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Oliver Buchannon
Sid Arora

AI Case Study

Airbnb Replaced Press 1 With Four ML Models That Actually Listen

May 18, 2026

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5 min read

Airbnb Replaced Press 1 With Four ML Models That Actually Listen

Airbnb replaced rigid phone menus with four ML models running in real time: ASR, intent detection, semantic retrieval, and paraphrasing. WER dropped from 33% to 10%.

Sid Arora
Sid Arora
What Is LLM Routing, And When Should You Use Multiple Models?

May 11, 2026

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5 min read

What Is LLM Routing, And When Should You Use Multiple Models?

Not every request needs your most expensive model. LLM routing sends simple tasks to cheap models and hard ones to smart ones, cutting costs 30-70%.

Sid Arora
Sid Arora

AI Case Study

How Netflix Turns Generic LLMs into Recommendation Engines

May 6, 2026

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7 min read

How Netflix Turns Generic LLMs into Recommendation Engines

Netflix's recommendation engine drives 80% of viewing. Here's how they built a post-training framework to adapt LLMs for their catalogue from SFT to RL.

Sid Arora
Sid Arora
7 AI Agents Write This Newsletter

Apr 30, 2026

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7 min read

7 AI Agents Write This Newsletter

I built a 7-agent AI pipeline that writes my newsletter (JustAnotherPM) in 45 minutes instead of 8 hours. Here’s the full system, design decisions, and lessons learned.

Sid Arora
Sid Arora

Simplifying AI

How Do LLMs Actually Learn To Be Helpful? A PM's Guide To Post-Training

Apr 27, 2026

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5 min read

How Do LLMs Actually Learn To Be Helpful? A PM's Guide To Post-Training

Pre-training makes a model smart. Post-training makes it useful. Here's how SFT, RLHF, DPO, and Constitutional AI work, explained for PMs.

Sid Arora
Sid Arora

Simplifying AI

Prompt Caching Can Cut Your LLM Bill by 70%. Here's What it Does

Apr 24, 2026

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5 min read

Prompt Caching Can Cut Your LLM Bill by 70%. Here's What it Does

Prompt caching doesn't cache the answer. It caches the question. Here's how it works, what it costs, and how teams are cutting down their LLM bills.

Sid Arora
Sid Arora
Evals Are The New PRD

Apr 22, 2026

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7 min read

Evals Are The New PRD

Evals are replacing PRDs as the primary spec for AI products. Here's why — and how to cover single-turn, multi-turn, and agent evals in 2026.

Sid Arora
Sid Arora

Simplifying AI

What are Managed Agents by Claude?

Apr 20, 2026

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6 min read

What are Managed Agents by Claude?

Anthropic's agent containers kept dying. So they borrowed from OS design and cut latency by 90%. Inside the Managed Agents architecture.

Sid Arora
Sid Arora

AI Case Study

Stripe and OpenAI Killed the Checkout Page

Apr 18, 2026

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4 min read

Stripe and OpenAI Killed the Checkout Page

Stripe and OpenAI co-built ACP, an open standard for AI agents to make purchases. It already powers Instant Checkout in ChatGPT. Here's how it works.

Sid Arora
Sid Arora

Simplifying AI

What is Claude Channels and How Does It Work?

Apr 15, 2026

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9 min read

What is Claude Channels and How Does It Work?

Claude Channels lets external systems push events into a live Claude Code session. Here's what it is, how it works, and why it matters for AI product teams.

Sid Arora
Sid Arora

fundamentals

What Is Agentic RAG And Why Regular RAG Isn't Enough Anymore

Apr 13, 2026

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12 min read

What Is Agentic RAG And Why Regular RAG Isn't Enough Anymore

Classic RAG retrieves once and generates. Agentic RAG retrieves in loops, checks what it found, and goes back for more. Here's what that means for the AI products.

Sid Arora
Sid Arora

Simplifying AI

WTF Is The Difference Between Claude, Claude Code, Claude Cowork

Apr 6, 2026

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8 min read

WTF Is The Difference Between Claude, Claude Code, Claude Cowork

Anthropic now has three products called Claude. One is a chatbot, one writes your code, and one manages your files. Here's how they're different and when to use each.

