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GPT-5.5: Mythos-Like Hacking, Open to All

https://xbow.com/blog/mythos-like-hacking-open-to-all
35•rs_rs_rs_rs_rs•5h ago

Comments

nsingh2•1h ago
These plots are terrible. Why is categorical data connected across categories with lines? Why not just use bar plots?

Like in the "Web Vulns in OSS" plot, white box data for Opus 4.7 is not available, but the absurd linear interpolation across categories implies it should be near 60.

scottyah•1h ago
It's just an ad thinly disguised as useful data.
wmf•1h ago
I think the x axis is meant to be time but they screwed it up.
strange_quark•1h ago
Wasn't it already confirmed that small open-weight models were able to detect most of the same headline vulns as mythos? How is this any different?
nardons•1h ago
Do you have a source for this? Not doubting it, but I would like to have something concrete the next time the Mythos horse manure is cited.
stanfordkid•58m ago
No, they are able to detect errors when pointed at them but they have a lot of false positives... making them functionally useless for a large unknown codebase. They also can't build and run an exploit post-identification. Mythos can find vulnerabilities (purportedly) and actually validate them by building and running exploits. This makes it functional and usable for hacking.
mertcikla•1h ago
why does this read like an openai ad?
WhiteDawn•21m ago
First you need to get through the safety net. I’ve had many productive gpt5.4 sessions hit a roadblock of “ethicality” and pollute the context with multiple rounds of trying to convince it to continue

GPT-5.5

https://openai.com/index/introducing-gpt-5-5/
973•rd•5h ago•623 comments

Bitwarden CLI compromised in ongoing Checkmarx supply chain campaign

https://socket.dev/blog/bitwarden-cli-compromised
602•tosh•9h ago•281 comments

MeshCore development team splits over trademark dispute and AI-generated code

https://blog.meshcore.io/2026/04/23/the-split
135•wielebny•6h ago•81 comments

Show HN: Tolaria – open-source macOS app to manage Markdown knowledge bases

https://github.com/refactoringhq/tolaria
40•lucaronin•1h ago•15 comments

An update on recent Claude Code quality reports

https://www.anthropic.com/engineering/april-23-postmortem
514•mfiguiere•5h ago•388 comments

My phone replaced a brass plug

https://drobinin.com/posts/my-phone-replaced-a-brass-plug/
61•valzevul•7h ago•7 comments

Show HN: Agent Vault – Open-source credential proxy and vault for agents

https://github.com/Infisical/agent-vault
48•dangtony98•1d ago•12 comments

I am building a cloud

https://crawshaw.io/blog/building-a-cloud
960•bumbledraven•18h ago•477 comments

Incident with multple GitHub services

https://www.githubstatus.com/incidents/myrbk7jvvs6p
192•bwannasek•7h ago•93 comments

TorchTPU: Running PyTorch Natively on TPUs at Google Scale

https://developers.googleblog.com/torchtpu-running-pytorch-natively-on-tpus-at-google-scale/
18•mji•2h ago•1 comments

U.S. Soldier Charged with Using Classified Info to Profit from Prediction Market

https://www.justice.gov/usao-sdny/pr/us-soldier-charged-using-classified-information-profit-predi...
48•paulpauper•1h ago•15 comments

UK Biobank health data keeps ending up on GitHub

https://biobank.rocher.lc
50•Cynddl•9h ago•13 comments

Palantir employees are starting to wonder if they're the bad guys

https://www.wired.com/story/palantir-employees-are-starting-to-wonder-if-theyre-the-bad-guys/
626•pavel_lishin•6h ago•448 comments

Girl, 10, finds rare Mexican axolotl under Welsh bridge

https://www.bbc.com/news/articles/c9d4zgnqpqeo
158•codezero•4h ago•114 comments

Your hex editor should color-code bytes

https://simonomi.dev/blog/color-code-your-bytes/
479•tobr•2d ago•140 comments

Astronomers find the edge of the Milky Way

https://skyandtelescope.org/astronomy-news/astronomers-find-the-edge-of-the-milky-way/
68•bookofjoe•5h ago•12 comments

A programmable watch you can actually wear

https://www.hackster.io/news/a-diy-watch-you-can-actually-wear-8f91c2dac682
119•sarusso•2d ago•63 comments

Show HN: Honker – Postgres NOTIFY/LISTEN Semantics for SQLite

https://github.com/russellromney/honker
219•russellthehippo•11h ago•51 comments

French government agency confirms breach as hacker offers to sell data

https://www.bleepingcomputer.com/news/security/french-govt-agency-confirms-breach-as-hacker-offer...
341•robtherobber•7h ago•120 comments

Advanced Packaging Limits Come into Focus

https://semiengineering.com/advanced-packaging-limits-come-into-focus/
26•PaulHoule•2d ago•5 comments

Using the internet like it's 1999

https://joshblais.com/blog/using-the-internet-like-its-1999/
85•joshuablais•3h ago•57 comments

Writing a C Compiler, in Zig (2025)

https://ar-ms.me/thoughts/c-compiler-1-zig/
129•tosh•14h ago•36 comments

I spent years trying to make CSS states predictable

https://tenphi.me/blog/why-i-spent-years-trying-to-make-css-states-predictable/
39•tenphi•11h ago•8 comments

Arch Linux Now Has a Bit-for-Bit Reproducible Docker Image

https://antiz.fr/blog/archlinux-now-has-a-reproducible-docker-image/
292•maxloh•21h ago•102 comments

WireGuard for Windows Reaches v1.0

https://lists.zx2c4.com/pipermail/wireguard/2026-April/009580.html
82•zx2c4•2d ago•4 comments

Alberta startup sells no-tech tractors for half price

https://wheelfront.com/this-alberta-startup-sells-no-tech-tractors-for-half-price/
2130•Kaibeezy•1d ago•730 comments

A Renaissance gambling dispute spawned probability theory

https://www.scientificamerican.com/article/how-a-renaissance-gambling-dispute-spawned-probability...
96•sohkamyung•2d ago•15 comments

Jiga (YC W21) Is Hiring

https://jiga.io/about-us/
1•grmmph•11h ago

If America's so rich, how'd it get so sad?

https://www.derekthompson.org/p/if-americas-so-rich-howd-it-get-so
397•momentmaker•7h ago•717 comments

Isopods of the world

https://isopod.site/
141•debesyla•3d ago•50 comments