted satellite tile reprojection and culling issue in canvas rendering. It took some back and forth for some specifics but it ended up writing a quarter of pyproj in JS from memory and the end result straight up works lmao.