Sid Arora
Sid Arora

case study

Snapchat Built Stories, but Lost the Game While Others Won

Apr 3, 2026

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12 min read

Snapchat Built Stories, but Lost the Game While Others Won

Zuckerberg even offered $3 billion to buy it. Spiegel said no. Here's the rise, the copy, and the decade-long search for a second act.

Sid Arora
Sid Arora

ai

Everything You Must Know About Mixture of Experts (MoE)

Apr 1, 2026

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12 min read

Everything You Must Know About Mixture of Experts (MoE)

Mixture of Experts (MoE) is the architecture behind GPT-4, Gemini 1.5, and Mixtral. Here's a PM-level explanation of how MoE works and why it matters for your API budget.

Sid Arora
Sid Arora
Grab Does Personalisation For Millions In Under 15 Seconds

Mar 30, 2026

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11 min read

Grab Does Personalisation For Millions In Under 15 Seconds

Grab's personalisation ran on one day old data. Here's how they rebuilt it to react in under 15 seconds — with no engineering required for each new use case.

Sid Arora
Sid Arora
Why Is Spotify Using 6 AI Agents For Building Ad Campaigns (Instead of Using Only One)?

Mar 27, 2026

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12 min read

Why Is Spotify Using 6 AI Agents For Building Ad Campaigns (Instead of Using Only One)?

Spotify's ad planning took 30 minutes and 20+ form fields. Here's how six AI agents cut it to 10 seconds, and what the architecture actually looks like.

Sid Arora
Sid Arora
Claude Just Changed The Vibe Coding Game

Mar 23, 2026

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10 min read

Claude Just Changed The Vibe Coding Game

Claude launched "Channels" allowing vibe coders to continue coding without being on their systems. This is how it works.

Sid Arora
Sid Arora

case study

How Did Notion Win The Productivity Battle?

Mar 20, 2026

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11 min read

How Did Notion Win The Productivity Battle?

Notion reached a $10 billion valuation on just $344 million raised. Here's how a free personal tier and an accidental template ecosystem became its growth engine.

Sid Arora
Sid Arora

Simplifying AI

Why your AI Agent Always “Forgets” Users?

Mar 18, 2026

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11 min read

Why your AI Agent Always “Forgets” Users?

AI agents fail because of poor memory, not bad models. Learn the 4 memory types, why they break, and how to fix your agent’s performance across sessions.

Sid Arora
Sid Arora
Why LinkedIn's Job Recommendations Were Broken — And How an LLM Fixed Them

Mar 16, 2026

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12 min read

Why LinkedIn's Job Recommendations Were Broken — And How an LLM Fixed Them

LinkedIn fine-tuned a 7B-parameter LLM to power job recommendations for 1.2 billion members. Inside the system that delivered their biggest single-model improvement ever.

Sid Arora
Sid Arora

case study

Figma's Journey From A Dorm Room To $56Bn

Mar 13, 2026

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12 min read

Figma's Journey From A Dorm Room To $56Bn

Design had always been a solo activity. Designer worked on a file, saved it, emailed it to a others, they added comments, and the cycle repeated. Figma found it broken.

Sid Arora
Sid Arora
What Is AI And LLM Observability?

Mar 11, 2026

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10 min read

What Is AI And LLM Observability?

How do you know if your AI product is quietly giving users wrong answers? Learn how LLM observability works — traces, spans, LLM-as-judge, and why a 200 OK status code tells you nothing about quality. (Remember to click on"show pictures")

Sid Arora
Sid Arora
What Are AI Guardrails And How Should PMs Think About Them?

Mar 10, 2026

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12 min read

What Are AI Guardrails And How Should PMs Think About Them?

Real AI chatbots failed at Chevrolet, DPD & Air Canada. Here’s how guardrails prevent hallucinations, PII leaks, prompt injection & costly AI mistakes.

Sid Arora
Sid Arora
Did You Know LLMs Actually "Think"?

Mar 9, 2026

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11 min read

Did You Know LLMs Actually "Think"?

LLMs also think and reason. They generate intermediate steps, check its own logic, and build toward an answer piece by piece.

Sid Arora
Sid Arora
What's Happening To Temu?

Mar 6, 2026

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12 min read

What's Happening To Temu?

In two years, Temu became the most downloaded app in America, made its founder the richest person in China, and helped kill Forever 21. Then a single policy change broke the whole thing.

Sid Arora
Sid Arora
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