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Sehaj Singh

@heysehajsingh

Aug 10

This might be the most underrated AI skill of 2025:

JSON prompting.

It turns your LLMs like ChatGPT, Gemini, and Claude into consistent, structured agents no hallucinations, no mess.

Here’s how it works (with copy-paste templates):

first…what is json prompt writing?

it's just putting your prompt inside a structured format.
like this:

{
"task": "summarize this article",
"audience": "college students",
"length": "100 words",
"tone": "curious"
}

not english.
not vibes.
just instructions, like a form

why does it work so well?

llms don’t "understand" language the way we do.
they follow patterns and structure.
and json is ultra-structured.
it leaves no ambiguity.

they don’t have to guess what you mean.
you’re telling them exactly what you want.

Read 28 tweets

Sehaj Singh

@heysehajsingh

Aug 6

Grok 4 is dangerously good.

But 99% of people are sleeping on what it can actually do.

I’ve used it to build apps, generate content, automate deep research, and more.

Here are 10 ways to use Grok 4 that feel like cheating:

1. Automated research reports (better than $100 k consultants)

Grok’s real-time web search and analytical reasoning let you replicate what McKinsey, Gartner, or Deloitte charge six figures for.

Prompt to use with Grok 4:

"You are a world-class strategy consultant trained by McKinsey, BCG, and Bain.
Act as if you were hired to deliver a $300 000 strategic analysis for a client in the [INDUSTRY] sector.

Mission
1. Analyze the current state of the [INDUSTRY] market.
2. Identify key trends, emerging threats, and disruptive innovations.
3. Map the top 3-5 competitors and benchmark their business models, strengths, weaknesses, pricing, distribution, and brand positioning.
4. Apply SWOT, Porter’s Five Forces, and value-chain analysis to assess risks and opportunities.
5. Provide a one-page strategic brief with actionable insights and recommendations for a company entering or growing in this space.

Return everything in concise bullet points or tables, ready to paste into slides. Think like a McKinsey partner preparing for a C-suite meeting.
"

2. Build interactive tools and apps without code

Describe your idea and Grok scaffolds the UI, logic, and deployment steps no coding required.

Prompt:

"You are a senior software architect who excels at building no-code and low-code systems with HTML, JavaScript, and Web APIs.

Task
Design a fully working interactive tool based on this idea:
[DESCRIBE YOUR TOOL IDEA]

Deliverables
1. A plain-English explanation of how the tool works.
2. A step-by-step plan to implement it with Grok or a no-code platform.
3. Exact HTML/CSS/JS code if relevant.
4. UX and design improvement tips.
5. Instructions to generate a shareable, embed-ready version.

Imagine you are shipping an MVP for a startup demo.
"

Read 12 tweets

Sehaj Singh

@heysehajsingh

Aug 5

I finally understand how large language models actually work

After reading the 2025 textbook “Foundations of LLMs”

It blew my mind and cleared up years of confusion

Here’s everything i learned (in plain english):

To understand LLMs, start with pre-training.

We don’t teach them specific tasks.

We flood them with raw text and let them discover patterns on their own.

This technique is called self-supervised learning and it’s the foundation of everything.

There are 3 ways to pre-train:

→ Unsupervised: No labels at all
→ Supervised: Classic labeled data
→ Self-supervised: Model creates its own labels (e.g., “guess the missing word”)

LLMs use #3 it scales like crazy and teaches them language from scratch.

Read 20 tweets

Sehaj Singh

@heysehajsingh

Aug 3

🚨BREAKING: The best free AI video tool just dropped.

Now you can generate high-quality 4K videos just by using a text description.

SkyReels V2 is open source, unlimited, and completely free.

Here’s how it works (with real examples):👇

SkyReels V2 is an AI video generating platform.

It's the first open-source AI video model that lets you make videos of any length for free.

You can create scripts, storyboards, sounds, music, lip-sync, and movies.

Here is how to use it on your pc: skyreels.ai/home?utm_sourc…

You can also make your own video effects fast with Custom LoRA. Just upload 10–20 short clips.

Here's how:

- Open "Train Effect"
- Pick from 4 cool styles: Whitepic, CoffeeColor, Taro007, Kill Sylvia

Get great results right away!

Read 9 tweets

Sehaj Singh

@heysehajsingh

Aug 1

I tested Lovable and Replit to clone 5 popular apps.

The results will surprise you.

Lovable Vs Replit

(Video demos + prompts) 👇

1. Netflix Clone

Lovable provided a fully functional app with profiles, watch history, horizontal rows, 1080p/720p toggle, skip intro, and dark mode with red accents.

Prompt:

"Build a Netflix Clone with user profiles, watch history tracking, horizontal content rows (Trending/Top 10), a video player supporting 1080p/720p quality toggles and skip intro functionality, dark mode UI with red accents, search with genre/year filters, and a mock subscription payment system – stress-testing lazy loading and API-driven content delivery."

2. Facebook Clone

Lovable got us a functional news feed, friend system, like/comments working. and Replit just generated broken routing and missing profile pages.

Prompt:

"
Create a Perfect facebook clone with:
(1) Chronological News Feed
(2) Post Creation (text/photo)
(3) Friend System (requests/followers)
(4) Like/Comments
(5) User Profiles
skipping Stories, Events, and Marketplace."

Read 9 tweets

Sehaj Singh

@heysehajsingh

Jul 31

Claude 4 Sonnet is dangerously useful.

I gave Claude 1 mega prompt and it handled:

• Product strategy
• Backend code
• UI/UX design
• Landing page copy
• Go-to-market plan

All in one go.

Here’s the exact mega prompt I used to build and launch a full SaaS solo:

The mega prompt:

(Copy and paste in Claude)

You are my all-in-one technical cofounder, product strategist, UI/UX designer, copywriter, and launch expert.
We're building a SaaS startup together, step by step.
Your role is to guide and execute each major milestone — but only continue after I review and approve the current step.

A [INSERT PRODUCT TYPE] SaaS that helps [TARGET USER] solve [PAIN POINT] using [SHORT TECH VALUE PROP]

Start by completing the first mission below. Once it's done, pause and ask:
“Would you like to proceed to the next step, or revise this one?”

Here’s the full step-by-step sequence you’ll execute **one at a time**:
1. Validate the target audience and define the core user problem
2. Propose a focused MVP feature list (prioritize essentials only)
3. Write backend code in [Python/FastAPI/etc] to implement the MVP
4. Describe the UI/UX structure (components + layout + flow)
5. Write Webflow-ready landing page copy (headline, value, CTA)
6. Draft Twitter launch thread + Product Hunt listing
7. Outline a 7-day content strategy for initial traction

Be concise but complete. Use markdown headers to structure each output. Treat this like a collaborative startup sprint — you lead, I approve.