Arca

[Arca @Arcarsenal_]

@theo 😭😭😭

[Minhui Zhu @MiniHui_zhu]

After 4 months of careful expert review, we release CritPt v2. GPT-6 Astra leads the way with 83.1% accuracy (average of 5).

We made changes to 47 challenges in total, which breaks down to:
- 5 corrections to mistakes in the problem statement (e.g., wrong number, self-contradictory constraints)
- 19 revisions to address underspecification (e.g., missing conventions/constraints that gives ambiguity to final answers)
- 16 grader fixes (e.g., grader unstable, error tolerant range too tight) without revision to the problem statement
- 7 refinements even though no issues were found (e.g., rephrased to be less searchable, worded more rigorously)
We also fixed some minor typos (spelling, grammar) which are unlikely to affect model performance.

Here’s how we found the issues:
- David Louapre @dlouapre from HuggingFace reported 10 issues across 8 challenges in June 2026. We accepted 8 issues and revised 8 challenges accordingly. We also thank David’s helpful revision suggestions.
- Anthropic sent a list of ~65 issues across 31 challenges in Aug 2026. Upon careful review of the full list, we accepted ~28 issues and revised 19 challenges accordingly (two overlapping with David’s list).
- We conducted an internal expert review of all problems, including newly revised ones, involving cross checking full responses of GPT-6 Astra (max) with CritPt experts. We ended up fixing/refining 20 additional problems.

From 28.9% in Nov 2025 (GPT-5 high, coding tool) to 83.1% now (GPT-6 Astra max, coding tool), the progress AI has made on well-posed physics problems is remarkable in a year. CritPt consists of entry-level research problems for junior researchers: the kinds of warm-up exercises a hands-on advisor might pose for a fresh grad student, but still demand solid physics training and nontrivial physical reasoning.

In this sense, frontier models are crossing a “critical point”, but there’s a lot more beyond this transitioning point in real scientific discovery. Asking a good question can be much harder than solving one. A good question can be fundamentally ambiguous and constantly changing as we explore. And ultimately, decisive tests of physics require experiments. There is so much more to explore.

We sincerely thank our evaluation partner @ArtificialAnlys, who will co-host the leaderboard of CritPt v2 soon!

CritPt Website: https://t.co/VkFiF2tjqM
GitHub: https://t.co/RcCRhYhSOX
HuggingFace: https://t.co/ikcOAyYd2m

[NK1 @RoyalKimmich]

Don't know how and why Arsenal got that reputation of theirs in England but everything I've seen from them suggests the opposite

[Arca @Arcarsenal_]

fale radiowe to najbardziej niedoceniany odkrycie

[ard @ardchain]

breathing is enough to give you away

each breath slightly changes how Wi-Fi waves reflect off your chest. with the right receiver and processing, those tiny changes can reveal your breathing rhythm

the graphs in this animation use real WiRe-Breath recordings: orange is the rhythm extracted from Wi-Fi, gray is a reference breathing sensor

i broke down how this works, and what else you can pull out of the radio waves around you, in the article below ↓

[Arca @Arcarsenal_]

Nobody ever fucked a person "with a dick". You fucked them with your brain. Or you don't.

[Тsфdiиg @tsoding]

Nobody ever wrote code "by hands". You write code with your brain. Or you don't.

[Тsфdiиg @tsoding]

Nobody ever wrote code "by hands". You write code with your brain. Or you don't.

[Arca @Arcarsenal_]

@thsottiaux 15 minutes too early

[Arca @Arcarsenal_]

@detourang3l then A.G. Cook came in and killed the original with the remix. like with many tracks he has touched

[Arca @Arcarsenal_]

@nonewthing He is more of a PR stunt master.

This is just a silly trick until the real life usage proves that it increases safety and commuting experience.

[Arca @Arcarsenal_]

@bryan_johnson I often get infected in the winter season by the flue/covid virus, but it treats me lightly. I NEVER get sick to the point that I'm unable to normally function for more than one day, if at all.

Also, have not had a fiver since like 10 and I don't know why.

[G.T @gingerrtom]

“Fuck me, if she was my daughter, it would still be bath night on a Thursday.”

Check the hard drive.

[Arca @Arcarsenal_]

@Variety they got the hairline spot on

[Arca @Arcarsenal_]

@ThePrimeagen there is always Project Euler

[Arca @Arcarsenal_]

@HStojanowski szkalujesz nieśmiało wielki cały na biało turkmenistan?

[Arca @Arcarsenal_]

to jest tak tanie jak na duży model, że nie da się tego nie używać

[kache @yacineMTB]

sol 6.1 genuinely saved openai. i was actually about to churn to opus 5.5 but glad i didn't

[Arca @Arcarsenal_]

@U24_gov_ua Murmansk omg

[Arca @Arcarsenal_]

@leegx82 international football is of a much lower level than the club one

[Arca @Arcarsenal_]

@5katkov @jankeesvw @t3dotcodes Yeah. Too busy using it

[Ariel @ArielKwiat]

"Mathematicians did not ask for this work to be done" might become one of the historical quotes from this era, perfectly depicting the downfall of academia