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Alex Chen

Full-stack dev. Building SaaS. I write about API costs and LLMs.

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Picking a Multimodal AI API From Scratch: What Nobody Tells You

Picking a Multimodal AI API From Scratch: What Nobody Tells You

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8 min read
My CTO Playbook for Dumping OpenAI Without Breaking Anything

My CTO Playbook for Dumping OpenAI Without Breaking Anything

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9 min read
I Wish I'd Known About AI API Speed Sooner — Here's My Honest Breakdown

I Wish I'd Known About AI API Speed Sooner — Here's My Honest Breakdown

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7 min read
The AI API Stack That Saved My Startup From Vendor Lock-In

The AI API Stack That Saved My Startup From Vendor Lock-In

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8 min read
Why I Stopped Giving My Money to AI Walled Gardens

Why I Stopped Giving My Money to AI Walled Gardens

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9 min read
I Ran DeepSeek, Qwen, Kimi, and GLM Through Real Client Work

I Ran DeepSeek, Qwen, Kimi, and GLM Through Real Client Work

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9 min read
DeepSeek vs Qwen vs Kimi vs GLM: A Backend Engineer's Take

DeepSeek vs Qwen vs Kimi vs GLM: A Backend Engineer's Take

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7 min read
How I Cut Our AI API Bill by 97% Without Changing Models

How I Cut Our AI API Bill by 97% Without Changing Models

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8 min read
I A/B Tested Startup vs Enterprise AI API Setups for a Month

I A/B Tested Startup vs Enterprise AI API Setups for a Month

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7 min read
I Cut My AI Bill From $400 To $28 — Freelancer Breakdown

I Cut My AI Bill From $400 To $28 — Freelancer Breakdown

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7 min read
I Compared Chinese AI Models to GPT-4o All Weekend — I Was Shocked

I Compared Chinese AI Models to GPT-4o All Weekend — I Was Shocked

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7 min read
I Tracked Every API Dollar Across 184 Models: Here's The Data

I Tracked Every API Dollar Across 184 Models: Here's The Data

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7 min read
How I Slashed LLM Costs by 40 While Keeping p99 Latency Low

How I Slashed LLM Costs by 40 While Keeping p99 Latency Low

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8 min read
DeepSeek vs Qwen vs Kimi vs GLM: A Cloud Architect's Deep Dive

DeepSeek vs Qwen vs Kimi vs GLM: A Cloud Architect's Deep Dive

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6 min read
I Cut Our AI API Bill by 95% in 90 Days: A CTO's Playbook

I Cut Our AI API Bill by 95% in 90 Days: A CTO's Playbook

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8 min read
Cutting Token Costs From Scratch: What Nobody Tells You in 2026

Cutting Token Costs From Scratch: What Nobody Tells You in 2026

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8 min read
I Cut My Telegram Bot Costs By 60% — Here's Exactly What I Did

I Cut My Telegram Bot Costs By 60% — Here's Exactly What I Did

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9 min read
The Cloud Architect's Field Guide to WordPress AI Chatbots in 2026

The Cloud Architect's Field Guide to WordPress AI Chatbots in 2026

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8 min read
Qwen 3 Max vs DeepSeek V4: A Developer's Honest Comparison

Qwen 3 Max vs DeepSeek V4: A Developer's Honest Comparison

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10 min read
Quick Tip: My OpenAI Auth Fix That Cut Bills by 60%

Quick Tip: My OpenAI Auth Fix That Cut Bills by 60%

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9 min read
I Cut My OpenAI Bill by 97% Without Rewriting a Single Line

I Cut My OpenAI Bill by 97% Without Rewriting a Single Line

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6 min read
I Slashed My AI API Costs by 60% — Here's the Raw Data

I Slashed My AI API Costs by 60% — Here's the Raw Data

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6 min read
How I Ditched GPT-4o for DeepSeek (And Saved a Fortune)

How I Ditched GPT-4o for DeepSeek (And Saved a Fortune)

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9 min read
I Wish I'd Switched to DeepSeek Sooner — Here's the Full Breakdown

I Wish I'd Switched to DeepSeek Sooner — Here's the Full Breakdown

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7 min read
How I Architected RAG for Scale - A Practical Guide for 2026

How I Architected RAG for Scale - A Practical Guide for 2026

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7 min read
I Slashed My AI Bill 65% Ditching OpenAI for Claude (Here's How)

I Slashed My AI Bill 65% Ditching OpenAI for Claude (Here's How)

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9 min read
Bootcamp Grad's DeepSeek V4 Flash Review: Two Weeks of Testing

Bootcamp Grad's DeepSeek V4 Flash Review: Two Weeks of Testing

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8 min read
I Cut My AI Chatbot Bill by 65% — Here's the Exact Math

