xAI has released Grok 3 and unveiled new capabilities for the Grok iOS
and web apps. The company used around 200,000 GPUs to train Grok
3


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TLDR 2025-02-18

THE BATTLE AGAINST BOTS: HOW TO PROTECT YOUR APP (SPONSOR) [4]

Modern bots are smarter than ever [5]Äexecuting JavaScript, storing
cookies, rotating IPs, and even cracking CAPTCHAs with AI. As attacks
grow more sophisticated, traditional detection just isn't enough.

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just a single JS script, you can instantly secure your signup flow
against brute force attacks, leaked credentials, and disposable
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Start protecting your app today with WorkOS Radar [4].

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BIG TECH & STARTUPS

ELON MUSK'S XAI RELEASES ITS LATEST FLAGSHIP MODEL, GROK 3 (5 MINUTE
READ) [7]

xAI has released Grok 3 and unveiled new capabilities for the Grok
iOS and web apps. The company used an enormous data center in Memphis
that contained around 200,000 GPUs to train Grok 3. Grok 3 is a family
of models: Grok 3 mini responds to questions more quickly but at the
cost of some accuracy; Grok 3, which beats GPT-4o on some benchmarks;
Grok 3 Reasoning, which surpasses the best investigation of o3-mini on
several popular benchmarks; and Grok 3 mini Reasoning. Subscribers to
X's Premium+ tier will be first to get access to Grok 3.

IPHONE 17 DESIGN WILL BE DRAMATICALLY DIFFERENT, SAYS LEAKER (2
MINUTE READ) [8]

A new leak claims that the iPhone 17 Air will have its cameras
arranged in a horizontal bar. The iPhone 17 Pro models will use a
larger but still horizontal bar. Along with the new camera layout,
it's been reported that the iPhone 17 Pro will return to having curved
sides. It is unclear how reliable or accurate the rumors are, but the
leaker has been accurate about camera details before.

¨

SCIENCE & FUTURISTIC TECHNOLOGY

FIRST 1.5-MILE STRETCH OF SAUDI'S AUDACIOUS LINE MEGACITY BEGINS TO
RISE (2 MINUTE READ) [9]

Construction has begun on the first phase of the Line, Saudi Arabia's
planned 170-kilometer-long megacity in the desert. The first phase,
which will stretch 2.5 kilometers, will be named Hidden Marina. It
will be made up of three individual modular segments measuring 21
million square meters. Hidden Marina will host an initial population
of around 200,000 residents. It will have 80,000 residential units,
9,000 hotel rooms, commercial and retail spaces, fire stations,
schools, police and security services, and other amenities. Residents
will have access to all daily essentials within a five-minute walk and high-speed rail will provide transit around the metropolis.

RESEARCHERS ARE TRAINING AI TO INTERPRET ANIMAL EMOTIONS (1 MINUTE
READ) [10]

Several teams around the world are working on AI systems to help
humans understand animals. A group at the University of the West of
England Bristol and Scotland's Rural College have developed a system
called Intellipig that examines photos of pigs' faces and notifies
farmers if there are signs of pain, sickness, or emotional distress,
and a team at the University of Haifa is training AI to identify signs
of discomfort in dogs' faces. These systems still rely on humans to do
the initial work of identifying the meanings of different behaviors.

¨

PROGRAMMING, DESIGN & DATA SCIENCE

VALIDATE YOUR SAAS IDEA WHILE BUILDING AN AUDIENCE (SPONSOR) [11]

Learn how to validate market demand for your next SaaS idea before
investing resources blindly. In this guide, we'll show you how to
capture intent and keep interested parties engaged as you build
towards your launch.

RUBY ON RAILS ON WEBASSEMBLY, THE FULL-STACK IN-BROWSER JOURNEY (19
MINUTE READ) [12]

WebAssembly allows server-side frameworks to run locally, blurring
the boundaries of classic web development and opening up exciting new possibilities. This post walks readers through how to create a Rails application that runs fully in your browser. It covers how to bring
Rails into the browser in 15 minutes, the behind-the-scenes of Rails wasmification, and the future of Rails and Wasm.

DEBUGGING AN UNDEBUGGABLE APP (31 MINUTE READ) [13]

This article discusses how to debug an app with anti-debugging
protections that blocked debuggers from being attached, caused an exit
when any code was injected, and crashed the whole phone when run with
jailbreak on. It walks through the steps of how to attach a debugger,
bypass jailbreak detection, and inject code. The article is detailed
and contains a lot of screenshots, logs, and code.

¨

MISCELLANEOUS

MY TIME AT MIT (2 MINUTE READ) [14]

Murat Demirbas, a principal research scientist at MongoDB Research,
spent a year at MIT's Computer Science department as a postdoc twenty
years ago. This post details his experience working with Professor
Nancy Lynch. Demirbas was young and he felt like he didn't make as
much of the experience as he could have. The post includes lessons
learned from the experience.

I WAS GIVEN EARLY ACCESS TO GROK 3 EARLIER TODAY, MAKING ME I THINK
ONE OF THE FIRST FEW WHO COULD RUN A QUICK VIBE CHECK (6 MINUTE READ)
[15]

Grok 3 has an around state-of-the-art thinking model that is able to
solve some advanced questions. It is likely somewhere around o1-pro in
terms of capability and ahead of DeepSeek-R1. DeepSearch can produce
high quality responses to various research- or lookup-type questions,
but it can still hallucinate information - even URLs. Overall, Grok 3
+ Thinking feels somewhere around the state-of-the-art territory of
OpenAI's strongest models, and slightly better than DeepSeek-R1 and
Gemini 2.0 Flash Thinking.

