A father and hexdump tattoo owner. Opinions are my own, except when they are my wife's. he/him.

Israel
Joined November 2008
Shahar Tal retweeted
"Revisiting SecureROM Adventures". Talk is about the SecureROM and an usbliter8 variant by iH8sn0w hexacon.fr/conference/speake…
2
20
141
8,426
Shahar Tal retweeted
Once again, I had to explain to Codex why the code it wrote was a C++ slopfest, then force it to optimize it for 10 hours straight until it achieved a 200× speedup. I asked it to self-reflect on the whole thing and write down. TBH, this is a gold mine:🧵
41
37
8
1,398
132,829
Shahar Tal retweeted
New exploit: “xor dword [0xf80c2094], 1<<22” Unlocks CPU microcode, the platform security processor, system management mode, and every internal processor register, all at once, on 100 million AMD CPUs. As far as I can tell can’t be fixed. github.com/xoreaxeaxeax/skit…
167
1,073
184
8,171
1,100,217
Shahar Tal retweeted
Opus 5 is a great model for coding, data analysis, design, biology, knowledge work. More than any of these eval scores, what is most exciting to me is something else: Opus 5 is our least prompt injectable model yet. It is a bit buried in the system card, but across PI evals and red teaming, Opus 5 is very hard to prompt inject successfully. And when layering defenses -- strong model alignment, combined with prompt injection probes, combined with Auto Mode in Claude Code -- the success rate for prompt injection attacks drops to ~0. This is new and exciting! More about this soon. www-cdn.anthropic.com/c5fbac…
Replying to @claudeai
On several coding and knowledge work evaluations, Opus 5 is the new state-of-the-art:
347
462
77
6,191
713,132
Shahar Tal retweeted
These are the real numbers of Israeli @BlackHatEvents #BHUSA talks and speakers, thanks to @StAJect0r Also a lot of interesting other trends in the Israeli security community stavc.github.io/blackhat-il-… @doritsos @meirorbach @amitaiz
Went through the @BlackHatEvents #BHUSA schedule - now I've got serious FOMO. Tons of great talks, nice balance of veterans (e.g. @albinowax @natashenka @hdmoore @hasherezade @vanhoefm) & new faces. Israeli 🇮🇱 speakers roughly 30% overall, 50% in AI 👀 blackhat.com/us-26/briefings…
2
1
1
9
3,252
Gotta love the LLMs' standard response - because it's exactly what any mathematician would say if you showed up with this out of the blue.
hello there the jacobian conjecture is false thanx to my close friend akhil for asking about it and my other close friend fable for working during the world cup final ((1+xy)^3 z + y^2 (1+xy) (4+3xy), y + 3 x (1+xy)^2 z + 3 x y^2 (4+3xy), 2 x - 3 x^2 y - x^3 z): \C^3\to \C^3, has jacobian determinant -2, and sends (0, 0, -1/4), (1, -3/2, 13/2), and (-1, 3/2, 13/2) to (-1/4, 0, 0)
44
148
28
4,672
602,380
Shahar Tal retweeted
hello there the jacobian conjecture is false thanx to my close friend akhil for asking about it and my other close friend fable for working during the world cup final ((1+xy)^3 z + y^2 (1+xy) (4+3xy), y + 3 x (1+xy)^2 z + 3 x y^2 (4+3xy), 2 x - 3 x^2 y - x^3 z): \C^3\to \C^3, has jacobian determinant -2, and sends (0, 0, -1/4), (1, -3/2, 13/2), and (-1, 3/2, 13/2) to (-1/4, 0, 0)
1,699
5,383
3,151
43,805
40,100,282
Shahar Tal retweeted
Thank you, @tomocchino, for the shout-out at @vercel Ship New York! Two months ago, we announced a partnership with Vercel to solve the trust problem that was holding AI agents back. Together with Vercel’s Chat SDK, we integrated the first approval system to give humans the final call on every agent action, delivered natively in Slack, WhatsApp, Teams, and a dozen other messaging channels. Appreciate the love from a great partner 🩵🖤
1
2
4
25
5,534
Shahar Tal retweeted
If you thought AI progress was slowing down, well here's the immediate answer to that. Huge jump in capability across the board. This is going to deliver major improvement in agents across almost all knowledge work categories.
Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use. Its capabilities exceed those of any model we’ve ever made generally available.
74
77
11
667
153,506
"You cannot govern a technology you have only been briefed on." Dr. @VivianBala's challenge to his fellow legislators has become a global rallying cry. Last week, @takahiroanno, leader of Japan's @team_mirai_jp, cited Minister Balakrishnan's hands-on use of @NanoClaw_ai in a parliamentary debate and offered to personally tutor the Prime Minister on setting it up. The PM said yes. Officially volunteering to fly out and set NanoClaw up for Japan's PM myself. Offer extends to any head of state whose country has good food.
22
32
28
298
103,406
Shahar Tal retweeted
Introducing NanoCo, our enterprise offering from the team behind @NanoClaw_AI, backed by a $12M seed round led by Valley Capital Partners, with participation from Docker, Vercel, Monday.com, Hugging Face's Clem Delangue, and many more incredible investors.
2
2
3
798
Shahar Tal retweeted
Today, we share a breakthrough on the planar unit distance problem, a famous open question first posed by Paul Erdős in 1946. For nearly 80 years, mathematicians believed the best possible solutions looked roughly like square grids. An OpenAI model has now disproved that belief, discovering an entirely new family of constructions that performs better. This marks the first time AI has autonomously solved a prominent open problem central to a field of mathematics.
1,205
3,726
1,772
26,294
13,804,452
Shahar Tal retweeted
We are investigating unauthorized access to GitHub’s internal repositories. While we currently have no evidence of impact to customer information stored outside of GitHub’s internal repositories (such as our customers’ enterprises, organizations, and repositories), we are closely monitoring our infrastructure for follow-on activity.
1,615
5,134
3,166
24,854
13,931,348
Shahar Tal retweeted
Personal update: I've joined Anthropic. I think the next few years at the frontier of LLMs will be especially formative. I am very excited to join the team here and get back to R&D. I remain deeply passionate about education and plan to resume my work on it in time.
7,869
10,914
7,550
148,909
28,084,293
Shahar Tal retweeted
With the help of Claude Mythos Preview, the Firefox team fixed more security bugs in April than in the past 15 months combined.
334
1,226
313
15,233
1,499,953
Shahar Tal retweeted
Your reminder that with @Docker and OneCLI, your NanoClaw agent has actual guardrails 👋 Docker gives your agent an isolated container to run in, and OneCLI gives it fake keys instead of real ones. It’s that simple! Don’t let your agent call the shots.
2
35
4,051
Shahar Tal retweeted
We’re introducing the Cursor SDK so you can build agents with the same runtime, harness, and models that power Cursor. Run agents from CI/CD pipelines, create automations for end-to-end workflows, or embed agents directly inside your products.
402
796
457
8,654
3,056,674
Shahar Tal retweeted
Time to talk about this one. CopyFail (CVE-2026-31431) — a 732-byte Python script that roots every Linux distro shipped since 2017. 🧵
a567d09b15f6e4440e70c9f2aa8edec8ed59f53301952df05c719aa3911687f9 👀
42
449
79
2,708
747,848
Shahar Tal retweeted
✨ Announcing NanoClaw v2, in partnership with @vercel. We completely rebuilt how NanoClaw agents communicate with the outside world. v2 brings agent-to-agent communication, human-in-the-loop-approvals, support for 15 messaging platforms, and more. A thread on what's new:
54
106
59
961
208,793
Shahar Tal retweeted
Claude code source code has been leaked via a map file in their npm registry! Code: pub-aea8527898604c1bbb12468b…
3,261
7,305
5,312
47,696
35,906,990