I Cut My AI Chatbot Bill by 65% — Here's the Exact Math

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7 min read
Quick Tip: I Speed-Tested 15 AI APIs So You Don't Have To

Quick Tip: I Speed-Tested 15 AI APIs So You Don't Have To

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7 min read
I Wish I Knew Multi-Model API Routing Sooner — A Backend Field Report

I Wish I Knew Multi-Model API Routing Sooner — A Backend Field Report

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7 min read
Shipping AI Search From Scratch: What Nobody Tells You

Shipping AI Search From Scratch: What Nobody Tells You

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9 min read
I Tested OpenAI and Anthropic Pricing Side by Side — Here's the Truth

I Tested OpenAI and Anthropic Pricing Side by Side — Here's the Truth

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7 min read
How I Finally Killed the Empty AI API Response Bug

How I Finally Killed the Empty AI API Response Bug

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9 min read
Migrating Off GPT-4 At Scale: ROI, Lock-In, And Real Numbers

Migrating Off GPT-4 At Scale: ROI, Lock-In, And Real Numbers

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7 min read
I Cut My AI API Bill by 60% — Here's the Data-Driven Breakdown

I Cut My AI API Bill by 60% — Here's the Data-Driven Breakdown

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7 min read
How I Cut AI API Costs by 65% — A Freelance Dev's 2026 Guide

How I Cut AI API Costs by 65% — A Freelance Dev's 2026 Guide

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7 min read
How I Rebuilt Our WhatsApp AI Bot in 2026: Field Notes

How I Rebuilt Our WhatsApp AI Bot in 2026: Field Notes

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7 min read
I Wish I Knew This DeepSeek API Trick Sooner — My Full Breakdown

I Wish I Knew This DeepSeek API Trick Sooner — My Full Breakdown

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7 min read
DeepSeek V4 Flash Broke My AI Budget — Here's The Full Cost Breakdown

DeepSeek V4 Flash Broke My AI Budget — Here's The Full Cost Breakdown

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6 min read
How I Replaced Vendor Lock-In With Open AI Models for Security

How I Replaced Vendor Lock-In With Open AI Models for Security

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7 min read
DeepSeek vs Kimi K2: An Open Source Developer's Take

DeepSeek vs Kimi K2: An Open Source Developer's Take

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7 min read
How I Stopped Bleeding Money on AI API Disconnects — A Freelancer's Guide

How I Stopped Bleeding Money on AI API Disconnects — A Freelancer's Guide

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8 min read
Cutting LLM API Costs in 2026: A Reliability-First Playbook

Cutting LLM API Costs in 2026: A Reliability-First Playbook

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6 min read
The Developer's Guide to AI Code Review Tools That Don't Lock You In

The Developer's Guide to AI Code Review Tools That Don't Lock You In

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8 min read
I Cut My AI Forecasting Bill by 65% — Here's the Full Setup

I Cut My AI Forecasting Bill by 65% — Here's the Full Setup

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7 min read
The Developer's Guide to RAG Without the GPT-4o Tax

The Developer's Guide to RAG Without the GPT-4o Tax

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9 min read
Running Chinese LLMs at Scale: A Cloud Architect's Notes

Running Chinese LLMs at Scale: A Cloud Architect's Notes

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9 min read
I Ran 10,000 Requests Comparing DeepSeek vs Grok 2: Here's the Truth

I Ran 10,000 Requests Comparing DeepSeek vs Grok 2: Here's the Truth

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8 min read
How I Beat Token Limit Errors — A Practical Guide for 2026

How I Beat Token Limit Errors — A Practical Guide for 2026

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7 min read
I Was Shocked by How Cheap LLMs Can Be — A Bootcamp Grad's Guide

I Was Shocked by How Cheap LLMs Can Be — A Bootcamp Grad's Guide

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6 min read
I Cut My LLM Bill 90% By Reading the Fine Print on Tokens

I Cut My LLM Bill 90% By Reading the Fine Print on Tokens

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7 min read
I Ran 10K Requests Through DeepSeek V4 Flash: Here's What Happened

I Ran 10K Requests Through DeepSeek V4 Flash: Here's What Happened

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7 min read
Stop Guessing: Real Data Comparing GPT-4o and Gemini Pro

Stop Guessing: Real Data Comparing GPT-4o and Gemini Pro

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8 min read
How I Stopped Paying the Walled Garden Tax with DeepSeek Flutter

How I Stopped Paying the Walled Garden Tax with DeepSeek Flutter

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9 min read
Breaking Free from Walled Gardens: A 2026 AI API Reality Check

Breaking Free from Walled Gardens: A 2026 AI API Reality Check

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6 min read
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10 min read
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9 min read
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9 min read
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9 min read
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10 min read
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