TLDR IS HIRING CURATORS FOR OUR NEW TLDR DATA NEWSLETTER (FULLY
REMOTE, $100/HR)

TLDR is hiring part time curators to launch our TLDR Data newsletter.

The ideal candidate would have deep experience working directly with
data warehouses, data pipelines, data lakes, and other modern cloud infrastructure.

Time commitment is ~2-3 HOURS/WEEK PAID AT A RATE OF $100/HR. To apply
please send your LinkedIn or resume to jobs@tldr.tech along with a
couple sentences on why you'd be a good fit!

¨

QUICK LINKS

INCREASE VELOCITY OF PLAYWRIGHT TEST AUTOMATION BY 5X (SPONSOR) [16]

Watch QA Wolf AI [17] generate a Playwright test for Figma's
prototyper in just 6 minutes compared to 29 minutes without AI.

WHAT ROLE DOES LLM REASONING PLAY FOR SOFTWARE TASKS? (10 MINUTE
READ) [18]

It is still unclear whether reasoning models are really as big of a
game changer for software development tasks as they are made out to
be.

SEARCHCODE.COM'S SQLITE DATABASE IS PROBABLY 6 TERABYTES BIGGER THAN
YOURS (6 MINUTE READ) [19]

searchcode.com's SQLite database is 6.4 gigabytes - this post
discusses how the project got to that size, the technologies it uses,
and why it uses SQLite.

THE NEW YORK TIMES HAS GREENLIT AI TOOLS FOR PRODUCT AND EDIT STAFF
(1 MINUTE READ) [20]

The New York Times is still in a lawsuit against OpenAI and Microsoft
as the tech companies allegedly violated copyright law by training
generative AI on the publisher's content.

TOWARDS COMPOSABLE DATA PLATFORMS (13 MINUTE READ) [21]

Open Table Formats enable a kind of virtualization - they allow for a
headless architecture where different platforms can bring their own
compute to the same data.

JAILBREAKING YOUR KINDLE (WEBSITE) [22]

Jailbreaking your Kindle will give you access to custom screensavers,
custom fonts, and more apps, but there are risks, such as potentially
voiding the Kindle's warranty and permanently breaking the device.

FIXI.JS (GITHUB REPO) [23]

fixi.js is an experimental minimalist implementation of generalized
hypermedia controls.

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Thanks for reading,
Dan Ni [28] & Stephen Flanders [29]

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[4] https://workos.com/radar?utm_medium=newsletter&utm_source=tldr-primary&utm_campaign=20250218
[5] https://workos.com/blog/what-is-device-fingerprinting-and-how-does-it-work?utm_medium=newsletter&utm_source=tldr-primary&utm_campaign=20250213
[6] https://workos.com/blog/radar?utm_medium=newsletter&utm_source=tldr-primary&utm_campaign=20250218
[7] https://techcrunch.com/2025/02/17/elon-musks-ai-company-xai-releases-its-latest-flagship-ai-grok-3/?utm_source=tldrnewsletter
[8] https://appleinsider.com/articles/25/02/17/iphone-17-design-will-be-dramatically-different-says-leaker?utm_source=tldrnewsletter
[9] https://newatlas.com/architecture/line-construction-update-first-phase-feb/?utm_source=tldrnewsletter
[10] https://techcrunch.com/2025/02/16/researchers-are-training-ai-to-interpret-animal-emotions/?utm_source=tldrnewsletter
[11] https://go.clerk.com/350jwxu?utm_source=tldrnewsletter
[12] https://web.dev/blog/ruby-on-rails-on-webassembly?utm_source=tldrnewsletter
[13] https://bryce.co/undebuggable/?utm_source=tldrnewsletter
[14] https://muratbuffalo.blogspot.com/2025/02/my-time-at-mit.html?utm_source=tldrnewsletter
[15] https://threadreaderapp.com/thread/1891720635363254772.html?utm_source=tldrnewsletter
[16] https://www.qawolf.com?utm_source=tldr&utm_medium=newsletter&utm_campaign=ACQ_All_Demo_Conversions__NewsletterAudience_-_Newsletter_PlaywrightTestAutomationVelocity_20250218-None_Experiment-FALSE&utm_term=headline-IncreaseVelocityOfPlaywrightTestAutomationBy5x&utm_content=5xFasterTestCreation_None_None_Headline%3AIncreaseVelocityOfPlaywrightTestAutomationBy5x_None_None_None_Newsletter-QuickLinks_20250218_v1
[17] https://www.qawolf.com/ai?utm_source=tldr&utm_medium=newsletter&utm_campaign=ACQ_All_Demo_Conversions__NewsletterAudience_-_Newsletter_PlaywrightTestAutomationVelocity_20250218-None_Experiment-FALSE&utm_term=body-QAWolf&utm_content=5xFasterTestCreation_None_None_Headline%3AIncreaseVelocityOfPlaywrightTestAutomationBy5x_None_None_None_Newsletter-QuickLinks_20250218_v1
[18] https://martinfowler.com/articles/exploring-gen-ai.html#memo-12?utm_source=tldrnewsletter
[19] https://boyter.org/posts/searchcode-bigger-sqlite-than-you/?utm_source=tldrnewsletter
[20] https://techcrunch.com/2025/02/17/the-new-york-times-has-greenlit-ai-tools-for-product-and-edit-staff/?utm_source=tldrnewsletter
[21] https://jack-vanlightly.com/blog/2025/2/17/towards-composable-data-platforms?utm_source=tldrnewsletter
[22] https://kindlemodding.org/jailbreaking/?utm_source=tldrnewsletter
[23] https://github.com/bigskysoftware/fixi?utm_source=tldrnewsletter
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[27] https://jobs.ashbyhq.com/tldr.tech
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