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50 exercises free — no credit card needed

Understand LLMs in
one weekend, not one semester.

247 hands-on exercises where you send real prompts to real AI models. The concepts that take 20 hours to learn from videos take 3 hours when you do them yourself.

You'll need a free Gemini API key from Google AI Studio. Takes 2 minutes.

247
exercises
31
learning units
4
AI models
0
videos
app.tinkerllm.com

Not a video course. A playground.

You learn by doing things, not watching someone else do them. Every concept has an exercise you run yourself.

Real models, real prompts

Your exercises use the same Gemini API that powers Google products. Live calls, not simulations or pre-recorded outputs.

Tweak every parameter

Temperature, Top-K, Top-P, system instructions, stop sequences, thinking budget. Change them live and see the difference.

We show what fails

We told AI we solved P=NP. It believed us. Hallucinations, sycophancy, and bias aren't footnotes here — they're entire lessons.

Instant validation

Every exercise has built-in checks. You know in seconds if your prompt worked. No waiting for a grader or a certificate queue.

Learn by breaking things

Set temperature to 2.0 and watch gibberish. Ask it to count letters in 'strawberry' and watch it fail. That's the lesson.

Your key, your quota

Use your free Google AI Studio key. We never see your prompts or your API key. Your conversations stay between you and Google.

Where you are → Where you'll be

After 247 exercises, this is the difference.

I use ChatGPT every day

I understand how LLMs actually work under the hood

I can't explain temperature or tokens in an interview

I can set up the right config for any LLM task and explain why

I copy-paste prompts from the internet

I craft prompts using zero-shot, few-shot, and chain-of-thought techniques

I trust whatever the AI tells me

I know when models hallucinate, why they agree with nonsense, and how to spot bias

31 learning units. Zero fluff.

From your first prompt to production AI systems. Here are 5 you'll love.

01

Meet the LLM: How Prompting Actually Works

Free

Your first guided interaction with an LLM. Build a working mental model of how prompts actually work.

04

Showing, Not Telling: Examples and Few-Shot Prompting

Free

The single most powerful prompting technique. Control output style and format using just 2-3 examples.

14

Hallucinations: Why LLMs Lie Confidently and How to Fight Back

We told AI we solved P=NP. It congratulated us. Learn why models lie and how to reduce hallucinations.

24

Advanced RAG Architecture — HyDE, Re-ranking, Hybrid Search

Build production-grade RAG systems that actually work. Go beyond basic retrieval with advanced techniques.

26

LLM Agents & Tool Use — ReAct, Function Calling

Build autonomous agents that can use tools, reason through problems, and execute multi-step tasks.

One price. No surprises.

No subscription. No recurring fees. No upsells. Pay once, tinker forever.

Free
₹0

No credit card required

  • Module 1: Prompt Engineering Foundations (50 exercises)
  • Full playground access
  • 4 learning units covering prompting basics
  • Bring your own Gemini API key
  • LLM fundamentals & RAG systems
  • Advanced agents & production systems
  • Completion certificate
Start Free
Full Access
Complete Course
₹499 ₹999

One-time. No subscription.

  • All 31 learning units (247 exercises)
  • LLM fundamentals: tokens, context, temperature
  • Hallucinations, safety, ethics & RAG systems
  • Advanced RAG: HyDE, re-ranking, hybrid search
  • LLM agents, tool use & multi-agent systems
  • Production APIs, evaluation & cost optimization
  • Completion certificate
Get Full Access — ₹499

International: $9 USD

You bring your own Gemini API key (free from Google AI Studio). We don't charge per message or per API call. Your cost is ₹499. That's it.

Ready to tinker?

50 exercises free. No credit card. No catch. Just open the playground and start.

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Stop watching. Start tinkering.